Ammonites and some characteristic bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming
By: by William A. Cobban.
Series: Evolution of sedimentary basins--Powder River Basin ;; ch. B; U.S. Geological Survey bulletin ;; 1917-B
Publisher: U.S. G.P.O.; For sale by the Books and Open-File Reports Section, U.S. Geological Survey
Published: 1990
Place of publication: Washington, D.C; Denver, CO
Language: eng
Number of pages: 13
Subjects: Ammonoidea -- Colorado -- Natrona County; Bivalvia, Fossil -- Colorado -- Natrona County; Paleontology -- Cretaceous; Paleontology -- Colorado -- Natrona County; Frontier Formation
Notes: Includes bibliographical references (p. 11-13.