Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian boundary in Montana
By: by Edwin K. Maughan and Albert E. Roberts.
Contributors: Roberts, Albert Eugene, 1921- joint author.
Series: Shorter contributions to general geology; Geological Survey professional paper 554-B; Shorter contributions to general geology.; Geological Survey professional paper ;; 554-B.
Publisher: U.S. Govt. Print. Off.
Published: 1967
Place of publication: Washington
Language: eng
Number of pages: 27
Subjects: Geology, Stratigraphic -- Pennsylvanian.; Geology, Stratigraphic -- Mississippian.; Geology -- Montana.
Description: "A study of the Upper Mississippian and Pennsylvanian sedimentary formations with special emphasis on their regional correlation, variation in lithology, and age assignments."
Notes: Bibliography: p. 25-27.
Part of illustrative matter fold. in pocket.