Reference Detail of

Report on Referred Fossils
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Stratigraphic range: Triassic? and Jurassic
Kinds of fossils: Mollusks
Quadrangle or area: , Northwest side of Cook Inlet
Shipment No.: AF-50-33
Referred by: Hartsock, John K. , Grantz, Arthur
Report prepared by: Imlay, Ralph W.
Date: 02/13/1951

Examination has been made of the collections obtained by J.K. Hartsock's party during the field season of 1950 on Iniskin Peninsula and the area between Chinitna Bay and Tuxedni Bay.


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Brief statement of problem and remarks (from collector):
Date: Nov. 6, 1950
Region: Cook Inlet District: West Coast of Cook Inlet
Quadrangle: NW1/4 of NW1/4 of 585
Localities Iniskin-Chinitna Peninsula
Middle and Upper Jurassic
Party: Iniskin, 1950
Collectors: John K. Hartsock, Arthur Grantz, David M. Hill
Notebook reference: Hartsock, 1950
Information desired: Determination of species and age
User Note module to be added
50AGz3 , Iliamna , from west shore of Iniskin Bay (no further description provided in Imlay E&R report of Feb. 13, 1951; nothing given in transmittal sheet of Hartsock dated Nov. 6, 1950)
fragments of a large Monotis
49AHa1 (Mesozoic loc. 22552) , Iliamna , Tuxedni formation, Middle silstone member. South shore of Chinitna Bay near axis of Fitz Creek anticline (50 yds. east of pt. 37c) Iniskin Peninsula (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 111 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 48'39" N., 153 deg. 07'49" W.]
Normannites sp.
49AHa3 (Mesozoic loc. 22533) , Iliamna , Tuxedni formation, middle siltstone member. South shore of Chinitna Bay on axis of Fitz Creek anticline (80 yds. east of pt. 37c) Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 112 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 48'41" N., 153 deg. 07'16" W.]
Teloceras spp.
Chondroceras (Defonticeras) sp.
Phylloceras sp.
Belemnite ind.
Gastropods ind.
Inoceramus sp.
50AHa32 (Mesozoic loc. 22436) , Iliamna , Tuxedni formation, Bowser member. Pt. A13 on first tributary to Park Creek above its mouth. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Arctocephalites(?), Phylloceras(?) Pelecypods. Pt. A13 on first tributary to Park Cr. up from mouth. Bower member on map. 7/12/50"][Shown as locality 161 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 48'27" N., 153 deg. 04'50" W.]
Cranocephalites sp.
Xenocephalites? sp.
Phylloceras spp.
Chlamys (Camptochlamys) sp.
Oxytoma sp.
Pteroperna? sp.
Pinna sp.
Isocyprina? sp.
50AHa40 (Mesozoic loc. 22439) , Iliamna , Tuxedni formation, middle siltstone member. Pt. 69B on Fitz Creek south of mouth of Cliff Creek, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33) [Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Defonticeras(?). Pt. 69B, on Fitz Creek. S. of mouth of Cliff Creek. May be Cynthia Falls. 7/19/50"][Shown as locality 73 on Pl. 3 of Detterman and Hartsock, 1966]
Teloceras sp.
Stephanoceras sp.
50AHa41 (Mesozoic loc. 22441) , Iliamna , Tuxedni formation, middle siltstone member. Pt. A44 on Fitz Creek upstream from Cliff Creek, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33) [Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Defonticeras(?). Immature form. Pt. A44 on Fitz Cr. upstream from Cliff Cf. May be Middle Siltstone member. 7/19/50"][Shown as locality 73 on Pl. 3 of Detterman and Hartsock, 1966]
Chondroceras (Defonticeras) sp.
50AHa42 (Mesozoic loc. 22440) , Iliamna , Tuxedni formation, middle siltstone member. Pt. A43 on Fitz Creek at mouth of Forky Creek, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33) [Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Ammonites. Pt. A43 on Fitz Cr. at mouth Forky Cr. May be middle siltstone member. 7/19/50"][Shown as locality 73 on Pl. 3 of Detterman and Hartsock, 1966]
Stephanoceras sp.
Chondroceras (Defonticeras) sp.
50AHa57 (Mesozoic loc. 22537) , Iliamna , Tuxedni formation, probably Bowser member. Pt. 12F on first tributary to Portage Creek north from Right Arm of Iniskin Bay, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 151 on Pl. 3 of Detterman and Hartsock, 1966]
Ostrea sp.
Pleuromya sp.
50AHa60 (Mesozoic loc. 22534) , Iliamna , Tuxedni formation, middle siltstone member. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 102 on Pl. 3 of Detterman and Hartsock, 1966]
Chondroceras (Defonticeras) sp.
Inoceramus sp.
50AHa60a (Mesozoic loc. 22539) , Iliamna , Tuxedni formation, possibly Cynthia Falls member, Pt. 50 yds. southwest along bluff from pt. 12F, on first tributary to Portage Creek north from Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 152 on Pl. 3 of Detterman and Hartsock, 1966]
Inoceramus sp.
50AHa60b (Mesozoic loc. 22548) , Iliamna , Tuxedni formation, possibly Cynthia Falls member, Pt. about 50 yds. southwest along bluff from pt. 12F on first tributary to Portage Creek north of Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 153 on Pl. 3 of Detterman and Hartsock, 1966]
Chondroceras? sp.
Inoceramus sp.
Pleuromya sp.
50AGz8 (Mesozoic loc. 22444) , Iliamna , Tuxedni formation, middle silstone member, on stream tributary to Bowser Creek from west about 1 mile above junction, 0.7 mile S37E of hill 1160 (hill just southeast of large landslide), Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "On stream trib. to Bowser Ck. from the west. 0.7 mi. S37E hill 1160, S. Iniskin. Cynthia Falls member"][Shown as locality 123 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 41'37" N., 153 deg. 19'48" W.]
Ammonite fragment not determinable
50AGz82 (Mesozoic loc. 22529) , Seldovia , Tuxedni formation, lower silstone member, 5.5 miles S55E of Mt. Iliamna, north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33); [22529 Arthur Grantz, 1950. Lake Hickerson area, 5.3 miles S 55° E of peak of Mt. Iliamna. Siltstone about 300 feet below base of Gaikema sandstone member of the Tuxedni formation. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 22529. Orig. No. 50AGz82. Middle Jurassic, Tuxedni formation, lower part. 5.5 miles S55E of peak of Mt. Iliamna, Cook Inlet area, Alaska. Coll. by A. Grantz, 8/1/50 } [Note added to page margin: also 51AGz108 added for 1951 - ridge 2.1 miles N20W of head head of Lake Hickerson. Recollected by Grantz on July 31, 1951]
Leptosphinctes sp.
Stephanoceras sp.
50AGz83 (Mesozoic loc. 22528) , Iliamna , Tuxedni formation, lower or middle siltstone member, 6.0 miles S55E of peak of Mt. Iliamna north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 92 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 59'06" N., 152 deg. 56'08" W.]
Stephanoceras sp.
50AGz106 (Mesozoic loc. 22532) , Iliamna , Tuxedni Formation, Bowser member. On Horn Creek 0.5 mile north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 174 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 53'06" N., 153 deg. 04'28" W.]
Cranocephalites? sp.
Trigonia spp.
Tancredia sp.
Echinotis sp.
Belemnites ind.
50AHa4 (Mesozoic loc. 22424) , Iliamna , Probably Chinitna. Pt. 19E about 1/4 mile up Pomeroy Creek from mouth, irregularly-bedded sandstone, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Immature forms of ammonites. Pt. 19E, about 1/4 mile up Pomeroy Creek from mouth. Is it posible to determine if beds are Bowser or Tonnie from these fossils? 6/22/50. Irregularly-bedded silty sandstone."]
Ammonite fragment
50AHa6 (Mesozoic loc. 22414) , Iliamna , Pt. 1E about 1/3 mile up from mouth of Pomeroy Creek on east side of Iniskin Bay, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Pelecypods. Pt. 1E, about 1/3 mile up from mouth on Pomeroy Creek, East side of Iniskin Bay. Same sandstone as at 98D. 6/15/50"]
Lima (Plagiostoma) sp.
Trigonarca? sp.
50AHa10 (Mesozoic loc. 22416) , Iliamna , Probably Bowser member. On east side of Iniskin Bay about 1 mile north of the mouth of Keystone Creek, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Arctocephalites(?) or Cranocerphalites(?). Kirschner's Camp 2, E. side Iniskin Bay. Bowser sandstone. 6/17/50."][Shown as locality 190 of Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'57" N., 153 deg. 23'02" W.]
Cranocephalites? sp. juv.
Belemnite fragment
50AHa56 (Mesozoic loc. 22545) , Iliamna , Probably Bowser member. Pt. K126 on first tributary to Portage Creek north from Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 152 on Pl. 3 of Detterman and Hartsock, 1966]
Phylloceras sp.
50AHa61 (Mesozoic loc. 22547) , Iliamna , Pt. 42F on tributary to Brown Creek, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 181 on Pl. 3 of Detterman and Hartsock, 1966]
Inoceramus sp.
50AHa62 (Mesozoic loc. 22544) , Iliamna , Pt. 43F on tributary to Brown Creek from east, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 184 on Pl. 3 of Detterman and Hartsock, 1966]
Inoceramus sp.
Ammonite fragments
50AGz7 (Mesozoic loc. 22443) , Iliamna , Probably Bowser member. 2 1/2 miles N23E of Mt. Pomeroy, or 0.65 mile S6E of hill 1160 (hill just southeast of large landslie), southern part of Iniskin Peninsula. Coll. Grantz 6/15/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "2 1/2 mi. E 23 E Mt. Pomeroy, 0.65 mi. S 6 E hill 1160 (hill just southeast of large land slide) southern Iniskin, Bowser member"][Shown as locality 149 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 41'44" N., 153 deg. 20'40" W.]
Ammonite fragment
Camptonectes sp.
50AGz21 (Mesozoic loc. 22454) , Iliamna , Probably Bowser member. 0.95 miles N12 1/2 W of Peak 1750, Iniskin Peninsula. Coll. Grantz 6/28/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "0.95 N 121/2 W Pk 1750, S.W. Iniskin. Bowser member."][Shown as locality 170 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'21" N., 153 deg. 20'17" W.]
Cranocephalites? sp.
Lucina sp.
Inoceramus sp.
50AGz23 (Mesozoic loc. 22455) , Iliamna , Probably Bowser member. 1.15 miles N 23 1/2 W of Peak 1750, Iniskin Peninsula. Coll. Grantz 6/28/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "1.15 N 23 1/2 W pk. 1750, S.W. Iniskin. Bowser member."][Shown as locality 165 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'30" N., 153 deg. 20'29" W.]
Ammonite fragments
Pleuromya sp.
Inoceramus sp.
50AGz25 (Mesozoic loc. 22457) , Iliamna , Probably Chinitna formation. Stream forks 0.85 mile N26W of Peak 1750, Iniskin Peninsula. Coll. Grantz 6/28/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Stream forks 0.85 mi. N26W Pk. 1750, S.W. Iniskin. Prob. Bowser member."]
Procerites? sp.
50AGz104 (Mesozoic loc. 22530) , Iliamna , Probably Bowser member. Horn Creek 0.9 mile north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 183 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 53'12" N., 153 deg. 04'16" W.]
Cidarid echinoid fragment
50AGz105 (Mesozoic loc. 22531) , Iliamna , Horn Creek 0.8 mile north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 173 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 53'09" N., 153 deg. 04'21" W.]
Cranocephalites? sp.
Pleuromya sp.
50AHi9 (Mesozoic loc. 22550) , Iliamna , Probably Bowsher member. On Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 188 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 43'15" N., 153 deg. 20'49" W.]
Trigonia sp.
50AHa1 (Mesozoic loc. 22431) , Iliamna , Pt. 94D between mouths of Keystone and Pomeroy Creeks on east side of Iniskin Bay. From 10 feet of gray-weathering siltstone at beach level. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cranocephalites(?). Pt. 94D between mouths of Keystone and Pomeroy Creeks, E. side of Iniskin Bay. These specimens came from 10' of gray-weathering siltstone and sandstone at beach level; Tonnie or Bowser? 6/14/50."][Shown as locality 232 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'55" N., 153 deg. 23'14" W.]; [J. K. Hartsock, 1950. Iniskin Peninsula, from 10 ft of siltstone on beach between mouths of Keystone and Pomeroy Creeks 5.7 miles S. 69° W. of Front Mountain. Chinitna formation, middle of lower third. (description from Imlay, 1953, p. 68)]
Kepplerites ingrahami (McLearn)
Kepplerites n. sp.
Macrocephalites sp.
Kheraiceras sp.
Grossouvria cf. G. scintoi Gemmellaro
Grammatodon sp.
Belemnite fragments
50AHa1a (Mesozoic loc. 22412) , Iliamna , Pt. 94D between mouths of Keystone and Pomeroy Creeks on east side of Iniskin Bay. From 10 feet of red-brown weathering siltstone overlying gray siltstone at beach level. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cranocephalites(?). Pt. 94D between mourth of Keystone and Pomeroy Creeks. Specimens came from 10' of red-brown weathering siltstone overlying gray siltstone at beach level; Tonnie or Bowser?"][Shown as locality 232 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'55" N., 153 deg. 23'14" W.]
Macrocephalites sp.
Phylloceras sp.
50AHa2 (Mesozoic loc. 22432) , Iliamna , Sea cliff from 30 to 150 yds. south along beach from Pt. 95D on east side of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33) [Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cranocephalites(?) and pelecypod. Seacliff about 30 to 150 yards south along beach from Pt. 95D. This is mapped as Chinitna formation; what is Cranocephalites doing here? 6/14/50."][Shown as locality 238 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'49" N., 153 deg. 23'13" W.]; R. W. Juhle and R. D. Hoare, 1950. Iniskin Peninsula, sea cliff from 30 to 150 yd south- ward from Mes. loc. 22422 on east shore of Iniskin Bay. Chinitna formation, lower part of middle third. (description from Imlay, 1953, p. 68)]
Phylloceras sp.
Phylloceras (Partschiceras) sp.
Pseudocadoceras grewingki (Pompeckj)
Cadoceras catostoma Pompeckj
Cadoceras spp.
Cadoceras (Paracadoceras) sp.
Xenocephalites sp.
Kheraiceras spp.
Gowericeras sp.
Pleuromya sp.
Belemnite fragments
50AHa3 (Mesozoic loc. 22419) , Iliamna , Pt. 96D about 1/4 mile upstream on south side of Pomeroy Creek, east side of Iniskin Bay. From red-weathering siltstone. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Arctocephalites or Cranocephalites(?). Pt. 96D about 1/4 mile up stream just south of Pomeroy Creek, E. side Iniskin Bay. Red-weathering siltstone; not sure if Bowser, Tonnie, or Chinitna; according to Kirschner's map, should be Chinitna. 6/14/.50."][Shown as locality 245 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'53" N., 153 deg. 22'50" W.]; [R. W. Juhle, 1950. Iniskin Peninsula, mile up the stream just south of Pomeroy Creek, 5.42 miles S. 67° W. of Front Mountain. Chinitna formation, lower third. (description from Imlay, 1953, p. 69)]
Cadoceras catostoma Pompeckj
Phylloceras
Belemnite fragments
Pleuromya sp.
Grammatodon sp.
50AHa5 (Mesozoic loc. 22413) , Iliamna , Pt. 98D at mouth of Pomeroy Creek on east side of Iniskin Bay. From fine-grained sandstone on south side of stream. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Kepplerites(?) and pelecypods. Pt. 98D, at mouth of Pomeroy Creek, E. side of Iniskin Bay. Taken from outcrop of fine-cse. silty, dark sandstone on S. side stream. Bowser or possibly Tonnie; stratigraphic position determinable from fossils? 6/15[19/50."][Shown as locality 234 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'53" N., 153 deg. 23'14" W.]
Kepplerites abruptus (McLearn)
Inoceramus sp.
50AHa7 (Mesozoic loc. 22433) , Iliamna , Pt. 2E at mouth of first stream south of Pomeroy Creek on east side of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Kepplerites(?) and Cranocephalites(?). Pt. 2E, at mouth of first stream south of Pomeroy Cr., E. side Iniskin Bay. 6/14/50, 6/15/50, 6/18/50. Mapped as Chinitna fmn."][Shown as locality 236 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'53" N., 153 deg. 23'16" W.]; [J. K. Hartsock, 1950. Iniskin Peninsula, at mouth of first creek south of Pomeroy Creek, 5.5 miles S. 69° W. of Front Mountain. Chinitna formation, middle of lower third. (description from Imlay, 1953, p. 68)]
Cadoceras spp.
Kheraiceras spp.
Kepplerites n. sp.
Kepplerites abruptus (McLearn)
Kepplerites aff. K. gitinsi (McLearn)
Belemnite fragment
50AHa8 (Mesozoic loc. 22411) , Iliamna , Float in stream bed a little above Pt. 96D in first stream south of Pomeroy Creek. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Piece of fossiliferous float in stream bed little above 96D, first stream S. of Pomeroy Cr. Probably comes from massive sandstone bed about 1/4 mile further up stream. Is age determination possible? The red-weathering siltstone at 96D may be Bowser, Tonnie, or Chinitna. 6/14/50."][Shown as locality 250 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'57" N., 153 deg. 22'23" W.]; [J. K. Hartsock, 1950. Iniskin Peninsula, float in first stream south of Pomeroy Creek, 5.4 miles S. 67° W. of Front Mountain. Chinitna formation, lower third. (description from Imlay, 1953, p. 69)]
Cadoceras wosnessenskii (Grewingk)
Phylloceras (Partschiceras) subobtusiforme (Pompeckj)
Camptonectes sp.
Brachiopod undetermined
50AHa9 (Mesozoic loc. 22417) , Iliamna , North slope of Mt. Pomeroy about 300 feet stratigraphically below base of Chisik conglomerate. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Immature forms of Pseudocadoceras(?). North slope Mt. Pomeroy, about 300 feet stratigraphically below base of Chisik conglomerate. Col. at pt. 25E, in Chinitna fmn. 6/22/50."][Shown as locality 285 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'42" N., 153 deg. 22'21" W.]
Phylloceras sp.
Cadoceras sp.
Pseudocadoceras grewingki (Pompeckj)
Pleuromya sp.
50AHa11 (Mesozoic loc. 22422) , Iliamna , Pt. 95D on sea cliff south of Pomeroy Creek on east side of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cadoceras. Pt. 95D on seacliff S. of Pomeroy Cr., E. side Iniskin Bay. Chinitna fmn. 6/18/50][Shown as locality 242 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'43" N., 153 deg. 23'25" W.]; [J. K. Hartsock, 1950. Iniskin Peninsula, talus from sea cliff 5.62 miles S. 67° W. of Front Mountain. Chinitna formation, lower part of middle third. (description from Imlay, 1953, p. 68)]
Cadoceras sp.
50AHa13 (Mesozoic loc. 22428) , Iliamna , At Pt. 5E on reef just off Pt. 94D between Keystone Creek and Pomeroy Creek on east side of Iniskin Bay. Probably correlates with brown weathering siltstone on beach at Pt. 94D. Coll. Hartsock 6/19/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cranocephalites(?) and Arctocephalites(?), and Inoceramus. Pt. 5E, on reef just offshore mouths of Keystone Cr. and Pomeroy Cr., E. side Iniskin Bay. Probably correlates with brown-weathering siltstone above beach level at 94D. 6/19/50."][Shown as locality 229 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'57" N., 153 deg. 23'18" W.]; [J. K. Hartsock, 1950. Iniskin Peninsula, reef between mouths of Keystone Creek and Pomeroy Creek, 5.6 miles S. 70° W. of Front Mountain. Chinitna formation, near middle of lower third. (description from Imlay, 1953, p. 68)]
Kheraiceras sp.
Phylloceras (Calliphylloceras) sp.
Inoceramus sp.
50AHa14 (Mesozoic loc. 22434) , Iliamna , Alongshore reef between Pts. 12E and 13E. From upper 100 feet of gray siltstone with calcareous layers underlying massive sandstone bed at top of Chinitna formation. East side of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cadoceras and Pseudocadoeras(?). Alongshore reef between Pts. 12E and 13E. Upper 100' of gray siltstone with limy layers underlying massive sandstone bed at top of Chinitna formation, East side of Iniskin Bay. 6/20/50."][Shown as locality 289 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'32" N., 153 deg. 23'53" W.]; [A. Grantz and J. K. Hartsock, 1950. Iniskin Peninsula, 5.9 miles S. 67° W. of Front Mountain on east shore of Iniskin Bay. Chinitna formation, from 100 ft of siltstone lying 200 ft below top. (description from Imlay, 1953, p. 69)]
Cadoceras spp.
Phylloceras n. sp.
Phylloceras (Partschiceras) subobtusiforme (Pompeckj)
Xenocephalites sp.
Lilloettia sp.
Pleuromya sp.
Goniomya sp.
Oxytoma sp.
50AHa15 (Mesozoic loc. 22435) , Iliamna , From massive sandstone at top of Chinitna formation on east side of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cadoceras and Pseudocadoceras(?). South along beach 200 yards from Pt. 13E, E. side of Iniskin Bay. Col. from massive sandstone bed at top of Chinitna formation. 6/20/50."][Shown as locality 280 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'20" N., 153 deg. 24'20" W.]; A. Grantz and J. K. Hartsock, 1950. Iniskin Peninsula, 6.25 miles S. 66° W. of Front Mountain on east shore of Iniskin Bay. Chinitna formation, upper 200 ft. (description from Imlay, 1953, p. 69)]
Cadoceras doroschini (Eichwald)
Cadoceras wosnessenskii (Grewingk)
Cadoceras n. spp.
Pseudocadoceras grewingki (Pompeckj)
Phylloceras (Partschiceras) sp.
Astarte sp.
50AHa17 (Mesozoic loc. 22415) , Iliamna , Pt. 27E on north slope of Mt. Pomeroy about 300 feet stratgraphically below base of Chisik conglomerate. [Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Pseudocadoceras. North slope of Mt. Pomeroy about 300' stratigraphically below base of Chisik conglomerate. Collected at Pt. 27E in Chinitna formation. 6/22/50."][Shown as locality 284 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'39" N., 153 deg. 22'07" W.]; [A. Grantz, 1950. Iniskin Peninsula, north slope of Mt. Pomeroy, 5 miles S. 63° W. of Front Mountain, Chinitna formation, 300 ft below top. (description from Imlay, 1953, p. 69)]
Cadoceras aff. C. nikitini Sokolov
50AHa18 (Mesozoic loc. 22423) , Iliamna , Pt. 31E near mouth of Bowser Creek on west side of Oil Bay, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Belemnites. Pt. 31E, near mouth of Bowser Creek, West side Oil Bay. Chinitna formation. 6/26/50."][Shown as locality 260 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'57" N., 153 deg. 19'12" W.]
Belemnites
Oxytoma sp.
Camptonectes sp.
50AHa20 (Mesozoic loc. 22429) , Iliamna , Pt. K.39 near mouth of Bowser Creek on west side of Oil Bay, Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Pseudocadoceras(?). Pt.K39 (Kirschner's point), near mouth Bowser Creek, west side Oil Bay. Chinitna formation. 6/26/50."][Shown as locality 267 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'45" N., 153 deg. 18'53" W.]; [R. Hoare, R. W. Juhle, J. K. Hartsock, 1950. Iniskin Peninsula, west side of Oil Bay 3.6 miles S. 53° W. of Front Mountain, Chinitna formation, near base of upper third. (description from Imlay, 1953, p. 68)
Cadoceras sp.
Pseudocadoceras grewingki (Pompeckj)
Belemnite fragments
Pleuromya sp.
Grammatodon sp.
50AHa22 (Mesozoic loc. 22425) , Iliamna , Pt. 35E on east side of Bowser Creek valley below Front Mountain. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Ammonite. Pt. 35E, east side of Bowser Creek valley, below Front Mountain. Not sure if Tonnie or Chinitna siltstone. 6/27/50."][Shown as locality 255 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'47" N., 153 deg. 16'18" W.]; [R. W. Juhle, 1950. Iniskin Peninsula, east side of valley of 'Bowser Creek 1.4 miles S. 61° W. of Front Mountain. Chinitna formation, base of middle third. (description from Imlay, 1953, p. 68)]
Cadoceras sp.
50AHa23 (Mesozoic loc. 22430) , Iliamna , Pt. 37E below Front Mountain. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Ammonites. Pt. 37E, below Front Mountain. Chinitna or Tonnie Siltstone? 6/27/50."][Shown as locality 268 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'37" N., 153 deg. 16'19" W.]; [R. W. Juhle and J. K. Hartsock, 1950. Iniskin Peninsula, 1.5 miles S. 59° W. of Front Mountain. Chinitna formation, base of middle third. (description from Imlay, 1953, p. 68)]
Cadoceras (Paracadoceras) catostoma Pompeckj
Oxycerites sp.
50AHa25 (Mesozoic loc. 22427) , Iliamna , Pt. K49 on east side of Bowser Creek valley below Front Mountain. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Arctocephalites(?). Base of Tonnie(?) below Front Mt., East side Bowser Creek valley, Pt. K49 (Kirschner's pt.) 6/28/50."][Shown as locality 210 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 41'40" N., 153 deg. 15'52" W.]; [R. W. Juhle and J. K. Hartsock, 1950. Iniskin Peninsula, east side of valley of Bowser Creek 0.9 mile S. 87° W. of Front Mountain. Chinitna formation, basal sandstone. (description from Imlay, 1953, p. 68)]
Phylloceras (Calliphylloceras) sp.
Kheraiceras spp.
Belemnite fragments
Inoceramus sp.
50AHa30 (Mesozoic loc. 22421) , Iliamna , Pt. A33 on first creek entering Chinitna Bay east of Park Creek. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Ammonites. Point A33 on first creek entering Chinitna Bay east of Park Creek. Chinitna or Tonnie siltstone? July 9, 1950."][Shown as locality 226 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 48'56" N., 153 deg. 03'27" W.]; [D. M. Hill and A. Grantz, 1950. Iniskin Peninsula, first creek entering Chinitna Bay east of Park Creek, 3.08 miles N. 80 ° E. of dock at mouth of Fitz Creek. Chinitna formation, top of lower third. (description from Imlay, 1953, p. 66)]
Cadoceras wosnessenskii (Grewingk)
50AHa31 (Mesozoic loc. 22420) , Iliamna , Pt. A32 on first creek entering Chinitna Bay east of Park Creek. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Ammonites. Pt. A32 on first creek entering Chinitna Bay east of Park Creek. Chinitna or Tonnie siltstone?"][Shown as locality 219 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 48'58" N., 153 deg. 03'30" W.]
Xenocephalites sp. juv.
Kheraiceras sp. juv.
Belemnites
Grammatodon sp.
Astarte sp.
Entolium sp.
Oxytoma sp.
50AHa34 (Mesozoic loc. 22437) , Iliamna , Brown weathering siltstone about 100 yds. upstream from A10 on same side of stream, first tributary to Park Creek above its mouth. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Arctocephalites(?). Brown-weathering siltstone outcrop about 100 yd. upstream from A10, same side stream, on first trib. to Park Cr. up from mouth. Bowser or Tonnie? 7/12, 13,/50"][Shown as locality 207 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 48'21" N., 153 deg. 03'58" W.]; [J. K. Hartsock, 1950. Iniskin Peninsula, 2.15 miles S. 88° E. of dock at mouth of Fitz Creek. Chinitna formation, basal sandstone. (description from Imlay, 1953, p. 66)]
Cadoceras catostoma Pompeckj
Cadoceras sp.
Xenocephalites sp.
50AHa36 (Mesozoic loc. 22438) , Iliamna , Pt. 85E on first tributary to Park Creek above its mouth. One Cadoceras in place 40 feet stratigraphically below top of massive sandstone. The other ammonites from talus at base of cliffs below Pt. 85E. Coll. Hartsock 7/13/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cadoceras, Arctocephalites(?) Pelecypod. One Cadoceras in place 40' stratigraphically below top ???? ss. marking top of Bowser, Pt. 85E on frist trib. to Park Cr. up from mouth. Other Cadoceras and Arctocephalites(?) from talus at base of cliff below Pt. 85E. 7/13/50"][Shown as locality 206 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 48'22" N., 153 deg. 04'00" W.]; [ J. K. Hartsock, 1950. Iniskin Peninsula, 2.15 miles S. 86° E. of dock at mouth of Fitz Creek. Massive sandstone at base of Chinitna formation. (description from Imlay, 1953, p. 66)]
Cadoceras sp.
Xenocephalites sp.
Pleuromya sp.
50AHa49 (Mesozoic loc. 22558) , Iliamna , Pt. 89E on synclinal axial stream entering Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 208 on Pl. 3 of Detterman and Hartsock, 1966]
Cadoceras sp.
Grammatodon sp.
Volsella sp.
50AHa63 (Mesozoic loc. 22549) , Iliamna , Pt. 44F on tributary to Brown Creek from east. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 180 on Pl. 3 of Detterman and Hartsock, 1966]
Kepplerites sp.
Belemnites ind.
50AHa65 (Mesozoic loc. 22541) , Iliamna , Pt. 16F on Brown Creek. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 265 on Pl. 3 of Detterman and Hartsock, 1966]
Kepplerites sp.
50AHa69 (Mesozoic loc. 22554) , Kenai , Pt. 3G on northwest side of Chisik Island just below Chisik conglomerate. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 281 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 60 deg. 07'13" N., 152 deg. 35'33" W.]; [Arthur Grantz, 1950. Chisik Island, west shore, near top of Chinitna formation. (description from Imlay, 1953, p. 65)]
Phylloceras sp.
50AHa70 (Mesozoic loc. 22543) , Kenai , Point A72 on northwest side of Chisik Island just southeast of conglomerate point. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 221 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 60 deg. 09'27" N., 152 deg. 38'04" W.]
Oxycerites sp.
Inoceramus sp.
50AHa71 (Mesozoic loc. 22535) , Kenai , Pt. 8G on creek east of Bear Creek on south side of Tuxedni Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)
Inoceramus sp.
Pleuromya sp.
50AHa72 (Mesozoic loc. 22546) , Kenai , Pt. 9G on creek east of Bear Creek on south side of Tuxedni Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)
Lilloettia cf. L. lilloetensis Crickmay
50AGz9 (Mesozoic loc. 22445) , Iliamna , 300 yards north of Keystone Creek (3rd stream north of Mt. Pomeroy) on east shore of Iniskin Bay. Coll. by Grantz, 6/18/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "300 yds. N. of Keystone Ck. (3rd stream N of Mt. Pomeroy) along E. shore of Iniskin Bay. Bowser member."][Shown as locality 203 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'12" N., 153 deg. 23'15" W.]
Kheraiceras sp.
Phylloceras sp.
Belemnite undetermined
gastropods undetermined
Pinna sp.
Pleuromya sp.
Trigonia sp.
Isocyprina sp.
50AGz10 (Mesozoic loc. 22446) , Iliamna , 250 yards north of Keystone Creek along east shore of Iniskin Bay. Coll. Grantz 6/18/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "250 yds. N Keystone Ck. along E. Shore Iniskin Bay. Bowser member."][Shown as locality 203 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'12" N., 153 deg. 23'15" W.]; [A. Grantz, 1950. Iniskin Peninsula, 250 yd north of mouth of Keystone Creek, 5.45 miles S. 72° W. of Front Mountain. Chinitna formation, basal beds. (description from Imlay, 1953, p. 68)]
Kheraiceras sp.
Procerites sp.
50AGz11 (Mesozoic loc. 22447) , Iliamna , 200 yards north of Keystone Creek along east shore of Iniskin Bay. Coll. by Grantz 6/18/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "200 yds. N. Keystone Ck. along E. shore Iniskin Bay. Bowser member."][Shown as locality 203 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'12" N., 153 deg. 23'15" W.]
Kepplerites sp.
gastropods undetermined
50AGz12 (Mesozoic loc. 22448) , Iliamna , From Keystone Creek northward 175 yards to gouge zone along east shore of Iniskin Bay. Coll. Grantz 6/19/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "0-175 yds. N. Keystone Ck. along E. shore Iniskin Bay. Bowser member."][Shown as locality 211 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'03" N., 153 deg. 23'16" W.]; [A. Grantz, 1950. Iniskin Peninsula, from mouth of Keystone Creek northward 175 yd, 5.5 miles S. 70° W. of Front Mountain. Chinitna formation, near base. (description from Imlay, 1953, p. 68)]
Phylloceras (Macrophylloceras)
Procerites sp.
Kheraiceras sp.
Lima (Plagiostoma) sp.
50AGz18 (Mesozoic loc. 22451) , Iliamna , 0.5 mile N.15E. of Peak 1750 (which is 8,000 feet east of Mt. Pomeroy), just west of head of Oil Bay. Coll. Grantz 6/27/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "0.5 mi. N15E Pk. 1750, first gully W. camp 2, Oil Bay. Chinitna formation (Pk. 1750 is 8000' E. of Mt. Pomeroy."][Shown as locality 271 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'45" N., 153 deg. 19'17" W.]; [ A. Grantz, 1950. Iniskin Peninsula, west of head of Oil Bay, 3.75 miles S. 55° W. of Front Mountain, Chinitna formation, near base of upper third. (description from Imlay, 1953, p. 68)]
Cadoceras spp.
Pseudocadoceras grewingki (Pompeckj)
Phylloceras sp.
Belemnite
Grammatodon sp.
50AGz19 (Mesozoic loc. 22452) , Iliamna , 0.55 mile N6W of Peak 1750 just west of head of Oil Bay. Coll. by Grantz 6/27/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "0.55 mi. N6W Pk. 1750 second gully W. camp 2, Oil Bay. Chinitna formation."][Shown as locality 266 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'53" N., 153 deg. 19'38" W.]; [A. Grantz, 1950. Iniskin Peninsula, 3.8 miles S. 56° W. of Front Mountain. Chinitna formation, near base of upper third. (description from Imlay, 1953, p. 68)]
Cadoceras sp.
Pseudocadoceras grewingki (Pompeckj)
Brachiopod
Isocyprina sp.
50AGz20 (Mesozoic loc. 22453) , Iliamna , 0.7 mile N36W of Peak 1750, west of head of Oil Bay. Coll. by Grantz 6/27/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "0.7 mi. N36W Pk. 1750, S.W. Iniskin. Lower Chinitna or Tonnie?"][Shown as locality 227 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'07" N., 153 deg. 20'11" W.]
Phylloceras sp.
Kepplerites sp. juv.
Belemnites
Pinna sp.
Grammatodon sp.
50AGz24 (Mesozoic loc. 22456) , Iliamna , 1.0 miles N33W of Peak 1750, west of head of Oil Bay. Coll. by Grantz 6/28/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "1.0 mi. N33W Pk. 1750, S.W. Iniskin. Tonnie or Bowser?"][Shown as locality 197 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 40'11" N., 153 deg. 20'58" W.]
Kepplerites cf. K. abruptus (McLearn)
Phylloceras (Calliphylloceras) sp.
50AGz28 (Mesozoic loc. 22458) , Iliamna , 2.2 miles N 23 1/2 W of Mt. Chinitna. Coll. by Grantz 7/8/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "2.2 mi. N 23 1/2 W Mt. Chinitna. Top of L. Chinitna formation."][Shown as locality 301 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 49'36" N., 153 deg. 02'26" W.]
Cadoceras sp.
50AGz100 (Mesozoic loc. 22524) , Iliamna , Horn Creek 1.6 miles north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 299 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 53'32" N., 153 deg. 03'44" W.]
Cadoceras (Paracadoceras) sp.
50AGz101 (Mesozoic loc. 22525) , Iliamna , Horn Creek 1.4 miles north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 300 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 53'30" N., 153 deg. 03'54" W.]
Cadoceras sp.
50AGz102 (Mesozoic loc. 22526) , Iliamna , Horn Creek 1.3 miles north of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 298 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 53'22" N., 153 deg. 03'52" W.]
Cadoceras sp.
Lilloettia? sp.
50AGz103 (Mesozoic loc. 22527) , Iliamna , Horn Creek 1.2 miles of Chinitna Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 247 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 53'25" N., 153 deg. 04'00" W.]
Grammatodon sp.
Belemnites ind.
50AHi5a (Mesozoic loc. 22538) , Iliamna , K110 on Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 182 on Pl. 3 of Detterman and Hartsock, 1966]
Oppelia (Oxycerites) sp.
50AHi5b (Mesozoic loc. 22536) , Iliamna , K.110 Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 182 on Pl. 3 of Detterman and Hartsock, 1966]
Kheraiceras sp.
50AHi5c (Mesozoic loc. 22557) , Iliamna , Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)
Kepplerites sp.
50AHi5d (Mesozoic loc. 22540) , Iliamna , Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)
Xenocephalites sp.
Kepplerites sp.
Pleuromya sp.
50AHi5e (Mesozoic loc. 22555) , Iliamna , From beach cobble, Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)
Pseudocadoceras grewingki (Pompeckj)
50AHi6 (Mesozoic loc. 22553) , Iliamna , Right Arm of Iniskin Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 168 on Pl. 3 of Detterman and Hartsock, 1966]
Kepplerites sp.
Pleuromya sp.
50AHi10 (Mesozoic loc. 22559) , Iliamna , Float 50 yards upstream from K121. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Shown as locality 198 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 42'39" N., 153 deg. 21'14" W.]; [David Hill, 1950. Iniskin Peninsula, 4.4 miles N. 63° W. of Front Mountain. Float near base of Chinitna formation. (description from Imlay, 1953, p. 68)]
Kepplerites abruptus (McLearn)
50AHi13 (Mesozoic loc. 22442) , Iliamna , Pt. 28 on tributary from west to Brown Creek about 3 miles above its mouth. Sandstone probably at top of Bowser. Coll. by Hill 8/11/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Ammonites, pelecypods, Pt. 28 on tributary to Brown C. from W. about 3 miles up from north. Sandstone outcrop, probably top of Bowser member. 8/11/50."][Shown as locality 205 on Pl. 3 of Detterman and Hartsock, 1966]; [D. M. Hill, 1950. Iniskin Peninsula, 2.8 miles N. 35° E. of Front Mountain. Chinitna formation, near base of middle third. (description from Imlay, 1953, p. 67)]
Phylloceras (Macrophylloceras) sp.
Lilloettia lilloetensis Crickmay
Ostrea sp.
Pleuromya sp.
Camptonectes sp.
50AHa21 (Mesozoic loc. 22418) , Iliamna , About 50 feet above base of Naknek formation on west side of Oil Bay. Coll. by Hartsock 6/26/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cardioceras(?). Pt. K33 (Kirschner's point) on west side Oil Bay. About 50' above base of Naknek. 6/26/50. Banded sandstone."][Shown as locality 303 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'14" N., 153 deg. 18'24" W.]; R. D. Hoare and J. K. Hartsock, 1950. West shore of Oil Bay, NE cor. SE1/4SE1/4 sec. 14, T. 6 S.. R. 24 W., Iliamna (C-1) Quadrangle, west of Cook Inlet, southern Alaska. Naknek Formation, about 15 m above base of unnamed lower sandstone member. Early Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 26); [Entry in USGS Mesozoic Catalogue (Washington, D.C.): 50AHa21 Upper Jurassic. Naknek fm. + or - 50 feet base of Naknek fm. on west side of Oil Bay at Pt.K.33. Coll. by Hartsock and Grantz, June 22, 1950.]
Cardioceras (Scarburgiceras) martini Reeside
Lytoceras sp.
Pleuromya sp.
Isocyprina? sp.
50AHa21a (Mesozoic loc. 22426) , Iliamna , About 200 yards south along beach from loc. 50AHa21 in lower member of Naknek on west side of Oil Bay. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Cardioceras. 200 yards south along beach from Pt. K33, west side Oil Bay. Lower member Naknek. 6/26/50. Banded sandstone."][Shown as locality 307 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 39'08" N., 153 deg. 18'17" W.]; R. D. Hoare and J. K. Hartsock, 1950. West shore of Oil Bay, about 213 m south of USGS Mesozoie loc. 22418 and 427 m south of first major point down bay from gravel spit near mouth of Bowser Creek. SE corner SE1/4 sec. 14, T. 6 S., R. 24 W., Iliamna (C-1) Quadrangle, west of Cook Inlet. Naknek Formation, 48 m above base of unnamed lower sandstone member. Early Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 26); [Entry in USGS Mesozoic Catalogue (Washington, D.C.): 50AHa21a Upper Jurassic, Naknek fm. Lower member, 200 yards south of Pt. K.33 on west side of Oil Bay. Coll. Hoare and Hartsock, June 26, 1950.]
Cardioceras (Scarburgiceras) martini Reeside
Pleuromya sp.
Quenstedtia sp.
Cyprina? sp.
Grammatodon? sp.
Oxytoma sp.
Thracia sp.
Echinotis sp.
50AGz15 (Mesozoic loc. 22449) , Iliamna , About 40 feet below top of upper siltstone member of Naknek formation from cove just northeast of Scott Island on southwest tip of Iniskin Peninsula. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "On shore of Iniskin Bay just N.E. of Scott Island S.W. tip of Iniskin Peninsula. U. Siltstone member of Naknek."][Shown as locality 314 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 38'45" N., 153 deg. 25'02" W.]; Arthur Grantz, 1950. East shore of Iniskin Bay northeast of Scott Island on southwest tip of Iniskin Peninsula, NE1/4 sec. 19, T. 6 S., R. 24 W., Iliamna (C-2) Quadrangle west of Cook Inlet, southern Alaska. Naknek Formation, 198-206 m above base and 12 m below top of Snug Harbor Siltstone Member. Late Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 26); [Entry in USGS Mesozoic Catalogue (Washington, D.C.): 50AGz15, Upper Jurassic, 40' below top of siltstone member of Naknek fm. from cove on east shore of Iniskin Bay just N.E. of Scott Island on southwest tip of Iniskin Peninsula. Coll. by Grantz 6/19/50]
Perisphinctes sp.
Aucella sp.
Goniomya sp.
Astarte sp.
50AGz16 (Mesozoic loc. 22450) , Iliamna , From lower siltstone member of Naknek formation just northeast of Scott Island at southwest tip of Iniskin Peninsula. Coll. by Grantz 6/21/50. (description from Imlay E&R report of Feb. 13, 1951; Shipment AF-50-33)[Transmittal sheet of Hartsock, dated Nov. 6, 1950 provides this description: "Same as 15. L. Sts. member Naknek."][Shown as locality 311 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 59 deg. 38'58" N., 153 deg. 24'59" W.]; Arthur Grantz, 1950. East shore of Iniskin Bay in NE cor. NE1/4 sec. 19, T. 6 S., R. 24 W., about 0.3 km north of Mesozoie loc. 22449 in Iliamna (C-2) Quadrangle. Naknek Formation, 61-69 m above base of Snug Harbor Siltstone Member. Late middle to late Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 26); [Entry in USGS Mesozoic Catalogue (Washington, D.C.): 50AGz16, Upper Jurassic, siltstone member of Naknek fm., from lower part of member, from cove on east shore of Iniskin Bay N.E. of Scott Island on southwest tip of Iniskin Peninsula. Coll. by Grantz 6/21/50]
Phylloceras sp.
Aucella cf. A. bronni (Rouiller)