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

Cobban, WA; Kennedy, WJ

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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APA Style

Cobban, W. A., & Kennedy, W. J. (1990). Observations on the Cenomanian (Upper Cretaceous) ammonite Calycoceras (Calycoceras) obrieni Young, 1957 from Arizona and New Mexico. US Geological Survey Bulletin, 1881.

MLA Style

Cobban, W. A., and W. J. Kennedy. “Observations on the Cenomanian (Upper Cretaceous) Ammonite Calycoceras (Calycoceras) Obrieni Young, 1957 from Arizona and New Mexico.” US Geological Survey Bulletin, vol. 1881, US Geological Survey Bulletin, 1990.

Chicago Style

Cobban, WA, and WJ Kennedy. 1990. “Observations on the Cenomanian (Upper Cretaceous) Ammonite Calycoceras (Calycoceras) Obrieni Young, 1957 from Arizona and New Mexico.” US Geological Survey Bulletin 1881.
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Authors

Cobban, WA More by this author

+ Kennedy, WJ More by this author

Institution:

University of Oxford

Department:

Oxford, MPLS, Earth Sciences

Bibliographic Details

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

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Language:: English

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License:: Terms and Conditions of Use for Oxford University Research Archive

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

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