South Dakota · Custer County
Past Producer
Apex Claim
Custer County, South Dakota, United States
Mica
Beryllium
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USGS source ↗
Commodities
Primary
Mica, Beryllium
Commodity type
B
Deposit
Deposit size
S
Workings
Surface
Orebody form
BRANCHING
Materials
Ore minerals
Beryl, Muscovite
Geology
Host rock
Quartzite
Associated rock
Pegmatite
Tectonic setting
Southern Black Hills
Economic & production
Development status
Past Producer
Identification
Deposit ID
10101680
MRDS ID
D007179
Region
NA
Data score
C
Coordinates
43.60357, -103.51834
References
U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707