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Ammonites and some characteristic bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming / by William A. Cobban.

Record details

  • Physical Description: 1 online resource (iv, 13 pages, 11 pages of plates) : illustrations, maps.
  • Publisher: [Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1990.
  • Distributor: [Washington, D.C.] : United States Government Printing Office

Content descriptions

General Note: Title from title screen (viewed Aug. 20, 2014).
Bibliography, etc. Note: Includes bibliographical references.
Subject: Ammonoidea > Wyoming > Natrona County.
Bivalves, Fossil > Wyoming > Natrona County.
Geology, Stratigraphic > Cretaceous.
Paleontology > Wyoming > Natrona County.
Frontier Formation.

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