Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming
Geologic map showing the thickness and structure of the Anderson-Wyodak coal bed in the north half of the Powder River Basin, southeastern Montana and northeastern Wyoming / Department of the Interior, U.S. Geological Survey ; by N.M. Denson and C.T. Pierson
Series Titles:
Miscellaneous investigations series ; map I-2094-A Miscellaneous investigations series (Geological Survey (U.S.)) ; I-2094-A.