National Geologic Map Database
Product Description Page
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Title: Stratigraphy and geologic history of Montana Group and equivalent rocks, Montana, Wyoming, and North and South Dakota
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Author(s): Gill, J.R., and Cobban, W.A.
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Publishing Organization: U.S. Geological Survey
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Series and Number: Professional Paper 776 [37 p.]
- Publication Date: 1973
- Map Scale: 1:4,224,000
- Cross Section: Yes
- North Latitude: 49° 0' 5" N (49.0014)
- South Latitude: 40° 59' 41" N (40.9947)
- East Longitude: 97° 22' 15" W (-97.3708)
- West Longitude: 113° 16' 6" W (-113.2683)
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* See base map disclaimer below.
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.