Sample Detail of
Sample: Sample No. F-34 -- USGS No. Mesozoic loc. 19966
Locality: Field No. F-34
Description: [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 84o 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]
Location: Alaska Quadrangle: Iliamna D-1
Reference
Title: Geology of the Iniskin-Tuxedni Region, Alaska ,  1966
Report by: Robert L. Detterman , John K. Hartsock
Age: Bajocian
Formation: Red Glacier Formation
Comment:Geographic location: Gaikema Creek
Map reference (pl. 3): 26
Stratigraphic position below top of formation (ft): 850
all above data from Table 4, p. 24
Occurrence(s)
No. Group Name Qty Notes
1 Bivalves Cucullaea sp. fauna identified by R.W. Imlay
2 Bivalves Inoceramus sp.
3 Bivalves Pteria sp.
4 Bivalves Pecten sp.
5 Bivalves Pleuromya sp.
6 Bivalves Pholadomya sp.
7 Bivalves Protocardia sp.
8 Ammonoids Lytoceras cf. L. eudisianum d'Orbigny
9 Ammonoids Stephanoceras sp.
10 Ammonoids Stemmatoceras cf. S. snugharborense Imlay
11 Ammonoids Parabigotites crassicostatus Imlay
12 Belemnites Belemnites sp.

Title: New genera and subgenera of Jurassic (Bajocian) ammonites from Alaska ,  1961
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.
Report by: Ralph W. Imlay
Age: Bajocian
Formation: Tuxedni Group (lower siltstone member of the Tuxedni Formation)
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Parabigotites crassicostatus Imlay, n. gen., n. sp.