Some Middle Cenomanian (Upper Cretaceous) Acanthoceratid Ammonites from the western interior of the United States / by William A. Cobban.
Ammonites of the genera Calycoceras, Acanthoceras, Plesiacanthoceras, and Protacanthoceras from the Frontier Formation and equivalent rocks are described and illustrated.
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| Corporate Author: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
[Reston, Va.?] : Denver, CO :
Dept. of the Interior, U.S. Geological Survey ; For sale by the Books and Open-File Reports Section,
1987.
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| Series: | U.S. Geological Survey professional paper ;
1445. |
| Subjects: |
Earth Sciences & Map Library - Stacks
| Call Number: |
I 19.16:1445
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| I 19.16:1445 | Available Place a Hold |