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Observations on the Cenomanian (Upper Cretaceous) ammonite Calycoceras (Calycoceras) obrieni Young, 1957 from Arizona and New Mexico

Abstract:
Calycoceras (Calycoceras) obrieni Young, 1957 is revised on the basis of new collections from the upper Cenomanian Metoicoceras mosbyense zone of Arizona and New Mexico, and differences between it and C. (C.) naviculare (Mantell, 1822) are described. -Authors

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Authors


Cobban, WA More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Journal:
US Geological Survey Bulletin
Volume:
1881
Publication date:
1990
ISSN:
0083-1093
URN:
uuid:6d2a9d8c-ecf5-4707-a568-a3b83b6c030c
Source identifiers:
177756
Local pid:
pubs:177756
Language:
English

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