National Geologic Map Database
General Information
- Title: The stratigraphy of the Montana Group, with special reference to the position and age of the Judith River Formation in north-central Montana
- Author(s): Bowen, C.F.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Professional Paper 90-I
- Larger Work: Shorter contributions to general geology, 1914
- Publication Date: 1915
- Map Scale: 1:500,000
- Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.