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Authors: Imlay, Ralph W.
Editors:
Date: /1961
Title: Characteristic Lower Cretaceous megafossils from northern Alaska
335 , , 74 , 24 pls.
Host: U.S. Geological Survey Professional Paper:
Document Type: Article\Abst.\Chapter\report
Annotation: Abstract.--The megafossils from the Lower Cretaceous rocks of northern Alaska prove that only the Berriasian, Valanginian, and Albian states are represented by strata. They prove that the lower Berriasian coincides with an erosional unconformity that locally truncates rocks of Jurassic, Triassic, and late Paleozoic age and that Hauterivian, Barremian, and Aptian stages coincide with an angular unconformity involving mountain building, overthrusting, and considerable erosion. They date the Okpikruak formation as being of Berriasian and Valanginian ages and show the earliest Cretaceous sea advanced over a hilly terrane, of which some high spots were not covered until the middle Valanginian. They date the Fortress Mountain formation, the Torok formation, and the overlying formations to the base of the Cenomanian Ninuluk formation as of Albian age only. This is rather astonishing considering that the sedimentary rocks involved, excluding the Fortress Mountain formation, range in thickness from about 9,000 to 11,000 feet. The abrupt termination of the megafossils species at the top of the Albian strata indicates that some major geologic event occurred at the end of Albian time, either in Alaska or in the Boreal region.

The Okpikruak formation of Berriasian to Valanginian age in many places contains an abundance of the pelecypod Aucella, but otherwise contains very few fossils. The Aucellas belong to species that are common in the Boreal region and along the west coast of North America. They premit dividing the Okpikruak formation into three faunal zones based on the stratigraphic distibution of the species. The thick shells of the Aucellas and their common occurrence in coarse detrital sedimentary beds suggest that they lived in the shallowest part of the neritic zone or even partly in the littoral zone.

The beds of Albian age in northern Alaska include more genera and species of marine megafossils than have ever been described previously from Albian beds in lands bordering the Arctic Ocean. Most of the fossils are from beds that are dated as middle Albian. A scarcity of megafossils in the lower Albian beds coincides with a scarcity of microfossils and is ascribed to exceedingly rapid sedimentation. A scarcity of marine megafossils in the latest Albian beds is explained by the fact that part of these beds are continental and much of the remainder are littoral in origin. The Albian sedimentary rocks are divided on the basis of megafossils into 5 faunal zone, of which 3 are of early Albian age, 1 is of middle Albian age, and 1 is probably of late Albian age. The general composition of the megafossil assemblage living in, or on the bottom of the Albian sea in northern Alaska greatly resembles assemblages living today in shallow sea bottoms of temperate latitudes.

UserNote
26AS19 (Mesozoic loc. 13716) , De Long Mts , W.R. Smith, 1926. Kivalina River; exact location unknown. Okpikruak formation. Valanginian formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17); Lat. 68°15'33", Long. 163°54'52" (description from Mayfield et al., 1990); [USGS Mesozoic Catalogue (Washington D.C.) entry: Orig. No. 26AS19. Cretaceous. SE1/4, SW1/4, 686. 3/4 mi. above camp 4, Kivalina River, Lisburne District, Northern Alaska. Coll: Philip S. Smith, April. 22, 1926]
Aucella sublaevis Keyserling
49ASa138 (Mesozoic loc. 24485) , Point Lay , E.G. Sable, 1949. Kukpowruk River. Lat 69 deg. 24'30" N., long 162 deg. 37'30" W. Shale, siltstone and sandstone. Kukpowruk formation, about 2,500 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Tancredia stelcki McLearn
Arctica? sp.
Entolium sp.
49ACh115 (Mesozoic loc. 24469) , Point Lay , R.M. Chapman, 1949. Kukpowruk River. Lat 69 deg. 17'40" N., long 162 deg. 37' W. Siltstone. Kukpowruk formation, about 800 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Echinoid spine
Brittle star
Tancredia sp.
Arctica? sp.
Flaventia? kukpowrukensis Imlay, n. sp.
Panope? kissoumi (McLearn)
Oxytoma sp.
Entolium utukokense Imlay, n. sp.
49ACh117 (Mesozoic loc. 24470) , Point Lay , R. M. Chapman, 1949. Kukpowruk River. Lat 69 deg. 17'40" N., long. 162 deg. 36'30" W. Siltstone. Kukpowruk formation, about 2,100 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Panope? kissoumi (McLearn)
Thracia stelcki McLearn
49ACh120 (Mesozoic loc. 24471) , Point Lay , R. M. Chapman, 1949. Kukpowruk River. Lat 69 deg. 17'40" N., long. 162 deg. 36'45" W. Siltstone. Kukpowruk formation, about 2,100 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Panope? cf. P. elongatissima (McLearn)
49ASa121 (Mesozoic loc. 24484) , Point Lay , E.G. Sable, 1949. Kukpowruk River. Lat 69 deg. 17'45" N., long. 162 deg. 37'20" W. Shale, siltstone and sandstone. Kukpowruk formation, about 2,300 feet above base. Albian.(description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Tancredia stelcki McLearn
23AF100, 23AF101 (Mesozoic loc. 12178) , Point Lay , Wm. T. Foran, 1923. Kukpowruk River, cut banks 43 miles above mouth. Approximate lat 69 deg. 15' N., long 162 deg 42' W. Kukpowruk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
49ASa110 (Mesozoic loc. 24483) , Point Lay , E.G. Sable, 1949. Kukpowruk River. Lat. 69 deg. 15'05" N., long 162 deg 44' W. Shale, siltstone, and sandstone. Kukpowruk formation, about 2,500 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Tancredia sp.
Camptonectes dettermani Imlay, n. sp.
Entolium utukokense Imlay, n. sp.
49ACh99 (Mesozoic loc. 24466) , Point Lay , R.M. Chapman, 1949. Kukpowruk River. Lat. 69 deg 14' N., long 162 deg 39' W. Siltstone. Kukpowruk formation, about 3,340 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Arctica? sp.
Entolium utukokense Imlay, n. sp.
49ACh102 (Mesozoic loc. 24467) , Point Lay , R.M. Chapman, 1949. Kukpowruk River. Lat 69 deg. 14'20" N., long 162 deg 39'30" W. Sandstone and siltstone. Kukpowruk formation, about 2,800 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Thracia stelcki McLearn
49ACh108 (Mesozoic loc. 24468) , Point Lay , R.M. Chapman, 1949. Kukpowruk River. Lat 69 deg 15'15" N., long 162 deg 43' W. Siltstone and shale. Kukpowruk formation, about 1,100 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Solecurtus? chapmani Imlay, n. sp.
Panope? sp.
49ACh87 (Mesozoic loc. 24465) , Point Lay , R.M. Chapman, 1949. Kukpowruk River. Lat 69 deg 09'45" N., long 162 deg 41'30" W. Siltstone. Kukpowruk formation, 3,350 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Arctica? sp.
49ASa88 (Mesozoic loc. 24481) , Point Lay , E.G. Sable, 1949. Kukpowruk River. Lat 69 deg 09' N., long 162 deg. 41'30" W. Shale, siltstone and sandstone. Kukpowruk formation, about 3,900 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Arctica? sp.
49ASa96 (Mesozoic loc. 24482) , Point Lay , E.G. Sable, 1949. Kukpowruk River. Lat 69 deg 11' N., long 162 deg. 42' W. Shale, siltstone, and sandstone. Kukpowruk formation, about 3,400 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Entolium utukokense Imlay, n. sp.
49ACh71 (Mesozoic loc. 24464) , Point Lay , R.M. Chapman, 1949. Kukpowruk River. Lat 69 deg 01' N., long 162 deg. 54' W. Siltstone. Kukpowruk formation, 1,050 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Star fish
49ASa73 (Mesozoic loc. 24480) , De Long Mts , E.G. Sable, 1949. Kukpowruk River. Lat 68 deg. 59'30" N., long 162 deg. 55' W. Shale, siltstone, and sandstone. Kukpowruk formation, about 2,900 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Ditrupa cornu Imlay, n. sp.
Tancredia cf. T. stelcki McLearn
Arctica? sp.
49ASa71 (Mesozoic loc. 24478) , De Long Mts , E.G. Sable, 1949. Kukpowruk River. Lat 68 deg 59'30" N., long 162 deg. 56'20" W. Shale, siltstone, and sandstone. Kukpowruk formation, about 2,740 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Tancredia stelcki McLearn
49ASa72 (Mesozoic loc. 24479) , De Long Mts , E.G. Sable, 1949. Kukpowruk River. Lat 68 deg 59'20" N., long 163 deg. 00'30" W. Kukpowruk formation, about 2,600 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Arctica? sp.
49ASa60 (Mesozoic loc. 24476) , De Long Mts , E.G. Sable, 1949. Kukpowruk River. Lat 68 deg 54'20" N., long 163 deg 06' W. Shale, siltstone, and sandstone. Kukpowruk formation, about 3,180 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Tancredia stelcki McLearn
Isognomon? sp.
Camptonectes dettermani Imlay, n. sp.
49ASa65 (Mesozoic loc. 24477) , De Long Mts , E.G. Sable, 1949. Kukpowruk River. Lat 68 deg 55' N., long 163 deg 04' W. Torok formation, upper 300 feet. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Panope? kissoumi (McLearn)
49ACh54 (Mesozoic loc. 24461) , De Long Mts , R.M. Chapman, 1949. Kukpowruk River. Lat 68 deg. 54'15" N., long 163 deg 03' W. Very fine grained sandstone. Kukpowruk formation, 1,770 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Arctica? sp.
49ACh61 (Mesozoic loc. 24462) , De Long Mts , R.M. Chapman, 1949. Kukpowruk River. Lat 68 deg 55'40" N., long 163 deg. 00'30" W. Siltstone. Kukpowruk formation, about 700 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Star fish
49ACh62 (Mesozoic loc. 24463) , De Long Mts , R.M. Chapman, 1949. Kukpowruk River. Lat 68 deg 54'30" N., long 163 deg. 01' W. Siltstone. Torok formation, probably in the upper 1,000 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Panope? kissoumi (McLearn)
26AS37 (Mesozoic loc. 13717) , De Long Mts , W.R. Smith, 1926. Igloo Mountain near Kukpowruk River. Approximate lat 68 deg. 46'00" N., long 162 deg 50' W. Upper part of Torok formation or Kukpowruk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Arctica? sp.
Panope? kissoumi (McLearn)
49ACh36 (Mesozoic loc. 23698) , De Long Mts , R.M. Chapman, 1949. Six miles southwest of Igloo Mountain near Kukpowruk River. Lat 68 deg 43'40" N., long 163 deg 07'30" W. Shale and sandstone. Okpikruak formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 17)
Aucella sublaevis Keyserling
49ASa46 (Mesozoic loc. 22128) , De Long Mts , E.G. Sable, 1949. Westernmost bend of Kukpowruk River southwest of Igloo Mountain. Lat 68 deg 44' N., long 163 deg 02' W. Sandstone, shale and coquinoid siltstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
26AS66 (Mesozoic loc. 13730) , Utukok River , P.S. Smith, 1926. Kokolik River. Approximate lat 69 deg 15' N., long 161 deg 45' W. Kukpowruk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Star fish
Hamulus? sp.
26AS61 (Mesozoic loc. 13729) , Utukok River , P.S. Smith, 1926. Kokolik River. Approximate lat 69 deg 10' N., long 162 deg 00' W. Probably in Kukpowruk formation, rather than upper part of Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Tancredia sp.
Arctica? sp.
26AS60 (Mesozoic loc. 13728) , Point Lay , P.S. Smith, 1926. Kokolik River. Approximate lat 69 deg. 09' N., long 162 deg 08' W. Probably in Kukpowruk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Gastroplites? sp.
49ACh176 (Mesozoic loc. 24473) , Utukok River , R.M. Chapman, 1949. Kokolik River. Lat 69 deg. 00'20" N., long 161 deg. 53' W. Siltstone and shale. Kukpowruk formation, 1,080 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Tancredia cf. T. stelcki McLearn
Flaventia? kukpowrukensis Imlay, n. sp.
49ACh177 (Mesozoic loc. 24474) , Utukok River , R.M. Chapman, 1949. Kokolik River. Lat 69 deg. 00'30" N., long 161 deg. 50'30" W. Siltstone and shale. Kukpowruk formation, 1,000 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Arctica? sp.
49ACh182 (Mesozoic loc. 24475) , Utukok River , R.M. Chapman, 1949. Kokolik River. Lat 69 deg 00'31" N., long 161 deg. 56' W. Siltstone. Torok formation, about 400 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Flaventia? kukpowrukensis Imlay, n. sp.
49ASa187 (Mesozoic loc. 24488) , Misheguk Mtn , E.G. Sable, 1949. Kokolik River. Lat 68 deg. 59'45" N., long 161 deg 53'45" W. Shale, siltstone, and sandstone. Kukpowruk formation, 1,930 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Arctica? sp.
Cultellus? kokolikensis Imlay, n. sp.
Naticoid gastropods
49ACh153 (Mesozoic loc. 24472) , De Long Mts , R.M. Chapman, 1949. Kokolik River, near top of Poko Mountain. Lat 68 deg. 50'10" N., long 162 deg 20' W. Siltstone and claystone. Kukpowruk formation about 1,500 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
"Unio" sp.
26AS45 (Mesozoic loc. 13720) , Misheguk Mtn , P.S. Smith, 1926. Kokolik River. Approximate lat 68 deg. 53' N., long 161 deg. 58' W. Kukpowruk formation, possibly middle or upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Star fish
26AS48 (Mesozoic loc. 13721) , Misheguk Mtn , P.S. Smith, 1926. Kokolik River, south limb of Tupikchak Basin. Approximate lat 68 deg. 53'00" N., long 161 deg. 59' W. Kukpowruk formation, possibly lower part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Arctica? sp.
Panope? sp.
Entolium utukokense Imlay, n. sp.
26AS49 (Mesozoic loc. 13722) , Misheguk Mtn , P.S. Smith, 1926. Kokolik River. Approximate lat 68 deg 56' N., long 161 deg. 55' W. Kukpowruk formation, possibly in upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Tancredia sp.
Arctica? sp.
Panope? sp.
49ASa165 (Mesozoic loc. 24486) , Misheguk Mtn , E.G. Sable, 1949. Kokolik River. Lat 68 deg. 52'30" N. long 161 deg. 59" W. Shale, siltstone, and sandstone. Kukpowruk formation, 80 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Tancredia sp.
Arctica? sp.
Panope? kissoumi (McLearn)
49ASa165a (Mesozoic loc. 24487) , Misheguk Mtn , E.G. Sable, 1949. Kokolik River. Lat 68 deg. 52'30" N., long 161 deg. 59" W. Float from Kukpowruk formation at or within 80 feet of base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Panope? kissoumi (McLearn)
Entolium utukokense Imlay, n. sp.
50ASa52A (Mesozoic loc. 22481) , Misheguk Mtn , E.G. Sable, 1950. High ridge north of main Iligluruk Creek. Lat 68 deg. 41'22" N., long 161 deg. 31'15" W. Coquinoid limestone imbedded with siltstone and sandstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
50AMg79 (Mesozoic loc. 22497) , Misheguk Mtn , M.D. Mangus, 1950. Lat 68 deg. 41'10" N., long 161 deg. 31'15" W. Quartzitic shale. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
50ASa117 (Mesozoic loc. 22485) , Misheguk Mtn , E.G. Sable, 1950. High ridge north of Iligluruk Creek. Lat 68 deg. 41'07" N., long 161 deg 29'46" W. Coquinoid limestone and interbedded quartzitic siltstone and shale. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
50AMg69 (Mesozoic loc. 22496) , Misheguk Mtn , M.D. Mangus, 1950. Lat 68 deg. 40'30" N., long 161 deg. 14'25" W. Probably upper part of Okpikruak formation, but possibly from Torok formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Lytoceras sp.
50AMg224 (Mesozoic loc. 22500) , Misheguk Mtn , M.D. Mangus, 1950. Lat 68 deg. 30'15" N., long 161 deg 40' W. Graywacke. Okpikruak formation, lower part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
25ASmF5 (Mesozoic loc. 13309) , Unknown , W.R. Smith, 1925. Four miles downstream from head of Utukok River Pass. Exact location unknown. Okpikruak formation. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella subokensis Pavlow?
50ASa251 (Mesozoic loc. 22490) , Misheguk Mtn , E.G. Sable, 1950. North side of east flowing tributary at headwaters of Utukok River. Lat 68 deg. 34'10" N., long 161 deg. 04'30" W. Okpikruak formation, about 75 to 100 feet above base. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
Aucella crassicollis Keyserling
50ASa249 (Mesozoic loc. 22491) , Misheguk Mtn , E.G. Sable, 1950. Two miles west of Utukok River. Lat 68 deg. 34'21" N., long 161 deg. 07'15" W. Sandstone, conglomerate, and shale. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
50ASa262 (Mesozoic loc. 22492) , Misheguk Mtn , E.G. Sable, 1950. West side of Utukok River. Lat 68 deg. 34'20" N., long 161 deg. 03'40" W. Sandstone, conglomerate, and siltstone. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella okensis Pavlow
Aucella sublaevis Keyserling
50ASa92 (Mesozoic loc. 22482) , Misheguk Mtn , E.G. Sable. Headwaters of west fork of Iligluruk Creek. Lat 68 deg. 31'30" N., long 161 deg. 38' W. Sandstone and siltstone. Okpikruak formation, lower 500 feet. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
50ASa97 (Mesozoic loc. 22483) , Misheguk Mtn , E.G. Sable, 1950. West fork of Iligluruk Creek, south of drainage divide. Lat 68 deg. 32'29" N., long 161 deg. 36'30" W. Sandstone, siltstone, and shale. Okpikruak formation, probably middle or upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
50ASa103 (Mesozoic loc. 22484) , Misheguk Mtn , E.G. Sable, 1950. Near head of Iligluruk Creek on south drainage. Lat 68 deg. 30'52" N., long 161 deg. 36'25" W. Dark-grayish-green siltstone and shale. Okpikruak formation, basal part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella sublaevis Keyserling
50ASa135 (Mesozoic loc. 22486) , Misheguk Mtn , E.G. Sable, 1950. Headwaters of the west fork of Iligluruk Creek. Lat 68 deg. 33'50" N., long 161 deg. 19' W. Fine-grained sandstone. Okpikruak formation, basal part (possibly a fault contact with Jurassic). Probably Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella crassicollis Keyserling?
50ASa247 (Mesozoic loc. 22488) , Misheguk Mtn , E.G. Sable, 1950. Ridge at head of east fork of Iligluruk Creek. Lat 68 deg. 33'07" N., long 161 deg. 13'45" W. Conglomerate and conglomeratic sandstone. Okpikruak formation, middle or upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 18)
Aucella crassicollis Keyserling
50ASa135A (Mesozoic loc. 22487) , Misheguk Mtn , E.G. Sable, 1950. Headwaters of west fork of Iligluruk Creek. Lat 68 deg 33'50" N., long 161 deg 19' W. Sandstone. Okpikruak formation, lower 50 feet. Probably Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling?
50ASa267 (Mesozoic loc. 22493) , Misheguk Mtn , E.G. Sable, 1950. South side of the west fork of the Utukok River. Lat 68 deg. 32'03" N., long 161 deg. 07'45" W. Dark-gray silty shale, siltstone, and conglomerate. Okpikruak formation, basal part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling
50AMg187 (Mesozoic loc. 22498) , Misheguk Mtn , M.D. Mangus, 1950. Lat 68 deg 37'40" N., long 160 deg. 59'10" W. Okpikruak formation, upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
50AMg193 (Mesozoic loc. 22499) , Misheguk Mtn , M.D. Mangus, 1950. Lat 68 deg. 32'15" N., long 161 deg. 05' W. Graywacke. Okpikruak formation, lower part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella okensis Pavlow
50ADu191 (Mesozoic loc. 22474) , Misheguk Mtn , J.T. Dutro Jr., 1950. Kugururok Valley, De Long Mountains. Lat 68 deg. 25'45" N., long 161 deg. 14'25" W. Okpikruak formation, lower part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
50ADu199 (Mesozoic loc. 22475) , Misheguk Mtn , J.T. Dutro, Jr. and A.H. Lachenbruch, 1950. Kugururok Valley, De Long Mountains. Lat 68 deg. 26' N., long 161 deg. 15' W. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
50ADu206 (Mesozoic loc. 22476) , Misheguk Mtn , J.T. Dutro, Jr., 1950. Kugururok Valley, north of the main fork on Rock Creek. Lat 68 deg. 27'05" N., long 161 deg. 15'45" W. Okpikruak formation, probably upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
50ALa179 (Mesozoic loc. 22478) , Misheguk Mtn , A.H. Lachenbruch, 1950. Kugururok Valley. Lat 68 deg. 26' N., long 161 deg. 18' W. Okpikruak formation, lower part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella okensis Pavlow
50ALz145 (Mesozoic loc. 22477) , Misheguk Mtn , M.C. Lachenbruch, 1950. Kugururok Valley. Lat 68 deg. 25'55" N., long 161 deg. 08' W. Okpikruak formation, probably upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
50ADu265 (Mesozoic loc. 22479) , Misheguk Mtn , J.T. Dutro, Jr., 1950. Kugururok Valley. Lat 68 deg 18'50" N., long 161 deg. 32'30" W. Conglomerate. Okpikruak formation. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella subokensis Pavlow?
51ASa106 (Mesozoic loc. 22781) , Misheguk Mtn , E.G. Sable, 1951. Hill three-fourths of a mile southeast of west-central fork of Driftwood Creek. Lat 68 deg. 36'45" N., long 160 deg. 43' W. Shale containing limestone lenses. Okpikruak formation, probably upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling
51ASa131 (Mesozoic loc. 22783) , Misheguk Mtn , E.G. Sable, 1951. Hills 2,000 feet northeast of west-central fork of Driftwood Creek. Lat 68 deg. 34'50" N., long 160 deg. 31'30" W. Shale containing limestone lenses. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
51ASa137 (Mesozoic loc. 22784) , Misheguk Mtn , E.G. Sable, 1951. Large cutbank near the head of westernmost fork of Driftwood Creek. Lat 68 deg. 34'25" N., long 160 deg. 30' W. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling
51AMo105 (Mesozoic loc. 22734) , Misheguk Mtn , R. H. Morris, 1951. Crest of ridge three-fourths of a mile west of west-central fork of Driftwood Creek. Lat 68 deg. 36' N., long 160 deg. 38' W. Okpikruak formation, middle part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
51ADu85 (Mesozoic loc. 23565) , Misheguk Mtn , J.T. Dutro, Jr., 1951, Driftwood Creek, one-fourth of a mile east of west-central fork. Lat 68 deg. 36'30" N., long 160 deg. 35'45" W. Okpikruak formation, probably basal part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling
51ASa65 (Mesozoic loc. 22778) , Misheguk Mtn , E.G. Sable, 1951. Two miles east of east-central fork of Driftwood Creek. Lat 68 deg. 36'20" N., long 160 deg. 28'10" W. Shale containing limestone lenses. Okpikruak formation, probably middle part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling
51ASa74 (Mesozoic loc. 22779) , Misheguk Mtn , E.G. Sable, 1951. Hills one-half of a mile east of east-central fork of Driftwood Creek. Lat 68 deg. 37'40" N., long 160 deg. 32'20" W. Shale containing limestone lenses. Okpikruak formation, probably near base. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling
51ASa75 (Mesozoic loc. 22780) , Misheguk Mtn , E.G. Sable, 1951. Hills three-fourths of a mile east of east-central fork of Driftwood Creek. Lat 68 deg. 37'15" N., long 160 deg. 31'25" W. Okpikruak formation, probably lower part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)[Imlay, 1959, p. 166 gives slightly differing lat/long data: 68 deg. 38'05" N., long 160 deg. 29'20" W.]
Aucella crassicollis Keyserling
51ASa120 (Mesozoic loc. 22782) , Misheguk Mtn , E.G. Sable, 1951. One-half of a mile east of east-central fork of Driftwood Creek. Lat 68 deg. 37'10" N., long 160 deg. 32' W. Sandstone and shale containing limestone lenses. Okpikruak formation, lower 150 feet. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
50AMg242 (Mesozoic loc. 22501) , Misheguk Mtn , M.D. Mangus, 1950. Lat 68 deg. 46'30" N., long 160 deg. 41' W. Shale. Okpikruak formation, probably upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
51ASa7 (Mesozoic loc. 22772) , Misheguk Mtn , E.G. Sable, 1951. East side of Driftwood Creek. Lat 68 deg. 46'30" N., long 160 deg. 41' W. Same as loc. 22501. Okpikruak formation, upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella crassicollis Keyserling
51ASa9 (Mesozoic loc. 22773) , Misheguk Mtn , E.G. Sable, 1951. East side of Driftwood Creek. Lat 68 deg. 46'30" N., long 160 deg 41' W. Coquinoid limestone Okpikruak formation, nearly same position as loc. 22772. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
51ASa10 (Mesozoic loc. 22774) , Misheguk Mtn , E.G. Sable, 1951. East side of Driftwood Creek. Lat 68 deg. 46'30" N., long 160 deg. 41' W. Coquinoid limestone. Okpikruak formation, about same position as loc. 22772. Valanginian.(description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
51ASa12 (Mesozoic loc. 22775) , Misheguk Mtn , E.G. Sable, 1951. East side of Driftwood Creek. Lat 68 deg. 46'30" N., long 160 deg. 41' W. Coquinoid limestone. Okpikruak formation, about same position as loc. 22772. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
Belemnites undet..
50ASa300 (Mesozoic loc. 22494) , Misheguk Mtn , E.G. Sable, 1950. Hills east of Driftwood Creek. Lat 68 deg 47'10" N., long. 160 deg. 36'30" W. Coquinoid limestone lenses interbedded with sandstone, siltstone, and shale. Probably Okpikruak formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling?
51ASa299 (Mesozoic loc. 23558) , Misheguk Mtn , E.G. Sable, 1951. West side of Colville River. Lat 68 deg. 52' N., long 160 deg. 20' W. Siltstone, sandstone, and shale interbedded. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Colvillia crassicostata Imlay, n. sp.
51ADu127 (Mesozoic loc. 23566) , Misheguk Mtn , J.T. Dutro, Jr., 1951. Two miles west of Storm Creek. Lat 68 deg. 44'30" N., long 160 deg. 13'30" W. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
51ASa218 (Mesozoic loc. 22785) , Misheguk Mtn , E.G. Sable, 1951. Low hills 2 1/2 miles east of Storm Creek. Lat 68 deg. 44' N., long 160 deg. 02' W. Shale containing limestone lenses and coquinoid sandstone. Okpikruak formation, probably upper part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 19)
Aucella sublaevis Keyserling
51ASa64 (Mesozoic loc. 22777) , Misheguk Mtn , E.G. Sable, 1951. One-half of a mile west of easternmost fork of Driftwood Creek. Lat 68 deg. 38' N., long 160 deg. 25'15" W. Shale containing limestone lenses. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella crassicollis Keyserling
51AMo24 (Mesozoic loc. 22724) , Misheguk Mtn , R.H. Morris, 1951. Ridge one quarter of a mile west of lakes at the base of Thunder Mountain. Lat 68 deg. 40' N., long 160 deg. 20' W. Sandstone lenses in shale. Okpikruak formation, middle part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella sublaevis Keyserling
Aucella crassicollis Keyserling
51AMo41 (Mesozoic loc. 22725) , Misheguk Mtn , R.H. Morris, 1951. Two miles southwest of Thunder Mountain. Lat 68 deg. 38' N., long 160 deg. 22' W. Limestone and sandstone lenses in shale. Okpikruak formation, middle part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella crassicollis Keyserling
51AMo42 (Mesozoic loc. 22726) , Misheguk Mtn , R.H. Morris, 1951. Crest of mountain, 3 miles southwest of Thunder Mountain. Lat 68 deg. 38' N., long 160 deg. 20' W. Fossils from talus of coarse sandstone. Okpikruak formation, upper part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51AMo47 (Mesozoic loc. 22727) , Misheguk Mtn , R.H. Morris, 1951. Small ridge one quarter of a mile west of Storm Creek. Lat 68 deg. 39' N., long 160 deg. 17' W. Okpikruak formation. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella subokensis Pavlow?
51AMo67 (Mesozoic loc. 22728) , Misheguk Mtn , R.H. Morris, 1951. Ridge above Creek 1 1/2 miles southwest of Thunder Mountain. Lat 68 deg. 39'30" N., long 160 deg. 21' W. Okpikruak formation, upper part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella subokensis Pavlow
51AMo68 (Mesozoic loc. 22729) , Misheguk Mtn , R.H. Morris, 1951. Ridge 1 mile south of Thunder Mountain. Lat 68 deg. 39'30" N., long 160 deg. 20' W. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51AMo69 (Mesozoic loc. 22730) , Misheguk Mtn , R.H. Morris, 1951. Ridge 1 mile south of Thunder Mountain. Lat 68 deg. 39'30" N., long 160 deg. 19' W. Sandstone. Okpikruak formation, upper part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51AMo70 (Mesozoic loc. 22731) , Misheguk Mtn , R.H. Morris, 1951. Creek cut in Valley. One-half of a mile south of Thunder Mountain. Lat 68 deg. 39'30" N., long 160 deg. 19' W. Shale containing limestone nodules. Okpikruak formation, near middle. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella crassicollis Keyserling
51AMo72 (Mesozoic loc. 22732) , Misheguk Mtn , R.H. Morris, 1951. Float in creek cut in valley one-half of a mile south of Thunder Mountain. Lat 68 deg. 39'30" N., long 160 deg. 19' W. Okpikruak formation, middle part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51ADu50 (Mesozoic loc. 23564) , Misheguk Mtn , J.T. Dutro, Jr., 1951. South side of Thunder Mountain. Lat 68 deg. 40'00" N., long 160 deg. 20' W. Sandstone and shale containing limestone lenses. Okpikruak formation, lower part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
Aucella subokensis Pavlow
51ASa227 (Mesozoic loc. 22786) , Misheguk Mtn , E.G. Sable, 1951. Hill, 300 feet north of Nuka River. Lat 68 deg. 42'10" N., long 160 deg. 00'30" W. Shale and silty limestone. Okpikruak formation, probably near base. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella subokensis Pavlow
51ASa252 (Mesozoic loc. 22789) , Misheguk Mtn , E.G. Sable, 1951. South bank of the Nuka River. Lat 68 deg. 42'45" N., long 159 deg. 59' W. Interbedded sandstone, siltstone, and silty claystone. Okpikruak formation 25 feet above base. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51ASa255 (Mesozoic loc. 22790) , Misheguk Mtn , E.G. Sable, 1951. North bank of the Nuka River. Lat 68 deg. 42' N., long 160 deg 00'45" W. Interbedded sandstone, siltstone, and silty claystone. Okpikruak formation, 25 feet above base. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)[Imlay, 1959, p. 166 gives slightly different lat/long - 68 deg. 42'10" N., long 159 deg. 56'50" W.]
Aucella okensis Pavlow
51ASa256 (Mesozoic loc. 22791) , Misheguk Mtn , E.G. Sable, 1951. Creek junction 500 feet west of Mes. loc. 22790. Coquinoid limestone interbedded with shale. Okpikruak formation about 100 feet above base. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
Aucella subokensis Pavlow
51ASa261 (Mesozoic loc. 22792) , Misheguk Mtn , E.G. Sable, 1951. North bank of Nuka River. Lat 68 deg. 41'30" N., long 160 deg. 02'10" W. Siltstone, claystone, and limestone lenses. Okpikruak formation, 35 feet above base. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51ASa262 (Mesozoic loc. 22793) , Misheguk Mtn , E.G. Sable, 1951. North bank of Nuka River, in large cutbank 500 feet west of Mes. loc. 23558. Lat 68 deg. 52' N., long 160 deg. 20' W. Shale containing limestone concretions. Aggregate fossil collection from several hundred feet of section. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella sublaevis Keyserling
51ASa267 (Mesozoic loc. 22794) , Misheguk Mtn , E.G. Sable, 1951. Tributary Creek south of Nuka River. Lat 68 deg. 42'30" N., long 159 deg. 58'30" W. Sandstone and shale containing limestone lenses. Okpikruak formation, within 15 feet of base. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella subokensis Pavlow?
51ASa270 (Mesozoic loc. 22795) , Misheguk Mtn , E.G. Sable, 1951. Same location as Mes. loc. 22794. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51ASa1043 (Mesozoic loc. 23559) , Misheguk Mtn , E.G. Sable, 1951. South bank of Nuka River. Lat 68 deg. 42'10" N., long 160 deg. 00'30" W. Coarse-grained sandstone. Okpikruak formation, probably near base. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella okensis Pavlow
51ASa1045 (Mesozoic loc. 23560) , Misheguk Mtn , E.G. Sable, 1951. North bank of Nuka River. Lat 68 deg. 41'30" N., long 160 deg. 02'15" W. Sandstone and shale containing limestone lenses. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)[Imlay, 1959, p. 166 gives different longitude - 159 deg. 59' W.]
Aucella crassicollis Keyserling
51AMo156 (Mesozoic loc. 22736) , Misheguk Mtn , R.H. Morris, 1951. East bank of Nuka River. Lat 68 deg. 41' N., long 160 deg 08' W. Limestone and sandstone lenses in shale. Okpikruak formation, lower part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20) [description given in Imlay, 1959, gives slightly differing lat. (68 deg. 40'30" N) and long. (160 deg. 03' W)]
Aucella sublaevis Keyserling
51AMo157 (Mesozoic loc. 22737) , Misheguk Mtn , R.H. Morris, 1951. East bank of Nuka River. Lat 68 deg. 41' N., long 160 deg. 08' W. Shale containing limestone and sandstone lenses. Okpikruak formation, lower part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella crassicollis Keyserling
51ASa232 (Mesozoic loc. 22787) , Misheguk Mtn , E.G. Sable, 1951. Creek, one-quarter of a mile north of Nuka River. lat 68 deg. 40' N., long 160 deg. 07'30" W. Shale and silty limestone. Okpikruak formation, lower 200 feet. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella sublaevis Keyserling
51ASa233 (Mesozoic loc. 22788) , Misheguk Mtn , E.G. Sable, 1951. Hill, 1,000 feet north of Mes. loc. 22787. Shale and silty limestone. Okpikruak formation, several hundred feet above base. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 20)
Aucella crassicollis Keyserling
51ASa285 (Mesozoic loc. 23553) , Misheguk Mtn , E.G. Sable, 1951. North bank of Nuka River. Lat 68 deg. 40'15" N., long 160 deg. 06'20" W. Shale containing limestone lenses. Okpikruak formation, lower 200 feet. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella sublaevis Keyserling
51ASa287 (Mesozoic loc. 23554) , Misheguk Mtn , E.G. Sable, 1951. North bank of Nuka River. Lat 68 deg. 40'30" N., long 160 deg. 05'20" W. Shale containing limestone lenses. Okpikruak formation, about 300 feet above base. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)[Imlay, 1959, p. 166 gives slightly different lat/long - 68 deg. 40'45" N., long 160 deg. 02'45" W.]
Aucella sublaevis Keyserling
51ASa289 (Mesozoic loc. 23555) , Misheguk Mtn , E.G. Sable, 1951. North bank of Nuka River. Lat 68 deg. 40'45" N., long 160 deg. 05' W. Sandstone and shale containing limestone lenses. Okpikruak formation, about 300 feet higher stratigraphically than Mes. loc. 23556. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella subokensis Pavlow
51ASa290 (Mesozoic loc. 23556) , Misheguk Mtn , E.G. Sable, 1951. Cutbank on the north side of Nuka River about 1,000 feet north of Mes. loc. 23555. Coquinoid limestone and shale. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella subokensis Pavlow
51ASa291 (Mesozoic loc. 23557) , Misheguk Mtn , E.G. Sable, 1951. Same location as Mes. loc. 23556, but 3 feet lower in section. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella okensis Pavlow
51ADu131 (Mesozoic loc. 23567) , Misheguk Mtn , J.T. Dutro, Jr., 1951. One and one-half miles west of Storm Creek. Lat 68 deg. 42'40" N., long 160 deg. 13' W. Clay shale containing limestone lenses. Okpikruak formation. Valanginian.(description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella sublaevis Keyserling
51ASa279 (Mesozoic loc. 23551) , Misheguk Mtn , E.G. Sable, 1951. Mountainside west of main divide between Nuka River and Nimiuktuk River. Lat 68 deg. 35'30" N., long 160 deg. 15' W. Sandstone and shale containing limestone lenses. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella crassicollis Keyserling
50ADu5 (Mesozoic loc. 22471) , Misheguk Mtn , J.T. Dutro. Jr., 1950. West side of Nimiuktuk River. Lat 68 deg. 20'30" N., long 159 deg. 57' W. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella sp.
50ALz6 (Mesozoic loc. 22472) , Misheguk Mtn , M.C. Lachenbruch and A.H. Lachenbruch, 1950. North bank of Seagull Creek, Nimiuktuk Valley. DeLong Mountains. Lat 68 deg. 19'50" N., long 159 deg. 59' W. Okpikruak formation, lower part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella okensis Pavlow
Aucella subokensis Pavlow
50ALz13 (Mesozoic loc. 22473) , Misheguk Mtn , M.C. Lachenbruch, 1950. Nimiuktuk Valley. Lat 68 deg. 21' N., long 160 deg. 00' W. Okpikruak formation, lower part. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Aucella crassicollis Keyserling?
50ASa32 (Mesozoic loc. 22480) , Misheguk Mtn , E.G. Sable, 1950. Tributary of Utukok River. Lat 68 deg. 53'24" N., long 161 deg. 21' W. Dark-gray calcareous siltstone interbedded with shale. Torok formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Ditrupa cornu Imlay, n. sp.
Tancredia sp.
47ATm5 (Mesozoic loc. 24451) , Misheguk Mtn , R.M. Thompson, 1947. Northwest of Utukok River 1.2 miles. Lat 68 deg. 57' N., long 161 deg. 14' W. Sandstone. Kukpowruk formation, about 700 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Panope? sp.
Entolium sp.
47ATm9 (Mesozoic loc. 24452) , Utukok River , R.M. Thompson, 1947. West of Utukok River about 4.9 miles. Lat 69 deg. 07'30" N., long 161 deg. 03'45" W. Sandstone. Kukpowruk formation, about 500 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Oxytoma camselli McLearn
47ATm10, Bed 29 (Mesozoic loc. 24455) , Utukok River , R.M. Thompson, 1947. Utukok River, about 2 miles north of a south bend. Lat 69 deg. 08'15" N., long 160 deg. 49'00" W. Sandstone and claystone. Kukpowruk formation, 2,080 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Tancredia kurupana Imlay, n. sp.
Oxytoma sp.
47ATm10, Bed 10 (Mesozoic loc. 24453) , Utukok River , R.M. Thompson, 1947. Southeast of Utukok River about 0.4 mile. Lat 69 deg. 07' N., long 160 deg. 50'02" W. Sandstone and siltstone. Kukpowruk formation, 380 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Tancredia stelcki McLearn
Tancredia kurupana Imlay, n. sp.
Camptonectes dettermani Imlay, n. sp.
47ATm10, Bed 16 (Mesozoic loc. 24454) , Utukok River , R.M. Thompson, 1947. Utukok River. Lat 69 deg. 07'10" N., long 160 deg. 49'20" W. Sandstone and claystone. Kukpowruk formation, 840 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Oxytoma cf. O. pinania McLearn
Camptonectes dettermani Imlay, n. sp.
Entolium utukokense Imlay, n. sp.
47ABa52 (Mesozoic loc. 24460) , Utukok River , W.L. Barksdale, 1947. Utukok River lat 69 deg. 07' N., long 160 deg. 39'33" W. Sandstone and claystone. Kukpowruk formation, about 600 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Tancredia kurupana Imlay, n. sp.
Oxytoma sp.
Camptonectes dettermani Imlay, n. sp.
Entolium utukokense Imlay, n. sp.
47ABa34 (Mesozoic loc. 24459) , Utukok River , W.L. Barksdale, 1947. About 7 1/2 miles due east of Utukok River. Lat 69 deg. 02'05" N., long 160 deg. 35' W. Kukpowruk formation, about 400 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Arctica? sp.
Panope? sp.
Entolium sp.
47ATm11 (Mesozoic loc. 24456) , Utukok River , R.M. Thompson, 1947. East bank of Utukok River. Lat 69 deg. 09'45" N., long 160 deg. 33'30" W. Sandstone and claystone. Kukpowruk formation, about 500 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Panope? elongatissima (McLearn)
47ATm12 (Mesozoic loc. 24457) , Utukok River , R.M. Thompson, 1947. About four-tenths of a mile north of Mes. loc. 24456 from river gravels. Probably Kukpowruk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
47ATm13, Bed 13 (Mesozoic loc. 24458) , Utukok River , R.M. Thompson, 1947, near Utukok River. Lat 69 deg. 14'20" N., long 160 deg. 35'45" W. Sandstone. Kukpowruk formation, about 870 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Tancredia stelcki McLearn
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Isognomon? sp.
Entolium utukokense Imlay, n. sp.
25ASmF6 (Mesozoic loc. 13310) , Utukok River , W.R. Smith, 1925. Two miles north of Colville River. Approximate lat 69 deg. 01' N., long 160 deg. 00' W. Probably in Kukpowruk formation, but possibly in upper part of Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Arctica? sp.
50AWh10 (Mesozoic loc. 25809) , Utukok River , C.L. Whittington, 1950. West bank of Utukok River, about 6 1/4 miles northwest of mouth of Carbon Creek. Lat 69 deg. 23' N., long 159 deg. 59' W. Rubble from 23 feet of sandstone. Kukpowruk formation, about 1,025 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Brittle star
50AWh9 (Mesozoic loc. 25810) , Utukok River , C.L. Whittington, 1950. Same loc. as Mes. loc. 25809, but about 165 feet lower. Kukpowruk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Entolium utukokense Imlay, n. sp.
53ABl64 (Mesozoic loc. 25918) , Utukok River , R.S. Bickel, 1953. Utukok River, west bank, about 6 1/4 miles northwest of mouth of Carbon Creek. Lat 69 deg. 23'20" N., long 159 deg. 59' W. Same location as Mes. locs. 25809 amd 25810. Kukpowruk formation, 925 to 1,060 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 21)
Kirklandia? sp.
Ditrupa cornu Imlay, n. sp.
50ASv11 (Mesozoic loc. 25806) , Utukok River , J.M. Stevens, 1950. West bank of creek, 300 feet north of Utukok River and 3 1/4 miles northwest of mouth of Carbon Creek. Lat 69 deg. 22' N., long 159 deg. 52' W. Sandstone and shale. Kukpowruk formation, about 1,000 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Entolium utukokense Imlay, n. sp.
50AWh4 (Mesozoic loc. 25808) , Utukok River , C.L. Whittington, 1950. West bank of east fork of Ketik River, about 16 1/2 miles northeast of mouth of Carbon Creek. Lat 69 deg. 30' N., long 159 deg. 14' W. Conglomeratic sandstone underlain by coal. Corwin formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia sp.
Oxytoma sp.
49AWh69 (Mesozoic loc. 25798) , Lookout Ridge , C.L. Whittington, 1949. About one-half of a mile southeast of Falcon Creek. Lat 69 deg. 25' N., long 158 deg. 05' W. Most prominent sandstone on south flank of Kigalik anticline. Kukpowruk formation at contact with Chandler formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia sp.
46AWb8 (Mesozoic loc. 20491) , Lookout Ridge , E.J. Webber, 1946. Meade River, about one mile east of Falcon Creek. Same as Mes. loc. 25801. Lat 69 deg. 33' N., long 157 deg. 59' W. Kukpowruk formation, near base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia kurupana Imlay, n. sp.
Panope? elongatissima (McLearn)
Paragastroplites cf. P. spiekeri (McLearn)
49AWh76 (Mesozoic loc. 25801) , Lookout Ridge , C.L. Whittington, 1949. Cutbank on east side of meander of Meade River, about 1 mile east of Falcon Creek. Lat 69 deg. 33' N., long 157 deg. 59' W. Same location as Mes. loc. 20491. Lowest sandstone in south third of cutbank. Kukpowruk formation, near base. About 600 feet lower than Mes. loc. 25785. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia sp.
Arctica? sp.
Panope? sp.
Entolium utukokense Imlay, n. sp.
Modiolus sp.
49AWh70 (Mesozoic loc. 25799) , Lookout Ridge , C.L. Whittington, 1949. North bank of Meade River, about 4 miles west of mouth of Pahron Creek. Lat 69 deg. 32' N., long 157 deg. 39' W. Lowest sandstone in poorly exposed 100-foot section. Kukpowruk formation, upper part unless faulted. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia sp.
49AWh71 (Mesozoic loc. 25800) , Lookout Ridge , C.L. Whittington, 1949. Same location as Mes. loc. 25799, but from conglomeratic sandstone 50 feet higher in section. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia kurupana Imlay, n. sp.
49AWh87 (Mesozoic loc. 25802) , Lookout Ridge , C.L. Whittington, 1949. North bank of Meade River about 3 miles west of mouth of Pahron Creek. Lat. 69 deg. 32' N., long. 157 deg. 35' W. Lowest sandstone in poorly exposed 100-foot section of sandstone, shale, coal and ironstone. Corwin formation, probably near base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia stelcki McLearn
49AWh86 (Mesozoic loc. 25785) , Lookout Ridge , C.L. Whittington, 1949. Meade River, east bank, about one-half of a mile southeast of mouth of Pahron Creek. Lat 69 deg. 32' N., long 157 deg. 28' W. About 10 feet of sandstone exposed. Kukpowruk formation, near top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Inoceramus anglicus Woods
49AWh1 (Mesozoic loc. 25793) , Lookout Ridge , C.L. Whittington, 1949. About 2 miles south of upper part of Carbon Creek. Lat 69 deg. 10' N., long 158 deg. 42' W. Sandstone. Kukpowruk formation, about 150 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Ditrupa cornu Imlay, n. sp.
49AKe89 (Mesozoic loc. 25807) , Lookout Ridge , A.S. Keller, 1949. North bank of Awuna River, 2 1/2 miles west of mouth of west flowing tributary. Lat 69 deg. 10' N., long 158 deg. 17' W. Sandstone and siltstone 20 feet thick. Torok formation, about 50 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia sp.
Oxytoma sp.
Naticoid gastropods
49AWh65 (Mesozoic loc. 25797) , Lookout Ridge , C.L. Whittington, 1949. North side of west-flowing tributary of Awuna River about 3 miles east-southeast of junction. Lat 69 deg. 10' N., long 158 deg. 05' W. Slumped sandstone. Torok formation, about 100 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Solecurtus? chapmani Imlay, n. sp.
49AWh62 (Mesozoic loc. 25794) , Lookout Ridge , C.L. Whittington, 1949. South slope of Lookout Ridge about 1 mile north of Grayling Creek. Lat 69 deg. 05' N., long 158 deg. 20' W. Sandstone in lowest exposures. Kukpowruk formation, about 100 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Tancredia kurupana Imlay, n. sp.
51AKt22 (Mesozoic loc. 23573) , Howard Pass , B.H. Kent, 1951. Brady anticline on Kiligwa River. Lat 68 deg. 57' N., long 158 deg. 25' W. Shell beds in dark siltstone and shale. Okpikruak formation, a few hundred feet below top. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Aucella sublaevis Keyserling
53ATr105 (Mesozoic loc. 24693) , Howard Pass , I.L. Tailleur, 1953. Brady anticline on Kiligwa River. Lat 68 deg. 57' N., long 158 deg. 25' W. Same as Mes. loc. 23573. Shell beds in dark siltstone and shale. Okpikruak formation, a few hundred feet below base of Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22) [Note by R.B. Blodgett: The designation of an Albian age is an obvious error, what was probably meant was Valanginian]
Aucella sublaevis Keyserling
53ATr120 (Mesozoic loc. 24694) , Howard Pass , I.L. Tailleur, 1953. Brady anticline on Kiligwa River. Lat 68 deg. 57' N., long 158 deg. 25' W. Interbedded siltstone and shale. Fortress Mountain formation, a few hundred feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
51AKt18 (Mesozoic loc. 24040) , Howard Pass , B.H. Kent, 1951. Kiligwa River. Lat 68 deg. 56' N., long 158 deg. 31' W. Sandstone. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Beudanticeras (Grantziceras) cf. B. affine (Whiteaves)
Colvillia kenti Imlay, n. sp.
53ASa64 (Mesozoic loc. 24695) , Lookout Ridge , E.G. Sable, 1953. Nuka River, east bank, 1 1/2 miles above junction with Colville River. Lat 69 deg. 00' N., long 158 deg. 57' W. Interbedded sandstone, siltstone, and shale. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Placunopsis nuka Imlay, n. sp.
51AKt72 (Mesozoic loc. 24041) , Howard Pass , B.H. Kent, 1951. Kiligwa River. Lat 68 deg. 37' N., long 158 deg. 28' W. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Aucella crassicollis Keyserling
53ATr18 (Mesozoic loc. 24692) , Misheguk Mtn , I.L. Tailleur, 1953. Lat 68 deg. 45' N., long 159 deg. 26' W. Interbedded shale and fine-grained sandstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Aucella crassicollis Keyserling
53ATr9 (Mesozoic loc. 24691) , Misheguk Mtn , I.L. Tailleur, 1953. West of Sorepaw Creek between Nuka and Kiligwa Rivers. Lat 68 deg. 44' N., long 159 deg. 17' W. Sandstone. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Aucella sp.
50ATr280 (Mesozoic loc. 22512) , Howard Pass , I.L. Tailleur, 1950. Kiligwa River. Lat 68 deg. 44' N., long 158 deg. 49' W. Sandstone containing shale interbeds. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Aucella sp.
51ATr177 (Mesozoic loc. 23574) , Howard Pass , I.L. Tailleur, 1951. West fork of Kiligwa River. Lat 68 deg. 44' N., long 158 deg. 49' W. Sandstone and claystone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Aucella sublaevis Keyserling
51ATr209 (Mesozoic loc. 23575) , Howard Pass , I.L. Tailleur, 1951. East fork of Kiligwa River. Lat 68 deg. 41' N., long 158 deg. 28' W. Shale and siltstone. Okpikruak formation, 1,061 to 1,178 feet above base. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 22)
Aucella crassicollis Keyserling
51ATr231 (Mesozoic loc. 23576) , Howard Pass , I.L. Tailleur, 1951. East fork of Kiligwa River. Lat 68 deg. 42' N., long 158 deg. 26' W. Shale, siltstone, and sandstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucella crassicollis Keyserling
50ATr264 (Mesozoic loc. 22511) , Howard Pass , I.L. Tailleur, 1950. Swayback Creek. Lat 68 deg. 44' N., long 158 deg. 07' W. Silty to clayey shale. Fortress Mountain formation, a few hundred feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucellina dowlingi McLearn
25ASmF9 (Mesozoic loc. 13313) , Unknown , W.R. Smith, 1925. Forty miles upstream from mouth of Etivluk River. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucella sp.
49AMg46 (Mesozoic loc. 24657) , Howard Pass , M.D. Mangus, 1949. Kuna River. Lat 68 deg. 38' N., long 157 deg. 55' W. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)[No description given in Imlay E&R report of Oct. 15, 1953; Shipment A-53-14]
Aucella crassicollis Keyserling
49ALa74 (Mesozoic loc. 21821) , Howard Pass , A.H. Lachenbruch, 1949. Bluff on west fork of Kuna River. Fossils in part from sandstone rubble. Lat 68 deg. 32' N., long 157 deg. 56' W. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucella okensis Pavlow
Aucella subokensis Pavlow
50AKt285 (Mesozoic loc. 22522) , Howard Pass , B.H. Kent, 1950. Two miles east of Kuna River. Lat 68 deg. 33' N., long 157 deg. 48' W. Dark greenish-gray, fine-grained graywacke. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucella crassicollis Keyserling
50AKt257 (Mesozoic loc. 22521) , Howard Pass , B.H. Kent, 1950. Between Ipnavik and Kuna Rivers. Lat 68 deg. 38' N., long 157 deg. 30' W. Greenish-gray, fine-grained, thin-bedded graywacke. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucella sp.
50AKt219 (Mesozoic loc. 22519) , Howard Pass , B.H. Kent, 1950. Eight miles east of Kuna River. Lat 68 deg. 37' N., long 157 deg. 36' W. Grayish-green, fine-grained graywacke. Okpikruak formation, lower part. Probably Valanginian.(description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucella crassicollis Keyserling(?)
50AKt185 (Mesozoic loc. 22518) , Howard Pass , B.H. Kent, 1950. Between Ipnavik and Kuna Rivers. Lat 68 deg. 36' N., long 157 deg. 31' W. Dark-green, very fine-grained graywacke. Okpikruak formation, basal part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Aucella crassicollis Keyserling
47ATr132 (Mesozoic loc. 25791) , Lookout Ridge , M.L. Troyer, 1947. Discovery Creek, 6 1/2 miles north of junction with Awuna River. Lat 69 deg. 17' N., long 157 deg. 25' W. Conglomerate sandstone. Kukpowruk formation, about 1,000 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Tancredia stelcki McLearn
Tancredia kurupana Imlay, n. sp.
Entolium utukokense Imlay, n. sp.
47AWh223 (Mesozoic loc. 25792) , Lookout Ridge , C.L. Whittington, 1947. East bank of Quartzite Creek, 7 1/4 miles north of junction with Awuna River. Lat 69 deg. 16' N., long 157 deg. 01' W. From 10 feet of sandstone. Kukpowruk formation, about 100 feet below top and 1,600 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Tancredia stelcki McLearn
Thracia stelcki McLearn
Inoceramus anglicus Woods
52AWh16 (Mesozoic loc. 25803) , Lookout Ridge , C.L. Whittington, 1952. East bank of Quartzite Creek, about 2 3/4 miles north of Awuna River. Lat 69 deg. 13' N., long 157 deg. 04' W. 100 feet above base of exposure. Torok formation, 1,000 to 2,000 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Kirklandia? sp.
47AWh174 (Mesozoic loc. 25812) , Lookout Ridge , C.L. Whittington, 1947. East bank of Quartzite Creek, about 2 3/4 miles north of Awuna River. Lat 69 deg. 13' N., long 157 deg. 04' W. About 90 feet above base of exposures. Torok formation, 1,000 to 2,000 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Crinoid cirri
Inoceramus sp. juv. cf. I. anglicus Woods
Gastroplites sp.
Cleoniceras (Grycia) sablei Imlay, n. sp.
52AWh15 (Mesozoic loc. 25815) , Lookout Ridge , C.L. Whittington, 1952. Same location as Mes. loc. 25812. Float within 25 feet of base of exposures. Torok formation, 1,000 to 2,000 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Paragastroplites aff. P. spiekeri (McLearn)
52AWh40 (Mesozoic loc. 25813) , Lookout Ridge , C.L. Whittington, 1952. Birthday Creek, west fork, 3 3/4 miles northwest of mouth of main creek. Lat 69 deg. 12' N., long 156 deg. 47' W. From 15 feet of shale and siltstone. Torok formation about 1,200 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Cleoniceras (Grycia) sablei Imlay, n. sp.
52AWh17 (Mesozoic loc. 25804) , Lookout Ridge , C.L. Whittington, 1952. East side of Birthday Creek, 2 1/2 miles north of mouth. Lat 69 deg. 12' N., long 156 deg. 38' W. Talus at base of cliffs that consist of 20 feet of shale capped by 8 feet of sandstone. Torok formation, 200 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Ditrupa cornu Imlay, n. sp.
Tancredia sp.
Arctica? sp.
Oxytoma camselli McLearn
Cleoniceras (Neosaynella?) whittingtoni Imlay, n. sp.
52AWh71 (Mesozoic loc. 25805) , Lookout Ridge , C.L. Whittington, 1952. East bank of Birthday Creek, 1 1/4 miles north of mouth. Lat 69 deg. 11' N., long 156 deg. 40' W. From 180 feet above base of 300-foot exposure. Torok formation, about 1,200 to 1,500 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Lima sp.
24AS64, 24AS65 (Mesozoic loc. 12478) , Lookout Ridge , P.S. Smith, 1924. Kigalik River, cut bank on west side about 3 miles north of Birthday Pass. Lat 69 deg. 19' N., long 156 deg. 34' W. Corwin formation, near middle, about 1,500 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Arctica? sp.
24AS67, 24AS68 (Mesozoic loc. 12479) , Lookout Ridge , P.S. Smith, 1924. Kigalik River, about 1 1/2 miles west of east end of the upper canyon. Same as Mes. loc. 25787. Lat 69 deg. 22' N., long 156 deg. 27' W. Kukpowruk formation, inferred to be 1,100 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Ditrupa cornu Imlay, n. sp.
Inoceramus anglicus Woods
24AS69 (Mesozoic loc. 12480) , Lookout Ridge , P.S. Smith, 1924. Kigalik River, north side, one-quarter of a mile west of east end of upper canyon. Same as Mes. loc. 25786. Lat 69 deg. 22' N., long 156 deg. 24' W. Kukpowruk formation, about 100 feet above lowest beds exposed, and inferred to be 1,000 feet above base of formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Inoceramus anglicus Woods
Entolium utukokense Imlay, n. sp.
47AWh103 (Mesozoic loc. 25786) , Lookout Ridge , C.L. Whittington, 1947. Kigalik River, about one-quarter of a mile west of east end of upper canyon. Lat 69 deg. 22' N., long 156 deg. 24' W. Same location as Mes. loc. 12480. Rubble from sandstone about 100 feet above base of outcrops. Kukpowruk formation, about 1,000 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Crinoid cirri
Echinoid spine
Ditrupa cornu Imlay, n. sp.
Tancredia stelcki McLearn
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Pleuromya sp.
Oxytoma sp.
Inoceramus anglicus Woods
Entolium utukokense Imlay, n. sp.
47AWh104 (Mesozoic loc. 25787) , Lookout Ridge , C.L. Whittington, 1947. Kigalik River, about 1 1/2 miles west of east end of upper canyon. Lat 69 deg. 22' N., long 156 deg. 27' W. Same as Mes. loc. 12479. Small sandstone rubble heap. Kukpowruk formation, about 200 feet above lowest outcrop and 1,100 feet above base of formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Inoceramus anglicus Woods
47AWh106 (Mesozoic loc. 25788) , Lookout Ridge , C.L. Whittington, 1947. Kigalik River, on north side about 2 1/4 miles west of east end of upper canyon, Lat 69 deg. 22' N., long 156 deg. 29' W. Sandstone rubble about 100 feet above lowest outcrops. Kukpowruk formation, about 1,000 feet above base of formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 23)
Tancredia stelcki McLearn
47AWh111 (Mesozoic loc. 25789) , Lookout Ridge , C.L. Whittington, 1947. Kigalik River, west side of meander at west end of lower canyon. Lat 69 deg. 22' N., long 156 deg. 21' W. Sandstone rubble in lowest exposures. Kukpowruk formation, about 900 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Flaventia? kukpowrukensis Imlay n. sp.
24AS72, 24AS73 (Mesozoic loc. 12481) , Lookout Ridge , P.S. Smith, 1924. Near Kigalik River. Lat 69 deg. 21' N., long 156 deg. 15' W. to long 156 deg. 19' W. Kukpowruk formation, from 200 to 400 feet above lowest beds exposed, and inferred to be 1,100 to 1,300 feet above base of formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Panope? sp.
47AWh119 (Mesozoic loc. 25790) , Lookout Ridge , C.L. Whittington, 1947. Kigalik River, south side at east end of lower canyon. Lat 69 deg. 21' N., long 156 deg. 13' W. Sandstone rubble from 90-foot exposure. Kukpowruk formation, about 1,100 feet above base of formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Tancredia stelcki McLearn
Arctica? sp.
Inoceramus anglicus Woods
Entolium utukokense Imlay, n. sp.
Cleoniceras (Neosaynella?) whittingtoni Imlay, n. sp.
49ALa141 (Mesozoic loc. 21822) , Howard Pass , A.H. Lachenbruch, 1949. Bluff on north side of Colville River, 2 miles west of Ipnavik River. Lat 68 deg. 54'30" N., long 156 deg. 35' W. Dark shaly sandstone. Torok formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Inoceramus sp. juv.
Subarcthoplites colvillensis Imlay, n. sp.
47ATh324 (Mesozoic loc. 25814) , Howard Pass , R.F. Thurrell, Jr., 1947. Colville River, north bank. Lat 68 deg. 55'10" N., long 156 deg. 31' W. Shale and siltstone. Torok formation, upper part. Probably lower Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Subarcthoplites belli (McLearn)
24AS46 (Mesozoic loc. 12476) , Howard Pass , P.S. Smith, 1924. Etivluk River. Approximate lat 68 deg. 51'30" N., long 156 deg. 04' W. Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Ammonite fragment
24AS50 (Mesozoic loc. 12477) , Howard Pass , P.S. Smith, 1924. Etivluk River, about 8 miles above mouth. Lat 68 deg. 51'30" N., long 156 deg. 04' W. Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Inoceramus sp. juv. cf. I. anglicus Woods
25ASmF7 (Mesozoic loc. 13311) , Howard Pass , W.R. Smith, 1925. Etivluk River, 8 1/2 miles above mouth. Approximate lat 68 deg. 51' N., long 156 deg. 04' W. Torok formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Subarcthoplites bickeli Imlay n. sp.
53ABl94 (Mesozoic loc. 24639) , Howard Pass , R.S. Bickel, 1953. West side of Etivluk River, near junction with east fork. Lat 68 deg. 53' N., long 156 deg. 08' W. Torok formation, upper part, but at least 2,000 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Inoceramus sp. juv. cf. I. anglicus Woods
Subarcthoplites bickeli Imlay, n. sp.
53ABl100 (Mesozoic loc. 24640) , Howard Pass , R.S. Bickel, 1953. West side of Etivluk River near junction of east fork. Lat 68 deg. 53'30" N., long 156 deg. 08' W. Torok formation, upper part, from 630 to 1,000 feet higher than Mes. loc. 24639. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Inoceramus sp. juv. cf. I. anglicus Woods
Puzosia? sp. juv.
Cleoniceras tailleuri Imlay, n. sp.
53ABl80 (Mesozoic loc. 25811) , Howard Pass , R.S. Bickel, 1953. West side Etivluk River, 1 mile above junction with east fork. Lat 68 deg. 51' N., long 156 deg. 11' W. Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Inoceramus cf. I. altifluminis McLearn
53ABl108 (Mesozoic loc. 24638) , Killik River , R.S. Bickel, 1953. South side of Colville River, 5 miles downstream from mouth of Etivluk River. Lat 68 deg. 58' N., long 156 deg. 46' W. [Note by R.B. Blodgett: the given long., 156 deg., 46 min., does not match the description; what was probably meant was 155 deg. 46 min.] Tuktu formation, 80 feet above base, overlying 520 feet of Killik tongue of Chandler formation, and 3,700 feet below base of Ninuluk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24) [Note by R.B. Blodgett: although locality description on p. 24 cites it as being from Tuktu Formation, citations on pp. 10, 43, 54, 64 and Table 12 indicate that it is in the Grandstand Formation]
Echinoid spine
Brittle star
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Entolium utukokense Imlay, n. sp.
Cleoniceras (Neosaynella?) whittingtoni Imlay, n. sp.
51ATr125 (Mesozoic loc. 23599) , Howard Pass , I.L. Tailleur, 1951. Ipnavik River. Lat 68 deg. 46' N., long 156 deg. 55' W. Siltstone and sandstone. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Inoceramus sp. juv.
51ATr129 (Mesozoic loc. 23600) , Howard Pass , I.L. Tailleur, 1951. Ipnavik River. Lat 68 deg. 67' N., long 156 deg. 46' W. Siltstone and sandstone. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24) [Note by R.B. Blodgett: the given latitude of 68 deg. 67' was what was written in text]
Puzosia? sp. juv.
51ATr135 (Mesozoic loc. 23601) , Howard Pass , I.L. Tailleur, 1951. Ipnavik River. Lat 68 deg. 48' N., long 156 deg. 39' W. Siltstone. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Puzosia? sp. juv.
51ATr144 (Mesozoic loc. 23602) , Howard Pass , I.L. Tailleur, 1951. Ipnavik River. Lat 68 deg. 49' N., long 156 deg. 32' W. Siltstone. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Puzosia? sp. juv.
51ATr139 (Mesozoic loc. 23603) , Howard Pass , I.L. Tailleur, 1951. Ipnavik River. Lat 68 deg. 48' N., long 156 deg. 35' W. Sandstone and siltstone. Fortress Mounatin formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Puzosia? sp. juv.
50ATr217 (Mesozoic loc. 22508) , Howard Pass , I.L. Tailleur, 1950. Ipnavik River. Lat 68 deg. 40' N., long 157 deg. 12' W. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella sublaevis Keyserling
50ATr229 (Mesozoic loc. 22510) , Howard Pass , I.L. Tailleur, 1950. Ipnavik River. Lat 68 deg. 41' N., long 157 deg. 09' W. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella crassicollis Keyserling
50ATr93 (Mesozoic loc. 22503) , Howard Pass , I.L. Tailleur, 1950. Between Etivluk and Ipnavik Rivers. Lat 68 deg. 39' N., long 157 deg. 00' W. Calcareous, fine-grained sandstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella crassicollis Keyserling
50ATr70 (Mesozoic loc. 22502) , Howard Pass , I.L. Tailleur, 1950. Between Etivluk and Ipnavik Rivers. Lat 68 deg. 40' N., long 156 deg. 45' W. Sandstone and siltstone. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Inoceramus sp. juv.
50AKt2000 (Mesozoic loc. 22523) , Howard Pass , B.H. Kent, 1950. Mount Araga. Lat 68 deg. 43' N., long 156 deg. 32' W. Dark-grayish-green graywacke and shale. Fortress Mountain formation, near base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Colvillia cf. C. kenti Imlay, n. sp.
50AKt167 (Mesozoic loc. 22515) , Howard Pass , B.H. Kent, 1950. One mile west of Ipnavik River. Lat 68 deg. 36' N., long 157 deg. 16' W. Grayish-green graywacke. Okpikruak formation, middle part. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella subokensis Pavlow (?)
50AKt174 (Mesozoic loc. 22517) , Howard Pass , B.H. Kent, 1950. One mile west of Ipnavik River. Lat 68 deg. 37' N., long 157 deg. 16' W. Dark-greenish-gray graywacke. Okpikruak formation, lower part. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella crassicollis Keyserling
50ATr139 (Mesozoic loc. 22506) , Howard Pass , I.L. Tailleur, 1950. Ipnavik River. Lat 68 deg. 34' N., long 157 deg. 11' W. Sandstone containing shale interbeds. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella crassicollis Keyserling
50AKt173 (Mesozoic loc. 22516) , Howard Pass , B.H. Kent, 1950. East bank of Ipnavik River southwest of Ekakevik Mountain. Lat 68 deg. 36' N., long 157 deg. 13' W. Gray to green graywacke. Okpikruak formation. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella subokensis Pavlow (?)
50AKt113 (Mesozoic loc. 22514) , Howard Pass , B.H. Kent, 1950. Northeast of Ekakevik Mountain. Lat 68 deg. 36' N., long 156 deg. 57' W. Gray to green graywacke. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella crassicollis Keyserling
50ATr128 (Mesozoic loc. 22505) , Howard Pass , I.L. Tailleur, 1950. Ipnavik River. Lat 68 deg. 33' N., long 157 deg. 13' W. Sandstone and shale. Okpikruak formation, near middle. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella crassicollis Keyserling
50ATr122 (Mesozoic loc. 22504) , Howard Pass , I.L. Tailleur, 1950. Five miles south of Ekakevik Mountain on Ipnavik River. Lat 68 deg. 30' N., long 157 deg. 15' W. Sandstone containing shale interbeds. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 24)
Aucella sp.
49ADt39 (Mesozoic loc. 24656) , Howard Pass , R.L. Detterman, 1949. East side. Nigu River, 6 miles upstream from junction with Etivluk River. Lat 68 deg. 24' N., long 156 deg. 25' W. Okpikruak formation. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)[No description given in Imlay E&R report of Oct. 15, 1953; Shipment A-53-14 - cited therein as 49ADt39f]
Aucella subokensis Pavlow (?)
45AZ555a (Mesozoic loc. 26141) , Ikpikpuk River , J.H. Zomberge, 1947. Colville River, south bank. Lat 69 deg. 00'15" N., long 155 deg. 31' W. Sandstone, siltstone, and shale. Chandler formation, lower part of Killik tongue or possibly Grandstand formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
"Unio" sp.
46ACh115 (Mesozoic loc. 20396) , Killik River , R.M. Chapman, 1946. Kurupa River. Lat 68 deg. 54' N., long 155 deg. 13' W. Sandstone. Middle of Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Arctica? sp.
Veniella sp.
Modiolus archisikanni McLearn
46ACh120 (Mesozoic loc. 20397) , Killik River , R.M. Chapman, 1946. Kurupa River. Lat 68 deg. 54' N., long 155 deg. 13' W. Sandstone. Tuktu formation, about 400 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Ditrupa cornu Imlay, n. sp.
Astarte sp.
Arctica? sp.
Panope? sp.
Oxytoma sp.
Entolium sp.
Modiolus archisikanni McLearn
Naticoid gastropods
Paragastroplites spiekeri (McLearn)
46ACh137 (Mesozoic loc. 20398) , Killik River , R.M. Chapman, 1946. Kurupa River. Lat 68 deg. 59' N., long 155 deg. 10' W. Shaly sandstone. Grandstand formation, 300 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Arctica? sp.
46ACh139 (Mesozoic loc. 20399) , Killik River , R.M. Chapman, 1946. Kurupa River. Lat 68 deg. 59' N., long 155 deg. 10' W. Sandstone and conglomerate. Grandstand formation, 700 feet above Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Panope? elongatissima (McLearn)
Inoceramus anglicus Woods
46ACh124 (Mesozoic loc. 20412) , Killik River , R.M. Chapman, 1946. Kurupa River. Lat 68 deg. 57'30" N., long 155 deg. 10' W. Tuktu formation, basal 150 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Ditrupa cornu Imlay, n. sp.
Tancredia sp.
Thracia stelcki McLearn
46ATh106 (Mesozoic loc. 20405) , Killik River , R.F. Thurrell Jr., 1946. Kurupa River. Lat 68 deg. 50' N., long 155 deg. 17' W. Sandstone and shale. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Ditrupa cornu Imlay, n. sp.
Dicranodonta dowlingi McLearn
Tancredia kurupana Imlay, n. sp.
Arctica? sp.
Panope? elongatissima (McLearn)
Goniomya matonabbei McLearn
Inoceramus sp.
Entolium utukokense Imlay, n. sp.
Modiolus archisikanni McLearn
Cleoniceras (Grycia) sablei Imlay, n. sp.
50ARe87 (Mesozoic loc. 23172) , Killik River , C.D. Reynolds, 1950. Oolamnagavik River. Lat 68 deg. 29'15" N., long 154 deg. 23' W. Shaly limestone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Aucella sublaevis Keyserling
46ACh57 (Mesozoic loc. 20392) , Killik River , R.M. Chapman, 1946. Oolamnagavik River. Lat 68 deg. 48' N., long 154 deg. 25' W. Sandstone and shale. Tuktu formation, about 150 ft. above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Worm? burrows
Arctica? sp.
Inoceramus anglicus Woods
Entolium sp.
46ACh67 (Mesozoic loc. 20394) , Killik River , R.M. Chapman, 1946. Oolamnagavik River. Lat 68 deg. 48'30" N., long 154 deg. 24' W. Conglomerate and sandstone. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Ditrupa cornu Imlay, n. sp.
Dicranodonta dowlingi McLearn
Lucina sp.
Inoceramus anglicus Woods
Entolium sp.
46ACh68 (Mesozoic loc. 20395) , Killik River , R.M. Chapman, 1946. Oolamnagavik River. Lat 68 deg. 48' N., long 154 deg. 22' W. Sandstone and conglomerate. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Dicranodonta dowlingi McLearn
Lucina sp.
Arctica? sp.
Solecurtus? chapmani Imlay, n. sp.
Pleuromya sikanni McLearn
Panope? sp.
Pinna cf. P. hagi McLearn
Modiolus archisikanni McLearn
Naticoid gastropods
Cleoniceras cf. C. (Neoaynella?) whittingtoni Imlay
46ATh55 (Mesozoic loc. 20401) , Killik River , R.F. Thurrell Jr., 1946. Oolamnagavik River. Lat 68 deg. 48' N. long 154 deg. 18' W. Sandstone and conglomerate. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Tancredia sp.
Pleuromya sp.
46ATh60 (Mesozoic loc. 20402) , Killik River , R.F. Thurrell, Jr., 1946. Oolamnagavik River. Lat 68 deg. 51' N., long 154 deg. 10' W. Sandstone. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
46ATh67 (Mesozoic loc. 20403) , Killik River , R.F. Thurrell, Jr., 1946. Oolamnagavik River. Lat 68 deg. 52' N., long 154 deg. 11' W. Siltstone and sandstone. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Ditrupa cornu Imlay, n. sp.
Dicranodonta dowlingi McLearn
Oxytoma camselli McLearn
Inoceramus sp.
Entolium utukokense Imlay
Paragastroplites flexicostatus Imlay, n. sp.
53ADt65 (Mesozoic loc. 24617) , Ikpikpuk River , R.L. Detterman, 1953. Colville River. Lat 69 deg. 03'30" N., long 154 deg. 14' W. Chandler formation, Killik tongue, lower part, 2,000 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25) [Brown E&R report of Oct. 22, 1953 (Shipment A-53-14) provides following description: "D-42. On Colville River."; however, transmittal sheet of Detterman (Sept. 30, 1953) provides following: "Sample No. 53ADt65 Station No. D-42 Location: 69 deg. 03'30"N., 154 deg. 14'W. 684, SE1/4 of NE1/4, Colville River Formation: Chandler, Killik tongue Positon: Lower D Lithology: Sandstone, siltstone, siltshale, coal."]
"Unio" sp.
46ATh80 (Mesozoic loc. 20404) , Ikpikpuk River , R.F. Thurrell, Jr., 1946. Colville River. Lat 69 deg. 00' N., long 154 deg. 05' W. Sandstone. Tuktu formation, upper 200 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Crinoid stems and cirri
46ATh209 (Mesozoic loc. 20406) , Killik River , R.F. Thurrell, Jr., 1946. Colville River. Lat 68 deg. 59' N., long 154 deg. 02' W. Sandstone and silty shale. Tuktu formation, upper 150 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
46ATh211 (Mesozoic loc. 20407) , Killik River , R.F. Thurrell, Jr., 1946. Junction of Oolamnagavik and Colville Rivers. Lat 68 deg. 59' N., long 154 deg. 09' W. Sandstone. Tuktu formation, probably upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
brittle star
Ditrupa cornu Imlay, n. sp.
Entolium utukokense Imlay, n. sp.
46ATh219 (Mesozoic loc. 20408) , Ikpikpuk River , R.F. Thurrell, Jr., 1946. Colville River. Lat 69 deg. 00' N., long 159 deg. 03' W. Sandstone and shale. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25) [Note by R.B. Blodgett: the long. given above of 159 deg. does not agree with plotted location on Pl. 21, which indicates that it is more probably 154 deg.]
Tancredia sp.
Arctica? sp.
46Th222 (Mesozoic loc. 20409) , Ikpikpuk River , R.F. Thurrell, Jr., 1946. Lat 69 deg. 00' N., long 154 deg. 03' W. Sandstone and shale. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
46ATh230 (Mesozoic loc. 20411) , Ikpikpuk River , R.F. Thurrell, Jr., 1946. Colville River. Lat 69 deg. 00' N., long 154 deg. 03' W. Sandstone and shale. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Worm? burrows
53AB121 (Mesozoic loc. 24636) , Ikpikpuk River , R.S. Bickel, 1953. North side of Colville River at Killik Bend. Lat 69 deg. 01' N., long 154 deg. 02' W. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
45AWa85B (Mesozoic loc. 20479) , Killik River , L.A. Warner, 1945. Killik River near the Colville River. Lat 68 deg. 59' N., long 153 deg. 51' W. Calcareous siltstone. Killik tongue of Chandler formation, about 500 feet below base of Ninuluk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
"Unio" sp.
45AKr128 (Mesozoic loc. 20473) , Ikpikpuk River , C.E. Kirschner, 1945. Colville River. Lat 69 deg. 04' N., long 153 deg. 42' W. Sandstone, siltstone, and shale. Killik tongue of Chandler formation, about 200 feet below base of Ninuluk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Starfish
45AKr129 (Mesozoic loc. 20474) , Ikpikpuk River , C.E. Kirschner, 1945. Colville River. Same data as Mes. loc. 20473. Chandler formation, within upper 200 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Panope? kissoumi (McLearn)
45AWa72 (Mesozoic loc. 20464) , Killik River , L.A. Warner, 1945. Killik River. Lat 68 deg. 51'15" N., long 153 deg. 24'30" W. Shaly sandstone. Tuktu formation, near middle. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
45AKr82A (Mesozoic loc. 20472) , Killik River , C.E. Kirschner, 1945. Killik River. Lat 68 deg. 51'15'" N., 153 deg. 24'30" W. Shaly sandstone. Tuktu formation, a ittle below middle. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
53ADt48 (Mesozoic loc. 24619) , Killik River , R.L. Detterman, 1953. Killik Bluffs, 4 miles downstream from junction of Killik River with Okpikruak River. Lat 68 deg. 52' N., long 153 deg. 25' W. Tuktu formation, 700 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Killik River, Lat. 68 deg. 52' N., Long. 153 deg. 25' W. 800 feet below top of Tuktu.]
Arctica? sp.
Inoceramus anglicus Woods
53AB19 (Mesozoic loc. 24633) , Killik River , R.S. Bickel, 1953. Killik Bluffs on Killik River. Lat 68 deg. 51' N., long 153 deg. 24' W. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
Inoceramus cf. I. cadottensis McLearn
Gastroplites cf. G. kingi McLearn
53AB113 (Mesozoic loc. 24634) , Killik River , R.S. Bickel, 1953. Killik Bluffs on Killik River. Lat 68 deg. 52' N., long 153 deg. 24' W. Tuktu formation, lower part of middle. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
Paragastroplites flexicostatus Imlay, n. sp.
53AB114 (Mesozoic loc. 24635) , Killik River , R.S. Bickel, 1953. Killik Bluffs on Killik River. Lat 68 deg. 52'30" N., long 153 deg. 24' W. Tuktu formation, lower part of middle. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Inoceramus anglicus Woods
49APa345 (Mesozoic loc. 21558) , Killik River , W.W. Patton, Jr., 1949. Cutbank on east side of Okpikruak River. Lat 68 deg. 38' N., long 153 deg. 30' W. Calcareous sandstone. Fortress Mountain formation, lower third. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 25)
Colvillia crassicostatus Imlay, n. sp.
Colvillia kenti Imlay, n. sp.
49APa347 (Mesozoic loc. 21559) , Killik River , W.W. Patton, Jr., 1949. Cutbank on west side of Okpikruak River. Lat 68 deg. 38' N., long 153 deg. 30' W. Calcareous sandstone. Fortress Mountain formation, lower third. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
45AWa36 (Mesozoic loc. 20470) , Killik River , L.A. Warner, 1945. East bank of Okpikruak River. Lat 68 deg. 35' N., long 153 deg. 29'15" W. Green sandstone, siltstone, and silt shale sequence 200 feet thick, Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella crassicollis Keyserling
45AKr52 (Mesozoic loc. 20471) , Killik River , C.E. Kirschner, 1945. East bank of Okpikruak River. Lat 68 deg. 35'10" N., long 153 deg. 29'45" w. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella crassicollis Keyserling
49ATr374 (Mesozoic loc. 21553) , Killik River , I.L. Tailleur, 1949. Ridge 3,500 feet east of Okpikruak River. Lat 68 deg. 35' N., long 153 deg. 28' W. Shale and sandstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella crassicollis Keyserling
49ATr388 (Mesozoic loc. 21824) , Killik River , I.L. Tailleur, 1949. Cutbank on east sdie of East Fork of Okipikruak River. Lat 68 deg. 35' N., long 153 deg. 29' W. Sandstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella crassicollis Keyserling?
49ATr754 (Mesozoic loc. 21557) , Killik River , I.L. Tailleur, 1949. Cutbank on east side of Pediment Creek. Lat 68 deg. 43' N., long 153 deg. 15' W. Siltstone. Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Subarcthoplites cf. S. colvillensis Imlay, n. sp.
49ATr288 (Mesozoic loc. 21826) , Killik River , I.L. Tailleur, 1949. Cutbank on east side of Fortress Creek. Lat 68 deg. 35' N., long 153 deg. 01' W. Dark clay and silt shale containing concretions. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
49APa192 (Mesozoic loc. 21823) , Chandler Lake , W.W. Patton, Jr., 1949. Ridge 2,500 feet east of Ayiyak River. Lat 68 deg. 35' N., long 152 deg. 48' W. Sandstone and silty shale. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella crassicollis Keyserling
49ATr167 (Mesozoic loc. 21825) , Chandler Lake , I.L. Tailleur, 1949. Cutbank on north side of Fortress Creek. Lat 68 deg. 36' N., long 152 deg. 54' W. Silt and clay shale. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Inoceramus sp. juv.
49APa203 (Mesozoic loc. 21837) , Chandler Lake , W.W. Patton, Jr., 1949. Ridge 4,000 feet east of Ayiyak River. Lat 68 deg. 36' N., long 152 deg. 47' W. Sandstone and silty shale. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella crassicollis Keyserling
49ATr722 (Mesozoic loc. 21556) , Chandler Lake , I.L. Tailleur, 1949. Cutbank on east side of Kiruktagiak River. Lat 68 deg. 37' N., long 152 deg. 43' W. Shale. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucellina dowlingi McLearn
49APa584 (Mesozoic loc. 21562) , Chandler Lake , W.W. Patton, Jr., 1949. Cutbank on west side of Kiruktagiak River. Lat 68 deg. 37' N., long 152 deg. 43' W. Shale and calcareous concretions. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucellina dowlingi McLearn
49APa613 (Mesozoic loc. 26142) , Chandler Lake , W.W. Patton, Jr., 1949. East side of Kiruktagiak River. Lat 68 deg. 35' N., long 152 deg. 45' W. Fortress Mountain formation, 1,800 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Inoceramus cf. I. altifluminis McLearn
49APa400 (Mesozoic loc. 21560) , Chandler Lake , W.W. Patton, Jr., 1949. Cutbank on tributary of Kiruktagiak River 7 1/2 miles south of confluence of Castle Creek with the river. Lat 68 deg. 27' N., long 152 deg. 44' W. Fine-grained sandstone. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella okensis Pavlow
Aucella subokensis Pavlow
49ATr615 (Mesozoic loc. 21555) , Chandler Lake , I.L. Tailleur, 1949. Cutbank on east side of Torok Creek. Lat 68 deg. 34' N., long 152 deg. 29' W. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
49APa512 (Mesozoic loc. 21561) , Chandler Lake , W.W. Patton, Jr., 1949. Ridge 1,500 feet east of Chandler River. Lat 68 deg. 35' N., long 152 deg. 22' W. Silt, clay shale, and fine-grained sandstone. Okpikruak formation. Valanginian.(description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Aucella crassicollis Keyserling
49ATr741 (Mesozoic loc. 21827) , Chandler Lake , I.L. Tailleur, 1949. Cutbank on west side of Chandler River at junction with Kiruktagiak River. Lat 68 deg. 44' N., long 152 deg. 19' W. Same locality as 25124. Green to gray sandstone. Tuktu formation, from 360 to 400 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Cleoniceras tailleuri Imlay, n. sp.
48ADt153 (Mesozoic loc. 25124) , Chandler Lake , R.L. Detterman, 1948. West side of Kiruktagiak River near junction with Chandler River. Lat 68 deg. 44' N., long 152 deg. 22' W. Medium-green fine-grained friable shaly sandstone. Tuktu formation, about 360 feet below top. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Inoceramus sp.
48ADt158 (Mesozoic loc. 25125) , Chandler Lake , R.L. Detterman, 1948. Junction of Kiruktagiak and Chandler Rivers. Lat 68 deg. 44' N., long 152 deg. 20'30" W. Silty shale, siltstone, and fine-grained sandstone. Tuktu formation, about 260 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Inoceramus sp.
45AGr31, 45AGr37 (Mesozoic loc. 20454) , Chandler Lake , George Gryc, 1945. Tuktu Bluff. Lat 68 deg. 43'30" N., long 152 deg. 17' W. Fine-grained thick-bedded sandstone. Tuktu formation, basal 250 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Brittle star
Ditrupa cornu Imlay, n. sp.
Yoldia cf. Y. kissoumi McLearn
Astarte ignekensis Imlay, n. sp.
Arctica? sp.
Homomya sp.
Inoceramus cf. I. cadottensis McLearn
48ADt86 (Mesozoic loc. 25120) , Chandler Lake , R.L. Detterman, 1948. South side of Tuktu Bluff on Chandler River. Lat 68 deg. 42'30" N., long 152 deg. 15' W. Interbedded silt, clay shale, and siltstone. Torok formation, 1,400 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Inoceramus sp. juv. cf. I. anglicus Woods
49ATr641 (Mesozoic loc. 21554) , Chandler Lake , I.L. Tailleur, 1949. Cutbanks on east side of Chandler River and north side of Torok Creek. Lat 68 deg. 41' N., long 152 deg. 14' W., to 152 deg. 17' W. Torok formation, lower part, 3,800 to 4,500 feet below top of formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Inoceramus sp. juv.
Puzosia? sp. juv.
Beudanticeras (Grantziceras) affine (Whiteaves)
Colvillia crassicostatus Imlay, n. sp.
Colvillia cf. C. crassicostatus Imlay, n. sp.
48ADt129 (Mesozoic loc. 25121) , Chandler Lake , R.L. Detterman, 1948. Tuktu Bluff. Lat 68 deg. 43'30" N., long 152 deg. 17' W. Fine-grained thick-bedded sandstone. Tuktu formation, 260 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Panope? elongatissima (McLearn)
Thracia stelcki McLearn
Entolium utukokense Imlay, n. sp.
48ADt134 (Mesozoic loc. 25122) , Chandler Lake , R.L. Detterman, 1948. Tuktu Bluff. Lat 68 deg. 43'30" N., long 152 deg. 17' W. Fine-grained sandstone and siltstone. Tuktu formation, 360 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Ditrupa cornu Imlay, n. sp.
Panope? sp.
Homomya sp.
48ADt147 (Mesozoic loc. 25123) , Chandler Lake , R.L. Detterman, 1948. Tuktu Bluff. Lat 68 deg. 43'15" N., long 152 deg. 15' W. Thin bed of conglomeratic sandstone. Tuktu formation, 110 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Arctica? sp.
Panope? sp.
50AKe291 (Mesozoic loc. 24431) , Chandler Lake , A.S. Keller, 1950. Cutbank on east side of tributary of Siksikpuk River. Lat 68 deg. 33' N., long 152 deg. 06' W. Fortress Mountain formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 26)
Pleuromya kelleri Imlay, n. sp.
Panope? sp.
Thracia cf. T. kissoumi McLearn
50AKe273 (Mesozoic loc. 22590) , Chandler Lake , A.S. Keller, 1950. Cutbank on east side of Tiglukpuk Creek. Lat 68 deg. 18' N., long 151 deg. 50' W. Sandstone. Okpikruak formation. Berriasian or Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Aucella sp.
50AKe272 (Mesozoic loc. 22592) , Chandler Lake , A.S. Keller, 1950. Cutbank on east side of Tiglukpuk Creek. Lat 68 deg. 18' N., long 151 deg. 50' W. Calcareous siltstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Aucella crassicollis Keyserling
50APa285 (Mesozoic loc. 22594) , Chandler Lake , W.W. Patton, Jr., 1950. Cutbank on west side of Tiglukpuk Creek. Lat 69 deg. 18' N., long 151 deg. 50' W. Calcareous siltstone. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Aucella okensis Pavlow
Phylloceras (Phylloceras) tiglukpukense Imlay, n. sp.
46AGr211 (Mesozoic loc. 20435) , Umiat , George, Gryc, 1946. Colville River, north side. Lat 69 deg. 15'15" W., long 152 deg. 52' W. Same as Mes. loc. 25137. Grandstand formation, 100 to 200 feet above Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Ditrupa cornu Imlay, n. sp.
Tancredia sp.
Arctica? sp.
Panope? kissoumi (McLearn)
Entolium utukokense Imlay, n. sp.
45AKr169A (Mesozoic loc. 20477) , Umiat , C.E. Kirschner, 1945. Colville River. Lat 69 deg. 15' N., long 152 deg. 15' W. Sandstone. Grandstand formation, 100 to 200 feet above Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Ditrupa cornu Imlay, n. sp.
Thracia stelcki McLearn
45AKr171 (Mesozoic loc. 20478) , Umiat , C.E. Kirschner, 1945. Colville River. Lat 69 deg. 16' N., long 152 deg. 40' W. Sandstone. Grandstand formation, 200 to 300 feet above Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Tancredia kurupana Imlay, n. sp.
Panope? sp.
Entolium utukokense Imlay, n. sp.
Xenohelix? sp.
47ADt187 (Mesozoic loc. 25137) , Umiat , R.L. Detterman, 1947. Colville River, north side. Lat 69 deg. 15'15" N., long 152 deg. 52' W. Fine-grained silty dark-gray sandstone. Grandstand formation, 100 to 200 feet above Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Panope? sp.
Entolium utukokense Imlay, n. sp.
24AMt69 (Mesozoic loc. 12413) , Umiat , J.B. Mertie, Jr., 1924. Colville River, northwest bank, 4.3 miles southwest of confluence with Prince Creek. Lat 69 deg. 16'30" N., long 152 deg. 34' W. Grandstand formation, 45 to 50 feet below base of Ninuluk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Thracia stelcki McLearn
46AGr187 (Mesozoic loc. 20432) , Umiat , George Gryc, 1946. Fossil Creek. Lat 69 deg. 13'45" N., long 152 deg. 28'15" W. Medium-grained sandstone. Tuktu formation, 320 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Dicranodonta dowlingi McLearn
46AGr188 (Mesozoic loc. 20433) , Umiat , George Gryc, 1946. Fossil Creek. Lat 69 deg. 13' 45" N., long 152 deg. 28' W. Medium-to fine-grained thick-bedded sandstone. Tuktu formation, 200 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Flaventia? sp.
Pleuromya sp.
46AGr182 (Mesozoic loc. 20492) , Umiat , George Gryc, 1946. Fossil Creek. Lat 69 deg. 14'30" N., long 152 deg. 28' W. Siltstone and shale. Tuktu formation, 800 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Modiolus archisikanni McLearn
53ADt89 (Mesozoic loc. 24620) , Umiat , R.L. Detterman, 1953. Fossil Creek. Lat 68 deg. 14' N., long 152 deg. 28' W. Thin-bedded sandstone and claystone. Tuktu formation, 760 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Fossil Creek, Lat. 68 deg. 14/ N., Long. 152 deg. 28' W.]
Ditrupa cornu Imlay, n. sp.
53ADt90 (Mesozoic loc. 24621) , Umiat , R.L. Detterman, 1953. Fossil Creek. Lat 68 deg. 13'30" N., long 152 deg. 28' W. Thin-bedded sandstone interbedded with silty shale and siltstone. Tuktu formation, 75 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Fossil Creek, Lat. 68 deg. 13'30" N., Long. 152 deg. 28' W.]
Ditrupa cornu Imlay, n. sp.
Entolium utukokense Imlay, n. sp.
Placunopsis spp.
47ADt238 (Mesozoic loc. 25128) , Umiat , R.L. Detterman, 1947. Fossil Creek. Lat 69 deg. 14'15" N., long 152 deg. 28'30" W. Fine-grained thin-bedded sandstone. Tuktu formation, 670 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Ditrupa cornu Imlay, n. sp.
47ADt248 (Mesozoic loc. 25129) , Umiat , R.L. Detterman, 1947. Fossil Creek. Lat 69 deg. 14' N., long 152 deg. 28' W. Interbedded sandstone, siltstone, and silty shale. Tuktu formation, 300 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Pleuromya sikanni McLearn
47ADt243 (Mesozoic loc. 25917) , Umiat , R.L. Detterman, 1947. South side of Fossil Creek. Lat 69 deg. 14' N., long 152 deg. 28'30" W. Tuktu formation, 540 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Gastroplites cf. G. kingi McLearn
53ADt91 (Mesozoic loc. 24622) , Umiat , R.L. Detterman, 1953. Fossil Creek. Lat 68 deg. 13' N., long 152 deg. 28'30" W. Tuktu formation, 320 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Fossil Creek, Lat. 68 deg. 13' N., Long. 152 deg. 28'30" W.]
Entolium utukokense Imlay, n. sp.
47ADt265 (Mesozoic loc. 25138) , Umiat , R.L. Detterman, 1947. Fossil Creek. Lat 69 deg. 12'30" N., long 152 deg. 29'30" W. Interbedded siltstone, clay shale, and coal. Grandstand formation, 320 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Panope? sp.
47ADt267 (Mesozoic loc. 25139) , Umiat , R.L. Detterman, 1947. Fossil Creek. Lat 69 deg. 12'13" N., long 152 deg. 29'30" W. Fine-grained dark-gray sandstone. Grandstand formation, 80 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Arctica? sp.
52AB1229 (Mesozoic loc. 24273) , Umiat , R.S. Bickel, 1952. Chandler River. Lat 69 deg. 12' N., long 151 deg. 52' W. Fine-grained light-yellow sandstone. Grandstand formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Panope? sp.
Entolium sp.
52AB1261 (Mesozoic loc. 24274) , Umiat , R.S. Bickel, 1952. Chandler River. Lat 69 deg. 06' N., long 152 deg. 05' W. Siltstone and shale. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Ditrupa cornu Imlay, n. sp.
Panope? elongatissima (McLearn)
Thracia stelcki McLearn
52ADt202 (Mesozoic loc. 24293) , Umiat , Station No. D-220, quadrangle 683 SW1/4 of NE1/4, Chandler River. Lower Nanushuk formation. Lithology: ss. siltstone, limestone, silt and clay shale with bentonite. (description from Imlay E&R report of 1953)[R.L. Detterman, 1952. Chandler River. Lat. 69 deg. 06' N., long. 151 deg. 58' W. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)]
Panope? sp.
52ADt204 (Mesozoic loc. 24294) , Umiat , Station No. D-221, quadrangle 683 SE1/4 of NW1/4, Chandler River. Lower? Nanushuk. Lithology: ss. thin to med. bedded, fine grained dirty. (description from Imlay 1953 E&R report) [R.L. Detterman, 1952. Chandler River. Lat. 69 deg. 06' N., long. 152 deg. 00'30" W. Thin- to medium-bedded sandstone. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)]
Ditrupa cornu Imlay, n. sp.
Entolium sp.
52ADt206 (Mesozoic loc. 24295) , Umiat , Station No. D-222. Quadrangle 683 NE1/4 of NW1/4. Nanushuk formation, lower? position in fm. Lithology: s.s. with some thin bedded limestone. (description from Imlay 1953 E&R report) [R.L. Detterman, 1952. Chandler River, west side. Lat. 69 deg. 05'30" N., long. 152 deg. 00'30" W. Sandstone and thin-bedded limestone. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)]
Ditrupa cornu Imlay, n. sp.
Entolium sp.
45AGr56 (Mesozoic loc. 20457) , Umiat , George Gryc, 1945. Chandler River. Lat 69 deg. 03'50" N., long 151 deg. 51'30" W. Grandstand formation, 100 to 150 feet below Ninuluk formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)
Inoceramus anglicus Woods
52ADt207 (Mesozoic loc. 24296) , Umiat , Station No. D-223. Quadrangle 683 SW1/4 of NE1/4. Chandler River. Nanushuk formation, lower? position in fm. Lithology: s.s. thin to med. bedded dark neutral. (description from Imlay 1953 E&R report) [R.L. Detterman, 1952. Chandler River, east side. Lat. 69 deg. 05' N., long. 151 deg. 56' W. Thin- to medium-bedded sandstone. Tuktu formation, 75 to 100 feet below top. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)]
Dicranodonta dowlingi McLearn
Thracia cf. T. stelcki McLearn
Inoceramus sp.
52ADt210 (Mesozoic loc. 24297) , Umiat , Station D-224, quadrangle 683 SW1/4 of NE1/4, Chandler River. Middle Nanushuk. Lithology: interbedded, s.s, mudstone, siltstone, silt shale. (description from Imlay 1953 E&R report) [R.L. Detterman, 1952. Chandler River. Lat. 69 deg. 04'45" N., long. 151 deg. 55'30" W. Interbedded sandstone, siltstone and shale. Tuktu formation, 100 to 125 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)]
Panope? elongatissima (McLearn)
52ADt213 (Mesozoic loc. 24298) , Umiat , Station no. D-226, quadrangle 683 SW1/4 of NE1/4, Chandler River. Upper Nanushuk. Lithology: s.s., interbedded siltsotne, siltshale, with two coal seams 6"-8" thick. (description from Imlay 1953 E&R report) [R.L. Detterman, 1952. Chandler River. Lat. 69 deg. 04' N., long. 151 deg. 52' W. Sandstone, siltstone, silty shale, and coal seams. Grandstand formation, about 540 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 27)]
Tancredia sp.
Arctica? sp.
Inoceramus sp.
Entolium utukokense Imlay, n. sp.
48ADt287 (Mesozoic loc. 25126) , Unknown , R.L. Detterman, 1948. Chandler River on south side of the Big Bend anticline. Lat 69 deg. 05' N. long 151 deg. 55'30" W. Silty, thin-bedded sandstone interbedded with siltstone and shale. Tuktu formation, from 50 to 100 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Tancredia sp.
Panope? kissoumi (McLearn)
Modiolus sp.
48ADt280 (Mesozoic loc. 25136) , Unknown , R.L. Detterman, 1948. Chandler River on south side of Big Bend anticline. Lat 69 deg. 04' N., long 151 deg. 52' W. Coarse-grained massive sandstone. Grandstand formation, 500 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Arctica? sp.
Panope? sp.
48ADt341 (Mesozoic loc. 25127) , Unknown , R.L. Detterman, 1948. Trouble Creek. Lat 69 deg. 06'30" N., long 151 deg. 38' W. Interbedded silty shale, clayey shale and fine-grained thin-bedded sandstone. Tuktu formation, upper 100 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Yoldia cf. Y. kissoumi McLearn
Arctica? sp.
52ADt216 (Mesozoic loc. 24299) , Unknown , R.L. Detterman, 1952. Chandler River. Lat 68 deg. 52'30" N., long 151 deg. 55'30" W. Interbedded clay, silt shale, and sandstone. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Ditrupa cornu Imlay, n. sp.
Arctica? sp.
52ADt88 (Mesozoic loc. 24292) , Chandler Lake , Station No. D-94. Quadrangle 683 NE1/4 of SW1/4, Ayiyak River. Nanushuk formation, upper position in fm. (description from Imlay 1953 E&R report) [R.L. Detterman, 1952. Ayiyak River. Lat 68 deg. 52'N., long 152 deg. 17'30"W. Grandstand formation. Albian (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)][Description from entry in USGS Mesozoic locality index (Washington) is as follows: "Colville River Valley. Orig. No. 52-ADt-88. Same locality as 24289, only sta. no. D-94, Ayiyak river. 152 deg. 17'30" W., 68 deg. 52' N. Coll. R.L. Detterman, 1952."]
52 ADt 157 (Mesozoic loc. 24301) , Chandler Lake , Station no. D-169, quadrangle 683 NE1/4 of SW1/4, Anaktuvuk River. Lower Nanushuk. Lithology: s.s fine to medium bedded. (description from Imlay 1953 E&R report) [R.L. Detterman, 1952. Anaktuvuk River. Lat 68 deg. 52'N., long 152 deg. 11'W. Medium-bedded sanstone. Grandstand formation, 240 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)]
Arctica? sp.
Panope? kissoumi (McLearn)
53ADt103 (Mesozoic loc. 24624) , Chandler Lake , R.L. Detterman, 1953. West side Nanushuk River at east end of Roof Top Ridge. Lat 68 deg. 51'30" N., long 150 deg. 30'30" W. Sandstone, siltstone, and silty shale. Tuktu formation, 710 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Nanushuk River. Lat. 68 deg. 51'30" N., Long. 150 deg. 30'30" W.]
Ditrupa cornu Imlay, n. sp.
Arctica? sp.
Panope? kissoumi (McLearn)
53ADt104 (Mesozoic loc. 24625) , Unknown , R.L. Detterman, 1953. Nanushuk River. Lat 68 deg. 51'30" N., long 150 deg. 30'45" W. Siltstone. Tuktu formation, 570 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Nanushuk River, Lat. 68 deg. 51'30" N., Long. 150 deg. 30'45" W.]
Ditrupa cornu Imlay, n. sp.
Nucula (Pectinucula) cf. N. dowlingi McLearn
Astarte portana McLearn
Solecurtus? chapmani Imlay, n. sp.
Panope? elongatissima (McLearn)
Cerithiid? gastropods
53ADt106 (Mesozoic loc. 24626) , Unknown , R.L. Detterman, 1953. Nanushuk River. Lat 68 deg. 51'30" N., long 150 deg. 31' W. Medium-bedded sandstone. Tuktu formation, 100 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Nanushuk River, Lat. 68 deg. 53'30" N., Long. 150 deg. 31" W.]
Arctica? sp.
Panope? sp.
Homomya sp.
Entolium utukokense Imlay, n. sp.
Modiolus archisikanni McLearn
53ADt108 (Mesozoic loc. 24627) , Unknown , R.L. Detterman, 1953. Nanushuk River. Lat 68 deg. 51'30" N., long 150 deg. 31'30" W. Massive sandstone. Tuktu formation, 420 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Nanushuk River, Lat. 68 deg. 51'30" N., Long. 150 deg. 51'30" W. - note by R.B. Blodgett, the Long. was mistakenly give as 51'30" W., the transmittal sheet of Detterman indicates that it was 150 deg. 31'30" W.]
Arctica? sp.
Thracia stelcki McLearn
Trochid? gastropods
47AWb101 (Mesozoic loc. 25131) , Unknown , E.J. Webber, 1947. Nanushuk River at east end of Roof Top Ridge. Lat 68 deg. 51'30" N., long 150 deg. 30'30" W. Siltstone and silty shale containing a few sandstone interbeds. Tuktu formation, about 400 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Thracia stelcki McLearn
47AWb103 (Mesozoic loc. 25132) , Unknown , E.J. Webber, 1947. Nanushuk River at the same location as Mes. loc. 25131. Thin silty fine-grained, greenish sandstone. Tuktu formation, about 350 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Arctica? sp.
47AWb106 (Mesozoic loc. 25133) , Unknown , E.J. Webber, 1947. Nanushuk River at the same location as Mes. loc. 25131. Fine-grained silty greenish-gray sandstone and siltstone. Tuktu formation, about 500 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Astarte ignekensis Imlay, n. sp.
Astarte portana McLearn
Tancredia sp.
Arctica? sp.
Panope? elongatissima (McLearn)
Panope? sp.
Isognomon? sp.
Inoceramus sp.
Entolium utukokense Imlay, n. sp.
Gastroplites cf. G. kingi McLearn
47AWb110 (Mesozoic loc. 25135) , Unknown , E.J. Webber, 1947. Nanushuk River, at the same location as Mes. loc. 25131. Siltstone and thin-bedded sandstone. Tuktu formation, about 720 feet below top. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Ditrupa cornu Imlay, n. sp.
Panope? elongatissima (McLearn)
Gastroplites cf. G. kingi McLearn
45AFs55 (Mesozoic loc. 20480) , Unknown , R.E. Fellows, 1945. Anaktuvuk River, opposite mouth of Kanayut Creek. Lat 68 deg. 44' N., long 151 deg. 07' W. Sandstone and shale. Same location as Mes. loc. 24637. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Crinoid stems and cirri
Ditrupa cornu Imlay, n. sp.
Panope? sp.
Inoceramus sp.
Entolium sp.
Naticoid gastropods
53AB130 (Mesozoic loc. 24637) , Unknown , R.S. Bickel, 1953. Anuktuvuk River, opposite mouth of Kanayut Creek. Lat 68 deg. 44' N., long 151 deg. 07' W. Same location as Mes. loc. 20480. Sandstone and shale. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Star fish
Worm? burrows
Solecurtus? chapmani Imlay
Entolium utukokense Imlay, n. sp.
Gastroplites cf. G. kingi McLearn
Xenohelix? sp.
551-556 (Mesozoic loc. 3204) , Unknown , F.C. Schrader, 1901. Anaktuvuk River, east bank, at mouth of Kanayut Creek. Same as Mes. locs. 20484 and 24623. Lat 68 deg. 44' N., long 151 deg. 03' W. Tuktu formation, upper 100 to 150 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Dicranodonta dowlingi McLearn
Astarte ignekensis Imlay, n. sp.
Inoceramus sp.
Xenohelix? sp.
45AFs217 (Mesozoic loc. 20484) , Unknown , R.E. Fellows, 1945. Anaktuvuk River at junction of Kanayut Creek. Same as Mes. loc. 3204. Last 68 deg. 44' N., long 151 deg. 03' W. Sandstone and shale. Tuktu formation, upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Brittle star
Ditrupa cornu Imlay, n. sp.
Dicranodonta dowlingi McLearn
Panope? elongatissima (McLearn)
Thracia stelcki McLearn
Entolium utukokense Imlay, n. sp.
Placunopsis spp.
Gastroplites kingi McLearn
Paragastroplites flexicostatus Imlay, n. sp.
Xenohelix? sp.
53ADt93 (Mesozoic loc. 24623) , Chandler Lake , R.L. Detterman, 1953. Kanayut Creek. Lat 68 deg. 44' N., long 151 deg. 03' W. Same location as Mes. loc. 20484. Tuktu formation, upper 150 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28))[Imlay E&R report of Oct. 15, 1953 (Shipment A-53-14) provides following description: Kanayut (Willow) Creek, Lat. 68 deg. 44' N., 151 deg. 03' W.]
Ditrupa cornu Imlay, n. sp.
Dicranodonta dowlingi McLearn
Arctica? sp.
Panope? elongatissima (McLearn)
Entolium utukokense Imlay, n. sp.
Modiolus archisikanni McLearn
Beudanticeras? sp.
Xenohelix? sp.
538-540 (Mesozoic loc. 3202) , Unknown , F.C. Schrader, 1901. Anaktuvuk River. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Aucella crassicollis Keyserling
546-548 (Mesozoic loc. 3203) , Unknown , F.C. Schrader, 1901. Anaktuvuk River, east bank. Same as Mes. loc. 20494. Lat 68 deg. 38'15" N., long 151 deg. 09' W. Green sandstone. Tuktu formation, upper 100 to 150 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Worm? burrows
Ditrupa cornu Imlay, n. sp.
Xenohelix? sp.
45AFs28 (Mesozoic loc. 20494) , Unknown , R.E. Fellows, 1945. Anaktuvuk River. Lat 68 deg. 38'15" N., long 151 deg. 09' W. Same as Mes. loc. 3203. Sandstone. Tuktu formation, near middle. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Thracia stelcki McLearn
50AKe213 (Mesozoic loc. 24432) , Unknown , A.S. Keller, 1950. Cutbank on east side of Kanayut Creek. Lat 68 deg. 39' N., long 150 deg. 51' W. Chandler formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Panope? kissoumi (McLearn)
Psilomya sp.
Entolium utukokense Imlay, n. sp.
50APa180 (Mesozoic loc. 24427) , Unknown , W.W. Patton, Jr., 1950. Cutbank on east side of Nanushuk River. Lat 68 deg. 39' N., long 150 deg. 32' W. Tuktu formation, basal 40 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Solecurtus? chapmani Imlay
Panope? elongatissima (McLearn)
Pseudopulchellia pattoni Imlay, n. sp.
47AWb21 (Mesozoic loc. 25130) , Unknown , E.J. Webber, 1947. Nanushuk River. Lat 68 deg. 35'05" N., long 150 deg. 32' W. Siltstone and fine-grained shaly sandstone. Tuktu formation, basal 100 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Panope? elongatissima (McLearn)
Inoceramus sp.
50APa192 (Mesozoic loc. 26140) , Unknown , W.W. Patton, Jr., 1950. Cutbank on east side of Nanushuk River. Lat 68 deg. 39' N., long 150 deg. 32' W. Tuktu formation, upper 76 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Psilomya sp.
50APa156 (Mesozoic loc. 24426) , Unknown , W.W. Patton, Jr., 1950. Cutbank on north side of east fork of Nanushuk River. Lat 68 deg. 35' N., long 150 deg. 24' W. Calcareous sandstone. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Inoceramus cf. I. cadottensis McLearn
50AKe19 (Mesozoic loc. 24428) , Unknown , A.S. Keller, 1950. Ridge east of May Creek. Lat 68 deg. 42' N., long 150 deg. 08' W. Sandstone. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 28)
Isognomon? sp.
50AKe25 (Mesozoic loc. 24429) , Unknown , A.S. Keller, 1950. Cutbank on west side of May Creek. Lat 68 deg. 41' N., long 150 deg. 13' W. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Arctica? sp.
Solecurtus? chapmani Imlay, n. sp.
Pleuromya sikanni McLearn
50AKe35 (Mesozoic loc. 24430) , Unknown , A.S. Keller, 1950. Cutbank on west side of May Creek. Lat 68 deg. 40' N., long 150 deg. 10' W. Sandstone. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Dicranodonta dowlingi McLearn
Arctica? sp.
Panope? elongatissima (McLearn)
Thracia stelcki McLearn
Xenohelix? sp.
50APa29 (Mesozoic loc. 24425) , Unknown , W.W. Patton, Jr., 1950. Cutbank on east side of May Creek. Lat 68 deg. 35' N., long 150 deg. 11' W. Sandstone. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Ditrupa cornu Imlay, n. sp.
Thracia cf. T. stelcki McLearn
50AKe224 (Mesozoic loc. 22589) , Unknown , A.S. Keller, 1950. Cutbank on east side of tributary of Welcome Creek. Lat 68 deg. 25' N., long 150 deg. 49' W. Sandstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella crassicollis Keyserling
50APa201 (Mesozoic loc. 22593) , Unknown , W.W. Patton, Jr., 1950. Cutbank on east side of tributary of Kanayut Creek. Lat 68 deg. 34' N., long 150 deg. 45' W. Calcareous siltstone. Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Gastroplites cf. G. kingi McLearn
46AGr31 (Mesozoic loc. 20437) , Unknown , George Gryc, 1946. Sagavanirktok River. Lat 68 deg. 32' N., long 149 deg. 03' W. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Modiolus sp.
51ADt184 (Mesozoic loc. 22756) , Unknown , R.L. Detterman, 1951. Sagavanirktok River. Lat 68 deg. 39' N., long 149 deg. 02' W. Float from sandstone and conglomerate exposures. Torok formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Inoceramus sp. juv.
46AGr11 (Mesozoic loc. 20436) , Unknown , George Gryc, 1946. Sagavanirktok River. Lat 68 deg. 46' N., long 149 deg. 02' W. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Thracia stelcki McLearn
Isognomon? sp.
51ADt178 (Mesozoic loc. 22755) , Unknown , R.L. Detterman, 1951. Sagavanirktok River. Lat 68 deg. 46' N., long 148 deg. 57' W. Sandstone and siltstone. Tuktu formation, about 600 to 700 feet below top. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Inoceramus sp.
46AGr34 (Mesozoic loc. 20438) , Unknown , George Gryc, 1946. Sagavanirktok River. Lat 68 deg. 56' N., long 148 deg. 47' W. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Inoceramus anglicus Woods
Cleoniceras tailleuri Imlay, n. sp.
51AKe128 (Mesozoic loc. 22765) , Unknown , A.S. Keller, 1951. Nosebleed Creek. Lat 68 deg. 52' N., long 148 deg. 12' W. Siltstone. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella okensis Pavlow
Aucella subokensis Pavlow
51AKe139 (Mesozoic loc. 22767) , Unknown , A.S. Keller, 1951. Lupine River. Lat 68 deg. 54' N., long 148 deg. 18' W. Siltstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella crassicollis Keyserling
46AGr62 (Mesozoic loc. 20439) , Unknown , George Gryc, 1946. Sagavanirktok River. Lat 69 deg. 03' N., long 148 deg. 05' W. Tuktu formation. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Inoceramus anglicus Woods
Gastroplites kingi McLearn
Xenohelix? sp.
51ADt112 (Mesozoic loc. 22753) , Unknown , R.L. Detterman, 1951. West fork of Ivishak River, near junction with main river. Lat 69 deg. 04'45" N., long 148 deg. 03' W. Sandstone, siltstone, and silty shale. Tuktu formation, probably upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Inoceramus cf. I. cadottensis McLearn
Inoceramus cf. I. altifluminis McLearn
51ADt113 (Mesozoic loc. 22754) , Unknown , R.L. Detterman, 1951. West fork of Ivishak River near junction with main river. Lat 69 deg. 04'45" N., long 148 deg. 03' W. Silty sandstone containing interbeds of siltstone and silty shale. Tuktu formation, probably upper part. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Inoceramus anglicus Woods
Gastroplites cf. G. kingi McLearn
Paragastroplites flexicostatus Imlay, n. sp.
51ADt94 (Mesozoic loc. 22744) , Unknown , R.L. Detterman, 1951. Gilead Creek. Lat 69 deg. 15' N., long 147 deg. 49' W. Clay shale. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella sublaevis Keyserling
51AKe761 (Mesozoic loc. 22761) , Unknown , A.S. Keller, 1951. Kashivi Creek. Lat 69 deg. 12' N., long 147 deg. 44' W. Siltstone. Okpikruak formation. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella sublaevis Keyserling
51AKe77 (Mesozoic loc. 22762) , Chandalar , A.S. Keller, 1951. Kashivi Creek. Lat 69 deg. 12' N., long 147 deg. 44' W. Siltstone. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella subokensis Pavlow
51AKe33 (Mesozoic loc. 22758) , Unknown , A.S. Keller, 1951. Echooka River. Lat 69 deg. 24' N., long 147 deg. 42' W. Ignek(?) formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Belemnite fragments
51ADt18 (Mesozoic loc. 22738) , Unknown , R.L. Detterman, 1951. East side of west fork of Shaviovik River. Lat 69 deg. 24'30" N., long 147 deg. 15' W. Silty clay shale. Okpikruak formation. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella okensis Pavlow
Aucella subokensis Pavlow
Belemnites undet.
52AMo3 (Mesozoic loc. 24010) , Unknown , R.H. Morris, 1952. Cutbank on Shaviovik River. Lat 69 deg. 25' N., long 147 deg. 14' W. Limestone lenses in shale. Okpikruak formation, lower part. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella subokensis Pavlow
51ADt50 (Mesozoic loc. 22742) , Unknown , R.L. Detterman, 1951. Kemik Creek. Lat 69 deg. 26'30" N., long 147 deg. 10' W. Siltstone lenses in shale. Okpikruak formation, below middle. Valanginian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella sublaevis Keyserling
51AKe23 (Mesozoic loc. 22757) , Sagavanirktok , A.S. Keller, 1951. Kemik Creek. Lat 69 deg. 26' N., long 147 deg. 10' W. Siltstone lenses. Okpikruak formation, lower 700 feet. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Aucella okensis Pavlow
Aucella subokensis Pavlow
Gastropod fragments
52AMo1 (Mesozoic loc. 24008) , Unknown , R.H. Morris, 1952. East cutbank of Kemik Creek. Lat 69 deg. 25' N., long 147 deg. 10' W. Siltstone and shale. Okpikruak(?) formation, basal sandstone member. Probably Berriasian.(description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Brachiopods undet.
Plicatula sp.
Lytoceras sp.
52AMo2 (Mesozoic loc. 24009) , Unknown , R.H. Morris, 1952. Ridge east of Kemik Creek. Lat. 69 deg. 25' N., long 147 deg. 05' W. Ironstone concretions in shale. Okpikruak(?) formation, basal sandstone member. Probably Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)[Entry in USGS Mesozoic Fossil Locality register (Washington, D.C.) provides following description: "Orig. no. 52AMo-w - Jurassic-Kingak fm. Northern Alaska. St. no. 13, SW 1/4 of NE 1/4, 682, 69 deg. 25' N., 147 deg. 05' W, from a ridge east of Kemik Creek, upper Kingak, Quad. 682, Canning District, Northern Alaska. Coll. by: R.H. Morris - June-Sept. 1952."]
Parallelodon? spp.
Plicatula? sp.
52AKe6 (Mesozoic loc. 24027) , Unknown , A.S. Keller, 1952. Fin Creek. Lat 69 deg. 29' N., long 147 deg. 08' W. Siltstone. Ignek formation, lower member. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Brachiopods undetermined
Panope? sp.
Entolium? sp.
52AKe4 (Mesozoic loc. 24025) , Unknown , A.S. Keller, 1952. Fin Creek. Lat 69 deg. 29' N., long 146 deg. 58' W. Siltstone. Ignek formation, lower member. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Brachiopods undetermined
Yoldia cf. Y. kissoumi McLearn
Entolium? sp.
Eopecten? sp.
100 (Mesozoic loc. 10306) , Unknown , E. de K. Leffingwell, 1911. Canning River, bluff on west side opposite Shublik Island. Lat 69 deg. 32'40" N., long 146 deg. 22'40" W. Sandstone. Ignek formation, lower member. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Ditrupa cornu Imlay, n. sp.
Dicranodonta dowlingi McLearn
Astarte ignekensis Imlay, n. sp.
Arctica? sp.
Panope? elongatissima (McLearn)
Isognomon? sp.
Trochid gastropods
Natica sp.
Belemnite fragments
52AMo44 (Mesozoic loc. 24015) , Unknown , R.H. Morris, 1952. Cutbank on west side of Canning River. Lat 69 deg. 32' N., long 146 deg. 21' W. Ignek formation, lower member, 10 feet above base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
52AMo44A (Mesozoic loc. 24016) , Unknown , R.H. Morris, 1952. Same location as Mes. loc. 24015, but 80 feet above base of Ignek formation.(description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Yoldia cf. Y. kissoumi McLearn
Arctica? sp.
Panope? kissoumi (McLearn)
Panope? elongatissima (McLearn)
52AMo45 (Mesozoic loc. 24017) , Unknown , R.H. Morris, 1952. Same location as Mes. loc. 24015, but 100 feet above base of Ignek formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 29)
Ditrupa cornu Imlay, n. sp.
Astarte ignekensis Imlay, n. sp.
Arctica? sp.
52AMo46 (Mesozoic loc. 24018) , Unknown , R.H. Morris, 1952. Same location as Mes. loc. 24015, but 160 feet above base of Ignek formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Arctica? sp.
52AMo47 (Mesozoic loc. 24019) , Unknown , R.H. Morris, 1952. Same location as Mes. loc. 24015, but 160 feet above base of Ignek formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Astarte ignekensis Imlay, n. sp.
Panope? elongatissima (McLearn)
52AMo53 (Mesozoic loc. 24020) , Unknown , R.H. Morris, 1952. Same location as Mes. loc. 24015, but 100 feet above base of Ignek formation. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Panope? elongatissima (McLearn)
52AKe33 (Mesozoic loc. 24031) , Unknown , A.S. Keller, 1952. Canning River. Lat 69 deg. 32' N., long 146 deg. 25' W. Okpikruak formation, highest bed. Berriasian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Aucella okensis Pavlow
Aucella subokensis Pavlow
Tancredia? sp.
Camptonectes sp.
Belemnites undet.
52AKe44 (Mesozoic loc. 24034) , Unknown , A.S. Keller, 1952. Canning River. Lat 69 deg. 34' N., long 146 deg. 22' W. Sandstone. Ignek formation, lower member, lower 500 feet. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Worm? tubes
Astarte ignekensis Imlay, n. sp.
Arctica? sp.
Entolium? sp.
3 (Mesozoic loc. 10293) , Unknown , E. de K. Leffingwell, 1911. Ignek Valley, south side of Red Hill. Lat 69 deg. 33'35" N., long 146 deg. 13' W. Probably same as loc. 23773. Dark shale. Ignek formation, upper shale unit of lower member, probbaly within 200 feet of base. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Spirorbis leffingwelli Imlay, n. sp.
Nuculana sp.
Yoldia cf. Y. kissoumi McLearn
Astarte ignekensis Imlay
Flaventia? sp.
Goniomya matonabbei McLearn
Thracia stelcki McLearn
Thracia cf. T. kissoumi McLearn
Myopholas sp.
Entolium? sp.
Anomia? sp.
Placunopsis sp.
Trochid gastropods.
Actaeon sp.
50AGr59 (Mesozoic loc. 23773) , Unknown , George Gryc, 1950. Ignek Creek, near Red Hill. Lat 69 deg. 38'35" N., long 146 deg. 13' W. Dark shale. Probbaly same as loc. 10293. Ignek formation, upper shale unit of lower member. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Spirorbis leffingwelli Imlay, n. sp.
Yoldia cf. Y. kissoumi McLearn
Astarte ignekensis Imlay, n. sp.
Thracia cf. T. kissoumi McLearn
Entolium? sp.
50AGr58 (Mesozoic loc. 23774) , Unknown , George Gryc, 1950. Ignek Creek, near Red Hill. Lat 69 deg. 33' N., long 146 deg. 13' W. Concretions derived from black shale. Ignek formation, upper shale unit of lower member. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Brachiopods undetermined
50AGr57 (Mesozoic loc. 23775) , Unknown , George Gryc, 1950. Ignek Creek, near Red Hill. Lat 69 deg. 33' N., long 146 deg. 13' W. Concretions in dark shale. Ignek formation, upper shale unit of lower member. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Goniomya matonabbei McLearn
117A (Mesozoic loc. 10311) , Unknown , E. de K. Leffingwell, 1911. Marsh Creek, east side. About 1 mile downstream from loc. 10312. Ignek formation, lower member. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Astarte ignekensis Imlay, n. sp.
Panope? elongatissima (McLearn)
118A (Mesozoic loc. 10312) , Unknown , E. de K. Leffingwell, 1911. Marsh Creek, bluff on northeast side. First large exposure of snadstone. Ignek formation, lower member. Albian. (description from Imlay, 1961, USGS Prof. Pap. 335, p. 30)
Astarte ignekensis Imlay, n. sp.
Arctica? sp.