South Dakota · Custer County
Occurrence
Big Horn Lode Prospect
Custer County, South Dakota, United States
Feldspar
Mica
⌖ Show on map
USGS source ↗
Commodities
Primary
Feldspar
Tertiary
Mica
Commodity type
N
Deposit
Deposit size
N
Workings
Surface
Materials
Ore minerals
Biotite, Feldspar
Gangue
Quartz, Tourmaline
Geology
Host rock
Schist
Associated rock
Pegmatite
Economic & production
Development status
Occurrence
Identification
Deposit ID
10095923
MRDS ID
SD02555
Region
NA
Data score
C
Coordinates
43.78496, -103.58389
References
USBM INFO CIRC 7707, P. 107