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Upper Cretaceous heteromorph ammonites from the Baculites compressus zone of the Pierre Shale in north-central Colorado

Abstract:

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 Stephenson, Jeletzkytes nodosus (Owen) and Hoploscaphites cf. H. landesi Ricardi. Comparisons are made with faunal assemblages from other parts of the USA and Poland. The presence of J. nodosus confirms a ...

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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Role:
Author
Journal:
US Geological Survey Bulletin
Volume:
2024
Publication date:
1993-01-01
ISSN:
0083-1093
URN:
uuid:ed925c5d-514a-4296-8f16-f38b8f207649
Source identifiers:
177879
Local pid:
pubs:177879
Language:
English

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