National Geologic Map Database
Product Description Page
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Title: Stratigraphy of mid-Cretaceous Blackleaf and lower part of the Frontier Formations in parts of Beaverhead and Madison Counties, Montana
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Author(s): Dyman, T.S., and Nichols, D.J.
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Publishing Organization: U.S. Geological Survey
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Series and Number: Bulletin 1773
- Publication Date: 1988
- Map Scale: 1:937,000
- Cross Section: None
- North Latitude: 45° 25' 59" N (45.4330)
- South Latitude: 44° 24' 22" N (44.4060)
- East Longitude: 111° 45' 0" W (-111.7500)
- West Longitude: 112° 55' 59" W (-112.9330)
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.