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    Geologic map showing distribution of clinker in the tertiary Fort Union and Wasatch formations, northern Powder River Basin, Montana by Geological Survey (U.S.)

    Published: The Survey ; For sale by Map Distribution, 1993
    Description: 1 map : color ; 95 x 85 cm, on sheet 142 x 104 cm, folded in envelope 30 x 24 cm.
    Map