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Broadgauge - Tamarack Mines, Sheridan District (Mill Creek District; Wisconsin District), Madison Co., Montana, USA
Latitude: 45°28'52"N
Longitude: 112°7'49"W
Longitude: 112°7'49"W
Deposit:: USBM IC 6972.
Deposit:: LAWSON, 1974, DIRECTORY OF MINING ENTERPRISES FOR 1974. MT. BUREAU OF MINES & GEOLOGY BULL. 95.
Deposit:: MBMG MEM 41, P. 17.
Deposit:: MBMG BULL. 100, 1976, P.15
Deposit:: MBM & G MEM 31, 1950, P63
Deposit:: MBM & G MEM 20, 1940, P64
Deposit:: MBM & G MEM 15, 1935, P47
Production:: LORAIN, 1937, U. S. B. M. INF. CIRC. 6972.
Commodities (Major) - Silver, Gold
Development Status: Producer
Host Rock Unit: Pony Formation, Gneiss
Structure: Tobacco Root Batholith, Fractures Trending E-W, 30 E, (The Tamarack Vein), Regional Joint System Trends N30e, 45w (Broadgauge Vein)
Host Rock: Limestone, Gneiss
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