Triangle A Lode (Triangle Mine), Custer District, Custer Co., South Dakota, USA
REF:Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707P.177
Deposit:: STATE, S.D.M.I.R., ANNUAL
Production:: USBM INFO CIRC 7707.
Commodities (Major) - Feldspar
Development Status: Past Producer
Host Rock: Pegmatite
Tectonic Structure: Southern Black Hills
| 'K Feldspar'|| Quartz|| 'Tourmaline'|| Uraninite|
4 entries listed. 2 valid minerals.
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