National Geologic Map Database
General Information
- Title: Geophysical log signatures of Lower Tertiary and Upper Cretaceous rocks in the Powder River Basin, Wyoming and Montana
- Author(s): Seeland, David, Hardie, J.K., Gibbons, A.B., Johnson, E.A., Biewick, L.R.H., McLellan, M.W., Molina, C.L., and Pierce, F.W.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Oil and Gas Investigations Chart OC-140
- Publication Date: 1993
- Map Scale: 1:7,000,000
- Cross Section: Yes
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