National Geologic Map Database
General Information
- Title: Subsurface stratigraphy of Lower Mesozoic and Upper Paleozoic formations in the basin area of south-central Montana
- Author(s): Hadley, H.D., Gardner, L.S., and Rogers, C.P.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Oil and Gas Investigations Chart OC-19
- Publication Date: 1945
- Map Scale: 1:1,980,000
- Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.