The late Cretaceous ammonites Scaphites leei Reeside and Scaphites hippocrepis (DeKay) in the western interior of the United States
By: by William A. Cobban.
Series: Geological Survey professional paper 619; Geological Survey professional paper ;; 619.
Publisher: U.S. Govt. Print. Off.
Published: 1969
Place of publication: Washington
Language: eng
Number of pages: 29
Subjects: Scaphites.; Paleontology -- Cretaceous.; Paleontology -- United States.
Description: Additional title page description: Three chronological forms each of Scaphites leei and Scaphites hippocrepis occur in dimorphic pairs and provide a means of correlating thin units of strata.
Notes: Bibliography: p. 24-27.