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Powder River Basin, Wyoming - Pierre Shale Stratigraphy Map, 1993
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Powder River Basin - Upper Cretaceous Pierre Shale Thickness Map, 1993
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Powder River Basin Geologic Investigations Map, Montana and Wyoming - Historical Print
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Powder River Basin, Wyoming - Geologic Investigations Map, 1992
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Powder River Basin, Montana and Wyoming - Structure and Stratigraphy Map, 1992
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Correlation and Oil-Shale Assays Map - LaClede Bed, Green River Formation, Wyoming
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Elk Ridge Quadrangle Coal Map - Powder River County, Montana
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Powder River Basin, Wyoming - Coal Investigations Map, 1991
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Powder River Basin Coal Thickness Map, Montana-Wyoming, 1991
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Snake River Canyon, Idaho - Bedrock Geology Map, 1990
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Tongue River Member, Powder River Basin, Wyoming - Coal Map, 1990
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Skykomish River Quadrangle, Washington - Bedrock Geologic Map, 1993
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Southeastern Powder River Basin, Wyoming - Coal Stratigraphy Map, 1990
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Geologic Map and Profile of Snake River Canyon North Wall, Idaho
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Snake River Canyon, Idaho - Geologic Quadrangle Map, 1990
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Snake River Canyon, Idaho - Geologic Map, 1991 | Historical Map Print
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