Reference
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Title: |
Report on Referred Fossils
,
1958
(12/19)
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Report by: |
Ralph W. Imlay
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Referred by: |
Joseph M. Hoare
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| Age: | Bajocian-Callovian (middle Bajocian - Callovian) |
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Comment: | The specimens of Inoceramus from locality F1 are Jurassic in age as suspected by David Jones and Arthur Grantz. They are identical specifically with the Inoceramus at Mesozoic localities 21481 and 21032 and 13430. They belong to a line of Inoceramus that in the Cook Inlet area first appeared in the Fitz Creek member (middle Bajocian) of the Tuxedni formation and ranged upward into the Chinitna formation (Callovian). They were described by Eichwald (1871) under the names I. eximius, I. porrectus, and I. ambiguus. these are probably all variants of a single species. I notice that I have used the name I. ambiguus Eichwald more commonly than the other names proposed by Eichwald. A detailed study will be necessary before this Inoceramus lineage will be of much stratigraphically. Eichwald's book is now with David Jones at Menlo Park if you are interested in looking at the original illustrations of the species mentioned. |
Occurrence(s) |
No. |
Group |
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Name |
Qty |
Notes |
1 |
Bivalves |
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Inoceramus |
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belongs to a lineage that ranges from the middle Bajocian to the Callovian in the Cook Inlet region |
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