Geologic map showing thickness of sedimentary rocks from the ground surface to the top of the upper Cretaceous Pierre Shale in the south half of the Powder River Basin, northeastern Wyoming and adjacent areas
Geologic map showing thickness of sedimentary rocks from the ground surface to the top of the upper Cretaceous Pierre Shale in the south half of the Powder River Basin, northeastern Wyoming and adjacent areas / U.S. Department of the Interior, U.S. Geological Survey ; by N.M. Denson, C.T. Pierson, and W.D. Grundy
Series Titles:
Miscellaneous investigations series ; map I-2433-B Miscellaneous investigations series (Geological Survey (U.S.)) ; I-2433-B.