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

I-2343-A 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, scale 1:200,000, 1993, ISBN 978-0-607-79510-3 Keywords: Powder river basin, Stratigraphic Geology, Stratigraphy, Geologic maps