National Geologic Map Database
Product Description Page
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Title: Ore deposits of the Helena mining region, Montana
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Author(s): Knopf, Adolph
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Publishing Organization: U.S. Geological Survey
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Series and Number: Bulletin 527
- Publication Date: 1913
- Map Scale: 1:250,000
- Cross Section: None
- North Latitude: 46° 47' 49" N (46.7970)
- South Latitude: 46° 12' 4" N (46.2010)
- East Longitude: 111° 49' 44" W (-111.8290)
- West Longitude: 112° 30' 0" W (-112.5000)
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.