The late Cretaceous ammonites Scaphites leei Reeside and Scaphites hippocrepis (DeKay) in the western interior of the United States /

Bibliographic Details
Main Author: Cobban, William A., 1916-2015 (Author)
Format: Government Document eBook
Language:English
Published: Washington : U.S. Department of the Interior, Geological Survey, 1969.
Series:Geological Survey professional paper ; 619.
Subjects:
Online Access:https://purl.fdlp.gov/GPO/gpo80794
Description
Item Description:Title from title screen (viewed September 24, 2014).
"Three chronological forms each of Scaphites leei and Scaphites hippocrepis occur in dimorphic pairs and provide a means of correlating thin units of strata."
Physical Description:1 online resource (iii, 29 pages, 5 pages of plates) : illustrations, map.
Bibliography:Includes bibliographical references (pages 24-27) and index.