Geologic and structure map, with contours on top of the Pierre Shale, for the north half of the Powder River basin, southeastern Montana and northeastern Wyoming
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Geology topics
M.L. Gibson
Publications and source records attributed to M.L. Gibson.
Geologic and structure map, with contours on top of the Pierre Shale, for the south half of the Powder River basin, northeastern Wyoming
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Geologic map showing thickness of the upper Cretaceous Pierre Shale in the north half of the Powder River basin, southeastern Montana and northeastern Wyoming
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Geologic map showing thickness of the upper Cretaceous Pierre Shale in the south half of the Powder River Basin, northeastern Wyoming and adjacent areas
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Geologic and structure map of the Powder River basin, Southeastern Montana and northeastern Wyoming
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Geologic and structure map of the south half of the Powder River and adjacent areas, northeastern Wyoming
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