South Dakota · Custer County
Past Producer

Big Tom Mine

Custer County, South Dakota, United States
FeldsparBerylliumMica
⌖ Show on mapUSGS source ↗
Commodities
PrimaryFeldspar
TertiaryBeryllium, Mica
Commodity typeB
Economic & production
Development statusPast Producer
Identification
Deposit ID10299063
Alternate namesKem Lode, Helen Beryl
RegionNA
Data scoreD
Coordinates43.70466, -103.69697
References
GRIES,J.P.,1950,USBM R.I.4396PAGE,L.R.,ET AL, 1953,USGS PROF.PAPER 247.PP.128-131USBM STAFF,1955,REG.V,I.C.7707.PP.146-147