Depositional history of Triassic rocks in the area of the Powder River Basin, northeastern Wyoming, and southeastern Montana /
Johnson, Edward A.(Edward Allison),1940-
Washington, D.C. : U.S. G.P.O. ; Denver, CO : For sale by USGS Map Distribution, Denver Federal Center,
1993.
Includes bibliographical references (p. 26-30).
Geology, Stratigraphic
Sedimentation and deposition
Geology