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Reference
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| Title: |
Report on Referred Fossils
,
1955
(11/04)
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These collections that have been submitted have furnished information that should be of interest to many geologists and are well worth keeping in the Survey Collections. Their value would be greater if the locations of the various collections were shown on index maps. These would be filed with the reports and be available for future use by anyone. Such maps would be appreciated, especially for areas in which localities are difficult to describe. [Note: these collections were referred by C.E. Kirschner through George Gates] |
| Report by: |
Ralph W. Imlay
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| Referred by: |
Charles E. Kirschner
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| | Age: | Late Cretaceous |
| Formation: | Kaguyak Formation (Revised; Robert B. Blodgett, 02/09/2008 ) |
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| Comment: | The collection of Cretaceous fossils from the head of the Alaskan Peninsula are of very late Late Cretaceous age. The collection containing Pachydiscus subcompressus Matsumoto and P. suciaensis (Meek) are probably as late as early Maestrichtian. The same species occurs elsewhere in Alaska in the Matanuska Valley near the top of the shale and siltstone member of the Matanuska formation. They occur on Vancouver Island in the Lambert formation (see Ushur, Canada Geol. Survey Bull. 21, p. 34). Some of the species occur in California near the top of the Panoche formation. In Japan they, or very similar species, occur at the very top of the Cretaceous sequence. The presence of very smooth, compressed pachydiscid ammonites, such as in the collections submitted, are evidence of a position near the top of the Cretaceous. |
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