GriphiteSitting Bull pegmatite, Keystone, Keystone District, Pennington Co., South Dakota, USA
Latitude: 43°54'2"N
Longitude: 103°26'13"W
1 mile northwest of town
Mineral List
15 entries listed. 11 valid minerals.
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References
Norton, James J. (1964) Pegmatites and other Precambrian Rocks in the Southern Black Hills; Geology and mineral deposits of some pegmatites in the southern Black Hills, South Dakota. USGS Professional Paper 297E.