Geologic map showing thickness 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 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, M.L. Gibson, and G.L. Sims
Series Titles:
Miscellaneous investigations series ; map I-2380-B Miscellaneous investigations series (Geological Survey (U.S.)) ; I-2380-B.
Variant Titles:
Thickness of the upper Cretaceous Pierre Shale in the south half of the Powder River Basin, northeastern Wyoming and adjacent areas, geologic map