| PUBLICATION |
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Authors: |
Imlay, Ralph W.
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| Editors: |
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| Date: |
/1961 |
| Title: |
New genera and subgenera of Jurassic (Bajocian) ammonites from Alaska |
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35 , 3 , 467-474, |
| Host: |
Journal of Paleontology : |
| Document Type: |
Article\Abst.\Chapter\report |
| Annotation: |
ABSTRACT-New genera and species of Bajocian ammonites from Alaska include
Megasphaeroceras rotundum Imlay, Dettermanites vigorosus Imlay, and Parabigotites
crassicostatus Imlay. A new subgenus and species is Oppelia (Liroxyites) kellumi
Imlay. Of these Megasphaeroceras, Dettermanites and Oppelia (Liroxyites) are associated
with Spiroceras? Leptosphinctes, and Sphaeroceras of late Bajocian age. Parabigotites is associated with Stephanoceras, Otoites, Sonninia, Witchellia and
Lissoceras of middle Bajocian age. |
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13Am21
(Mesozoic loc. 8572)
, Anchorage
, G.C. Martin, 1913. Talkeetna Mountains at altitude of 4,200 ft. (1,280 m) on ridge west of creek that enters main Boulder Creek from north, 3 miles (4.8 km) above its junction with the East Fork. Probably from west-central part of sec. 2, T. 21 N., R. 17 E., Anchorage (D-4) quadrangle. Tuxedni Group in beds equivalent to the Twist Creek Siltstone west of Cook Inlet. (description from Imlay, 1982, p. 12); [8572 G. C. Martin, 1913. Talkeetna Mountains at altitude of 4200 feet on ridge west of creek that enters the main Boulder Creek from the north 3 miles above its junction with the East Fork. Tuxedni formation equivalent. (description from Imlay , 1961, p. 468)]; [USGS Mes. Cat.: 8572. Orig. No. 21. Middle Jurassic. Elev. 4200 on ridge W. of tributary to Boulder Creek from north, 1 mile below camp Aug. 18, 1913. Upper Matanuska Valley. Alaska. Coll. G.C. Martin, Aug. 18, 1913.]
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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21ABF-42
(Mesozoic loc. 11034)
, Iliamna
, A.A. Baker, 1921. Iniskin Peninsula, on right fork of Cliff Creek about 2,700 ft (823 m) above junction with left fork and 2.46 miles (4 km) S. 15 deg. W. of mouth Fitz Creek, Twist Creek Siltstone, about 100 ft (30.5 m) above base. (description from Imlay, 1982, p. 13); 11034 A. A. Baker, 1921. Insikin Peninsula on right fork of Cliff Creek 2.46 miles S. 15.5° W of mouth of Fitz Creek. Bowser
member of Tuxedni formation about 100 feet above base. (description from Imlay, 1961, p. 468)]; [USGS Mes. Cat.: 11034. Orig. No. ABF-42. Small creek branching off to south from Fitz Creek 1 1/3 miles below camp no. 3 or about 1 2/3 miles up Fitz Creek from Chinitna Bay. This fossil was found about 2700 feet up this creek (up right fork), Peninsula between Chinitna Bay and Iniskin Bay, Cook Inlet, Alaska. Tuxedni Formation. Coll. A.A. Baker. July 23, 1921 for F.H. Moffit.]
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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21ABF-44
(Mesozoic loc. 11035)
, Iliamna
, A.A. Baker, 1921. Iniskin Peninsula, on right fork of right fork of Cliff Creek about 9,000 ft (2,743 m) above junction with Fitz Creek and 2.68 miles (4.2 km) S. 16 deg. W. of mouth of Fitz Creek. Twist Creek Siltstone, lower part. (description from Imlay, 1982, p. 13); [11035 A. A. Baker, 1921. Iniskin Peninsula on right fork of Cliff Creek 2.68 miles S 16° W of mouth of Fitz Creek. Bowser member of Tuxedni formation, lower part. (description from Imlay, 1961, p. 468)]; [USGS Mes. Cat.: 11035. Orig. No. ABF-44. Tuxedni formation. Fossil found about 9000 up creek described in ABF-42. This is on right? fork of both fork of both branches of creek. Peninsula between Chinitna Bay & Iniskin Bay. Cook Inlet Alaska. Coll. A.A. Baker, July 29, 1021, for F.H. Moffit.]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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21ABF-43
(Mesozoic loc. 11036)
, Iliamna
, A.A. Baker, 1921, Iniskin Peninsula, on right fork of Cliff Creek about 8,000 ft (2,438 m) above junction with Fitz Creek and 2.58 miles (4 km) S. 15 deg. W. of mouth of Fitz Creek. Twist Creek Siltstone, 125-175 ft. (38-53 m) above base. (description from Imlay, 1982, p. 13); [11036 A. A. Baker, 1921. Iniskin Peninsula on right fork of Cliff Creek 2.58 miles S 15° W of mouth of Fitz Creek. Bowser
member of Tuxedni formation, 125 to 175 feet above base. (description from Imlay, 1961, p. 468)]; [USGS Mes. Cat.: 11036. Orig. No. ABF-43. About 8000 feet up little creek described under ABF-42, Peninsula between Chinitna Bay and Iniskin Bay, Cook Inlet, Alaska. Tuxedni sandstone. Coll. A.A. Baker, July 24, 1921, for F.H. Moffit.]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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15 of W.R. Smith, July 12, 1922
(Mesozoic loc. 11352)
, Ugashik
, 11352 W. R. Smith, 1922. Wide Bay, 1 mile up creek southwest of Short Creek. Kialagvik formation, upper part. (description from Imlay, 1961, p. 468); [USGS Mes. Cat.: 11352. Orig. No. 15. Middle Jurassic. Wide Bay, one mile up creek SW. of Short Creek, Alaska. Coll. W.R. Smith, July 12, 1922.]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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F-26 of W.R. Smith, 1924
(Mesozoic loc. 12404)
, Ugashik
, 12404 W. R. Smith, 1924. Wide Bay, southeast side of head. Kialagvik formation, upper part. (description of Imlay, 1961, p. 468); [USGS Mes. Cat.: Orig. No. F-26. S.E. side of head of Wide Bay. Cold Bay District, Alaska Peninsula, Alaska. Coll. Walter R. Smith; August 4, 1924]
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Parabigotites crassicostatus Imlay n. gen., n. sp.
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44AKmF43
(Mesozoic loc. 19773)
, Ugashik
, 19773 L. B. Kellum, 1944. Wide Bay, 6.21 miles S 88° W of west end of Hartman Island. Kialagvik formation, about 225 feet below top. (description from Imlay, 1961, p. 468); [USGS Mes. Cat.: 19773. orig. no. 44AKmF43. Jurassic - Kialagvik S.W. Alaska, Kanatak District, Wide Bay Area. Knob on right side of Anderson Creek about 1 mile upstream from its mouth, where stream makes a sharp bend to the south or 6.5 miles N88° W of west end of Hartman Island. Same locality as USGS Mesozoic loc. No. 21258 (48AI96, A to G See Insert for further details. Strat. about 220 ft below top of Kialagvik Fm. Coll. Kellum 44 NB 1, p. 47 & 48 July 31, 1944] [Note discrepancy between azimuth reading in Imlay and Detterman, 1973 and in USGS Mes. Catalogue]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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44AKmF66
(Mesozoic loc. 19796)
, Ugashik
, 19796 S. N. Daviess, 1944. Wide Bay. Float from bluff along southeast shore, 4 miles S 74 1/2° E of Mt. Alai. Kialagvik formation, upper part. (description from Imlay, 1961, p. 468); [USGS Mes. Cat.: 19796. Orig. no. 44AKmF66. Jurassic=Kialagvik. SW Alaska, Kanatak District, Wide Bay area. Float from bluff along the SE shore of Wide Bay and 4 miles S74 1/2° E of Mt Alai. Strat. pos. about ---- (nothing listed) ft below top of Kialagvik with 75 ft cliff capped by conglomerate, the cliff composed mainly of med. grained greenish gray sandstone Platy to massive Cob 1/2 from cg & 1/2 from ss float. coll. SN Davisess. 44NB, p. 41, Sept. 16, 1944.]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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44AKmF71
(Mesozoic loc. 19800)
, Ugashik
, 19800 S. N. Daviess, 1944. Wide Bay, 4.2 miles due south of Mt. Alai at elevation of 1025 feet. Kialagvik formation, upper part. (description from Imlay, 1961, p. 468);[USGS Mes. Cat.: 19800. Orig. no. 44AKmF71. Jurassic-Kialagvik, SW Alaska, Kanatak District, Wide Bay area. Outcrop near top of talus slopes on the north side of the volcanic capped promentory on the South East side of Kialagvik Creek near the SW end of the Valley. 4.2 miles due south of Mt. Alai, Elev. about 1025 ft. Strat pos. about 540 feet above the base of the Kialagvik. Lithology Black Silt & sand with overlying cgl. sandstone. Coll. S.N. Davisess. 44NB, p. 46, Sept. 25, 1944]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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45AKmF4
(Mesozoic loc. 19811)
, Ugashik
, 19811 L. B. Kellum, 1945. Wide Bay, 6.55 miles S 56° W of west end of Hartman Island at elevation of 134 feet. Kialagvik formation, 45 feet below top. (description from Imlay, 1961, p. 468);[USGS Mes. Cat.: 19811. Orig. no. 45AKmF4. Jurassic-Kialagvik fm. SW Alaska, Kanatak District, Wide Bay area. Canyon cutting sea cliffs 3000 ft east of the mouth of the most easterly of the two large streams and 6.55 miles south 56° west of the western edge of Hartman Island at an elevation of 134 ft. Strat position 45 ft below top of Kialagvik. Lithology - shaly sandstone bed. Coll. Kellum 45 NB1, p. 3. July 5, 1945]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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45AKmF17
(Mesozoic loc. 19824)
, Ugashik
, 19824 L. B. Kellum, 1945, Wide Bay, 5.9 miles S 54° W of west end of Hartman Island at elevation of 170 feet. Kialagvik formation, near top. (description from Imlay, 1961, p. 468); [USGS Mes. Cat.: 19824. Orig. no. 45AKmF17. Jurassic-Shelikof. SW Alaska, Kanatak District, Wide Bay area. Same local Geographic locality as USGS Mesozoic no. 198(rest of number missing). Strat. pos. 371 ft elev.; & 5 ft above base of Shelikof. Lithology - gray shale 20 ft above Belemnite sand. Coll. Kellum 45NB1, page 15, july 7, 1945] ck typed copy of Mes. Cat for missing number
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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44AWWF-3
(Mesozoic loc. 19934)
, Iliamna
, [Shown as locality 127 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, p. 13 provides following description: "Helmuth Wedow, Jr., 1944. Iniskin Peninsula, small tributary on right side of Cliff Creek about 5,100 ft (1,554 m) above junction with Fitz Creek and 2.42 miles (3.9 km) S. 14 deg. W. of mouth of Fitz Creek. Twist Creek Siltstone, about 85 ft (26 m) above base."]; [19934 Helmuth Wedow, Jr., 1944, Iniskin Peninsula, small tributary on right side of Cliff Creek, 2.42 miles S 14° W of mouth of Fitz Creek. Bowser member of the Tuxedni formation, about 85 feet above base. (description from Imlay, 1961, p. 468)]; [USGS Mes. Cat.: 19934. 44AWW F-3. Jurassic -Tuxedni, Bowser member. SW Alaska, Cook Inlet, Iniskin Peninsual. Mouth of small tributary on the right side of Cliff Creek, about 5100 ft. upstream from the confluence of Cliff and Fitz creeks and 2.55 miles S 14° W of mouth of Fitz Creek. Strat. Pos. 85 ft. above base of Bowser member of Tuxedni. Lithology - Sandy shale interbedded with siltstone and calcareous concretions.] Collector not listed, but obviously H. Wedow based on adjacent entries.
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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44AWWF-12
(Mesozoic loc. 19943)
, Iliamna
, [Shown as locality 124 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, p. 13 provides the following description: "Helmuth Wedow, Jr., 1944. Iniskin Peninsula, on Cliff Creek about 200 ft (67 m) downstream from a prominent cascade, 1 1/4 miles (2 km) above junction with Fitz Creek and 3.35 miles (5.3 km) east of Tonnie Peak. Twist Creek Siltstone, 125-175 km (38-53 m) above base."]; [19943 Helmuth Wedow, Jr., 1944. Iniskin Peninsula, on Cliff Creek 1 1/2 miles above junction with Fitz Creek and 3.35 miles east of Tonnie Peak. Bowser member of the Tuxedni formation, 125 to 175 feet above base. (description from Imlay, 1961, p. 468)]; [USGS Mes. Cat.: 19943. 44AWW 12. Tuxedni - Bowser member. SW Alaska, Cook Inlet region, Iniskin Peninsula. Cliff Creek about 200 ft. downstream from Prominent Cascade (McCann Falls) which is about 1.25 miles upstream from its confluence with Fitz Creek or 3.5 miles N 85 E of Tonnie Peak. Strat. Pos. 400 ft. above the base of the Bowser. Lithology - Gray sandy shale with thin beds of coarse grained sandstone with calc. concretions. Coll. H. Wedow. July 1944.]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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F-34
(Mesozoic loc. 19966)
, Iliamna
, [Shown as locality 26 on Pl. 3 of Detterman and Hartsock, 1966][Entry in USGS Mesozoic Fossil Locality register (Washington, D.C.) provides following description: "F-34. Tuxedni Fm., Iniskin Siltstone. Southwestern Alaska, Cook Inlet Region, Iniskin Peninsula. North side of Gaikima Creek about 400 ft. upstream from the mouth of the South fork of the Gaikima river or 1.12 miles N 84 deg. W of the mouth of Fitz Creek. Strat. Pos. 880 ft. below the top of the Iniskin siltstone. Lithology - shaly sandstone interbedded with sandy shale in a belemites bed. Coll. Wedow and Kellum 44NB Kellum #2 P 38, Sept. 13, 1944."]; [19966 Helmuth Wedow, Jr. and L. B. Kellum, 1944. Iniskin Peninsula, north side of
Gaikema Creek, one mile N 80° W of mouth of Fitz Creek. Siltstone about 850 feet below base of Gaikema member of Tuxedni formation. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 19966. F-34 Tuxedni, Iniskin siltstone. Southwestern Alaska, Cook Inlet Region, Iniskin Peninsula. North side of Gaikima Creek about 400 ft. upstream from the mouth of the South fork of the Gaikima river or 1.12 miles N 84° W of the mouth of Fitz Creek. Strat. Pos. 880 ft. below the top of the Iniskin siltstone. Lithology - shaly sandstone interbedded with sandy shale in a belemnites bed. Coll. Wedow and Kellum 44NB Kellum #2, p. 38, Sept. 13, 1944]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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44AWWF-68
(Mesozoic loc. 20001)
, Iliamna
, [Shown as locality 129 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, p. 14 provides following description: "Helmuth Wedow, Jr., and L.B. Kellum, 1944. Iniskin Peninsula, on northeast side of Tonnie Creek about 200 ft (61 m) downstream from top of a cascade, which is 0.9 mile (1.4 km) S. 48 deg. E. of Tonnie Peak. Twist Creek Siltstone, about 100 ft (30.5 m) above base."][Entry (card) in USGS Mesozoic Fossil Locality register (Washington, D.C.) provides following description: "Jurassic - Tuxedni, Bowser. Orig. no. 44AWWF68. SW Alaska, Cook Inlet Region, Iniskin Peninsula. Northeast side of Tonnie Creek about 200 feet downstream from top of lower cascade mentioned in loc. 19999. The top of the cascade is about 0.9 mile S 55 deg. E from Tonnie Peak. 100 feet above base of Bowser mbr. Concretions in shale series. Collected by Wedow and Kellum, Sept. 26, 1944."]; [20001 Helmuth Wedow, Jr., and L. B. Kellum 1944. Iniskin Peninsula, northeast side of Tonnie Creek 0.9 mile S 48° E of Tonnie Peak. Bowser member of Tuxedni formation, about 100 feet above base. (description from Imlay, 1961, p. 469)]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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48AI96
(Mesozoic loc. 21258)
, Ugashik
, 21258 R. W. Imlay and D. J. Miller, 1948. Same as Mes. Loc. 19773. (description from Imlay, 1961, p. 469);[USGS Mes. Cat.: 21258. (orig. no. 48AI96). Lower and Middle Jurassic - Kialagvik F. Same geographical location as 21245, same stratigraphical level as 2123 . Stream entering Wide Bay from northwest about 2 2/3 miles southwest of mouth of Short Creek. 6.21 miles S88°W of Hartman Island. Sandstone and sandy siltstone, about 225 feet below the top of the Kialagvik formation. Same locality as lots 44AKellum F42 & F43. USGS Mes. local. nos. 19722 & 19773, Aug. 24, 1948.]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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48AI81
(Mesozoic loc. 21282)
, Kenai
, [Shown as locality 133 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 60 deg. 06'26" N., 152 deg. 42'40" W.][Imlay, 1982, p. 13 provides following description: "R.W. Imlay and D.J. Miller, 1948. Tuxedni Bay area, on tributary entering Bear Creek from the southeast, 4.75 miles (7.6 km) S. 22 deg. W. of Fossil Point. Twist Creek Siltstone, 300 ft. (91 m) above base."];[21282 R. W. Imlay and D. J. Miller, 1948. Tuxedni Bay area, on tributary entering Bear Creek from the southeast 4.75 miles S 22° W of Fossil Point. Bowser member of the Tuxedni formation, about 300 feet above base. (description from Imlay, 1961, p. 469)]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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48AI29
(Mesozoic loc. 21313)
, Iliamna
, [Shown as locality 124 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, p. 13 provides the following description: "R.W. Imlay and D.J. Miller, 1948. Iniskin Peninsula, on Cliff Creek just below a cascade. Same location and stratigraphic position as USGS Mesozoic locs. 11036 and 19943."]; [21313 R. W. Imlay and D. J. Miller, 1948. Iniskin Peninsula. Same as Mes. Loc. 11036. (description from Imlay, 1961, p. 469)];[USGS Mes. Cat.: 21313. Orig. no. 48AI29. Middle Jurassic - Tuxedni Fm. - Bowser M. Same geographical loc. as no. 21292. Cliff Creek, 3.60 miles N. 88° E . of Tonnie Peak. Small limestone concretions in gray siltstone 125 to 175 feet above the base of the member and just below waterfalls. Same location as U.S.G.S. Mes. Loc. No. 11036, 19943. July 16, 1948]
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Oppelia (Oxycerites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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48AI30
(Mesozoic loc. 21314)
, Iliamna
, [Shown as locality 125 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 60 deg. 06'15" N., 152 deg. 43'39" W.][Imlay, 1982, p. 13 provides the following description: "R.W. Inlay and D.J. Miller, 1948. Iniskin Peninsula, on Cliff Creek 3.66 miles (5.8 km) N. 87 deg. E. of Tonnie Peak. Same location as USGS Mesozoic locs. 11034 and 19934. Twist Creek Siltstone, 10-100 ft (3-30 m) above base."]; [21314 R. W. Imlay and D. J. Miller, 1948.
Iniskin Peninsula. Same as Mes. Loc. 11034. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 21314. Orig. No. 48AI30. Middle Jurassic - Tuxedni Fm. Bowser Member. Geographical location same as no. 21292. Cliff Creek 3.66 miles N. 87° E. of Tonnie Peak. Small limestone concretions in gray siltstone, 10 to 75 ft above the base of the member, Same location as USGS Mes. Loc. nos. 11034 & 19934. July 16, 1948]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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48AI31
(Mesozoic loc. 21315)
, Iliamna
, [Shown as locality 124 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, p. 13 provides the following description: "R.W. Imlay and D.J. Miller, 1948. Iniskin Peninsula, on Cliff Creek near USGS Mesozoic locs. 21313 and 19943. Twist Creek Siltstone, float from lower 175 ft. (53 m).; [21315 R. W. Imlay and D. J. Miller, 1948. Iniskin Peninsula on Cliff Creek near Mes. loc. 21313. Bowser member of the Tuxedni formation, float from lower 175 feet. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 21315. Orig. No. 48AI31. Middle Jurassic - Tuxedni Fm., Bowser Memb. Same geographical location as no. 21292. Cliff Creek near location of lots 211313 (48AI29), 21314 (48AI30), Float, from lower 175 feet of Bowser Memb. July 16, 1948]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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48AI35
(Mesozoic loc. 21318)
, Iliamna
, [Shown as locality 126 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, p. 14 provides following description: "R.W. Imlay and D.J. Miller, 1948. Iniskin Peninsula, on Tonnie Creek 1 to 1.05 miles (1.6 km) S. 51 deg. E. of Tonnie Peak. Same location as USGS Mesozoic loc. 27099. Twist Creek Siltstone. 50-125 ft (15-38 m) above base."]; [21318 R. W. Imlay and D. J. Miller, 1948. Iniskin Peninsula on Tonnie Creek 1.0 to 1.05 miles S 51'°E of Tonnie Peak, Bowser member of the Tuxedni formation, 50 to 125 feet above base. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 21318. Orig. no. 48AI35. Middle Jurassic-Tuxedni Fm. Bowser Memb. Same geographic location as no. 21292. Tonnie Creek 1.00 to 1.05 miles S. 51° E. of Tonnie Peak. Small limestone concretions in gray siltstone, 50 to 125 feet above the base of the Bowser Member. Same location U.S.G.S. Mes. loc. no. 20001. July 18, 1948]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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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]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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51AGz140
(Mesozoic loc. 22709)
, Kenai
, 0.3 mile above mouth of tributary described under 50 AGz139. (description from Imlay E&R report of Dec. 20, 1951; shipment AF-51-40)[Shown as locality 128 on Pl. 3 of Detterman and Hartsock, 1966 - Note by R.B. Blodgett: digitization of this point gives approx. lat. 60 deg. 06'15" N., 152 deg. 43'34" W.][Imlay, 1982, p. 13 provides the following description: "Arthur Grantz, 1951, Tuxedni Bay area, about 0.3 mile (0.5 km) above mouth of tributary entering Bear Creek from southeast at a point 2.53 miles (4 km) from Tuxedni channel. Twist Creek Siltstone, about 100 ft (30.5 m) above base."]; [22709 Arthur Grantz, 1951. Tuxedni Bay area, 0.3 mile above mouth of tributary entering Bear Creek from southeast at point 2.53 miles from Tuxedni channel. Bowser member of the Tuxedni formation, about 100 feet above base. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 22709 - Jurassic-Alaska - 51AGz-140. Aug. 24, 1951 - Bowser. 0.3 miles from the mouth of tributary described in #22706.]
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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52AGz85
(Mesozoic loc. 24113)
, Talkeetna Mts
, From landslide scar 1.63 miles north of mouth of Albert Creek. (from E&R report of R.W. Imlay, January 21, 1953) [Arthur Grantz, Richard Hoare, and R.W. Imlay, 1952. Talkeetna Mountains A-1 quad. From a landslide scar 1.63 mi (2.6 km) north of the mouth of Albert Creek. Tuxedni Group 200-250 ft (61-76 m) above base. (description from Imlay, 1984, USGS Prof. Paper 1322, p. 30)][Imlay, 1964, p. B22 provides following description: "Arthur Grantz, Richard Hoare, and R.W. Imlay, 1952. Talkeetna Mountains (A-1) quad. From a landslide scar 1.63 miles north of the mouth of Albert Creek. Tuxedni Formation, 50-250 ft above base."]; [24113 Arthur Grants, Richard Hoare and R. W. Imlay, 1952. Talkeetna Mountains A-1 quad., from a landslide scar 1.63 miles north of mouth of Albert Creek. Lower part of Tuxedni formation equivalent. (description from Imlay, 1961, p. 469)]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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53AGz144
(Mesozoic loc. 24821)
, Anchorage
, From upper half of a sandstone unit equivalent to the lower part of the Tuxedni Formation. (description from Imlay E&R report of 3/29/1954; Shipment A-53-25) [Imlay, 1982, p. 12 provides following description: "Arthur Grant and L.F. Fay, 1953. Talkeetna Mountains near head of Sheep Creek, lat 61 deg. 59'17" N., long 147 deg. 38'35" W., Anchorage (D-2) quadrangle. Tuxedni Group, near top in beds equivalent to the Twist Creek Siltstone."]; [24821 Arthur Grantz and L. F. Fay, 1953. Anchorage D-2 quad. on Sheep Creek. Lat. 61° 59' 17" N., Long. 147° 38' 35" W., Tuxedni formation equivalent, upper half. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 24821. Orig. no. 53AGz-144 - Tuxedni fm. - Middle Jurassic, Nelchina District, Anchorage (D-2), 61°59'17" N., 147°38'35" W., from upper 1/2 of a ss. unit equivalent to the lowerw part of the Tuxedni Fm., on Sheep Creek, Talkeetna Mts., Alaska. Coll. A. Grantz and L. Fay, 1953.]
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Dettermanites vigorosus Imlay, n. gen., n. sp.
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CEK-733
(Mesozoic loc. 25831)
, Kenai
, Red Glacier, Cook Inlet area [Note by R.B. Blodgett: E&R report provides no further data, however, Kirschner's transmittal sheet indicate that this collection was made by Kirschner (of Standard Oil Co. of California) on July, 12, 1955 from "Foss slst" at Red Glacier in the Kenai quadrangle]; [no description given in text of Imlay, 1961, only under faunal list for species is it cited]; [USGS Mes. Cat.: 25831. CEK 733. Jurassic. Tuxedni ? Fm. Kenai Quad., Red Glacier. North side of Cook Inlet south of Tuxedni Bay, Alaska. Coll. by Kirschner.]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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57ADt5
(Mesozoic loc. 26593)
, Iliamna
, Bowser member of Tuxedni Formation. 20 feet below lowermost sandstone on Cliff Creek. (description from Imlay E&R report of 1/22/58; Shipment A-58-1)[Transmittal sheet of Detterman, dated 12/18/57 provides following description: "Bowser member of Tuxedni formation; 20 feet below lowermost sandstone; rust-brown weathering silty shale; Cliff Creek; Coords: 11.58-13.21, 59 deg. 46'20"N, 153 deg. 11'W, Section 3, T.58S-R.23.W."][Shown as locality 131 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, provides the following description: "R.L. Detterman, 1957. Iniskin Peninsula, on Cliff Creek near USGS Mesozoic loc. 21313, lat. 59 deg. 49'20" N., long. 153 deg. 11'00" W. Twist Creek Siltstone, 200 ft (61 m) above base." (Note by R.B. Blodgett: the lat. 59 deg. 49'20" is incorrect; judging by the map location in Detterman and Hartsock, the earlier given of 59 deg. 46'20" appears to be correct)]; [26593 R. L. Detterman, 1957. Inisikin Peninsula on Cliff Creek near Mes loc. 21313. Bowser member of the Tuxedni formation, 200 feet above base. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 26593. 57ADt5. Bowser Member of Tuxedni Fm. Middle? Jurassic. 20' below lowermost ss & about 200' above Cynthia Falls Mem. Rust brown weathering silty sh. on Cliff Ck. Coords. 11.58-13.21. Lat. 59° 46'20", Long. 153° 11'00" W., Sec. 3, T. 5 S., R. 23 W., Iniskin Pen., Alaska. Coll. by Detterman, 1957]
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Megasphaeroceras rotundum Imlay, n. gen., n. sp.
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58ADt2
(Mesozoic loc. 27099)
, Iliamna
, Bowser member of Tuxedni formation. 75-100 feet above base. (description from Imlay E&R report of 12/30/58; Shipment A-58-14) [Transmittal sheet of Detterman, dated Nov. 24, 1958, provides following description: "Bowser member; 75-100 feet above base; rusty weathering silty shale with siltstone interbeds and small limy conc., Tonnie Creek, 0.81 mi. N. 55 deg. W. of I.B.A. No. 1; Coords. 9.12-12.18, 59 deg. 45'30"N., 153 deg. 15'05"W."][Shown as locality 126 on Pl. 3 of Detterman and Hartsock, 1966][Imlay, 1982, p. 14 provides following description: "R.L. Detterman, 1958. Iniskin Peninsula, on Tonnie Creek 0.81 mile N. 55 deg. W. of Iniskin Bay Association No. 1 well. Lat. 59 deg. 45'30" N., long. 153 deg. 15'05" W. Same location as USGS Mesozoic loc. 21318. Twist Creek Siltstone, 75-100 ft (23-30 m) above base."]; [27099 R. L. Detterman, 1958. Iniskin Peninsula on Tonnie Creek 0.81 mile N 55° W of Iniskin Bay Association No. 1 well. Bowser member of the Tuxedni formation, 75 to 100 feet above base. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 27099. 57ADt2. Upper Jurassic. Bowser Member of Tuxedni fm. 75-100' above base. Silty shale, rusty weathering, with siltst. interbeds & small limy core. Tonnie Ck., 0.81 mile N55°W of IBA #1 well. Coords. 9.12, 12.18. Lat. 59°45'30" N., Long. 153°15'05" W. R.L. Detterman 1958.]
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Oppelia (Liroxyites) kellumi Imlay, n. subgen., n. sp.
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HH 116
(Mesozoic loc. 27577)
, Talkeetna Mts
, Western Gulf Oil Co., 1959. Talkeetna Mountains (A-1) quad., near Crooked Creek south of Nelchina, lat 62 deg. 02'00" N., long 147 deg. 18'00" W., Tuxedni Formation, lower part. (description from Imlay, 1964, USGS Prof. Paper 318-B, p. B22); [27577 Western Gulf Oil Co., 1959. Talkeetna Mountains A-1 quad., near Crooked Creek south of Nelchina, Lat. 62° 02' N., Long. 147° 18' W. Tuxedni formation equivalent, lower part. (description from Imlay, 1961, p. 469)]; [USGS Mes. Cat.: 27577 HH 116. Middle Jurassic. Lower Tuxedni fm. equivalent. Crooked Creek area. South of Nelchina, Talkeetna Mtns. quad., Lat. 62°02' N., Long. 147°18' W. Coords. 22.22; 0.98, Alaska. Coll. by Western Gulf Oil Co.]
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Parabigotites crassicostatus Imlay, n. gen., n. sp.
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