Upper Cretaceous heteromorph ammonites from the Baculites compressus zone of the Pierre Shale in north-central Colorado
The Baculites compressus zone of the Pierre Shale in Grand County, Colo., contains the following assemblage of heteromorph ammonites: Axonoceras compressum Stephenson, Anaklinoceras reflexum Stephenson, A. gordiale n.sp., Solenoceras reesidei Stephenson, Baculites compressus Say, B. undatus Stephens...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1993
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