National Geologic Map Database
General Information
- Title: Bentonite deposits of the northern Black Hills district, Montana, Wyoming, and South Dakota
- Author(s): Knechtel, M.M., and Patterson, S.H.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Mineral Investigations Field Studies Map MF-36 [2 sheets]
- Publication Date: 1956
- Map Scale: 1:48,000
- Cross Section: None
- North Latitude: 45° 6' 0" N (45.1000)
- South Latitude: 44° 39' 30" N (44.6583)
- East Longitude: 103° 48' 19" W (-103.8053)
- West Longitude: 104° 57' 0" W (-104.9500)
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- U.S. Geological Survey
- USGS Information Services
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- Phone: (303) 202-4700 or 1-888-ASK-USGS
- Fax: (303) 202-4710
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.