South Dakota · Custer County
Past Producer
Big Thom No 1
Custer County, South Dakota, United States
Mica
Beryllium
Feldspar
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USGS source ↗
Commodities
Primary
Mica
Tertiary
Beryllium, Feldspar
Commodity type
B
Economic & production
Development status
Past Producer
Identification
Deposit ID
10274985
Region
NA
Data score
D
Coordinates
43.71806, -103.69947
References
REDDEN,J.A.,1963,USGS PROF.PAPER 297-D,P.275