Type sections and stratigraphy of the members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass arch, Montana
Subtitle: a report of a formal subdivision and age assignments of a classic Cretaceous area
By: by W. A. Cobban ... [et al.].
Contributors: Cobban, William Aubrey, 1916-
Series: Geological survey professional paper ; 974; Geological Survey professional paper ;; 974.
Publisher: U.S. Govt. Print. Off.
Published: 1976
Place of publication: Washington
Language: eng
Number of pages: 66
Subjects: Geology, Stratigraphic -- Cretaceous; Geology, Stratigraphic -- Nomenclature -- Montana; Blackleaf Formation (Mont.)
Notes: Bibliography: p. 61-63.
Includes index.