National Geologic Map Database
Product Description Page
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Title: Geologic map of the Portage quadrangle, Cascade and Choteau Counties, Montana
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Author(s): Maughan, E.K., and Lemke, R.W.
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Publishing Organization: U.S. Geological Survey
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Series and Number: Miscellaneous Investigations Series Map I-2196
- Publication Date: 1991
- Map Scale: 1:31,680
- Cross Section: None
- North Latitude: 47° 45' 0" N (47.7500)
- South Latitude: 47° 30' 0" N (47.5000)
- East Longitude: 111° 0' 0" W (-111.0000)
- West Longitude: 111° 15' 0" W (-111.2500)
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