Ammonites of early cretaceous age (Valanginian and Hauterivian) from the Pacific coast states.

"The ammonite succession provides correlations within the Pacific Coast States and with other areas.

Bibliographic Details
Main Author:	Imlay, Ralph W. (Ralph Willard), 1908-1989
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Govt. Print. Off, 1960.
Series:	Professional paper (Geological Survey (U.S.)) ; 334-F. Shorter contributions to general geology.
Subjects:	Ammonoidea. Geology, Stratigraphic > Cretaceous. Paleontology > Cretaceous. Paleontology > Pacific Coast (U.S.)

by Imlay, Ralph W. (Ralph Willard), 1908-1989
Published 1960

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