Sample Detail of
Sample: Sample No. 46AKr33 -- USGS No. Mesozoic loc. 20756
Locality: Field No. 46AKr33
Description: C.E. Kirschner, 1946. Tuxedni Bay area, south shore west of Fossil Point. Float from both Fitz Creek Silstone and Cynthia Falls Sandstone. (description from Imlay, 1964, p. B23)
Location: Alaska Quadrangle: Kenai A-8
Reference
Title: Middle Bajocian ammonites from the Cook Inlet region, Alaska ,  1964
ABSTRACT

Jurassic ammonites of middle Bajocian age occur in the Tuxedni Group along the northwest side of Cook Inlet and in the Tuxedni Formation in the eastern part of the Talkeetna Mountain, Alaska. Numerically the dominant families are the Otoitidae and Stephanoceratidae. The families Phylloceratidae, Sonninidae, Oppelidae, and Perisphinctidae together compose only about one-third of the total specimens.

The Tuxedni Group has not furnished any ammonite genera that characterize the European zone of Sonninia sowerbyi at the base of the middle Bajocian. It has, however, furnished ammonites that characterize the next higher zones of Otoites sauzei and Stephanoceras humphriesianum.

......
Report by: Ralph W. Imlay
Age: Bajocian (middle Bajocian)
Formation: Fitz Creek Siltstone; Cynthia Falls Sandstone (Fitz Creek Siltstone, Cynthia Falls Sandstone)
Comment:Shown as locality 22 in Figure 2.
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Sonninia? sp. juv.
2 Ammonoids Chondroceras defontii (McLearn)
3 Ammonoids Normannites (Itinsaites) crickmayi (McLearn)
4 Ammonoids Stephanoceras (Skirroceras) kirschneri Imlay, n. sp. One specimen (paratype) from this locality illustrated in Pl. 18, fig.3 and Pl. 19, figs. 2-3, 5-6
5 Ammonoids Zemistephanus richardsoni (Whiteaves)