Geologic map of the Powder River basin and surrounding area, Wyoming, Montana, South Dakota, North Dakota, and Nebraska, Ellis, M.S. & Colton, R.B.

I-2298 Geologic map of the Powder River basin and surrounding area, Wyoming, Montana, South Dakota, North Dakota, and Nebraska, scale 1:500,000, 1994, ISBN 978-0-607-79469-4 Keywords: Powder river basin, Geologic map, Bedrock