Copper from selected localities.
USA | |
| Mineralogical Record 33:1 |
Mineralogical Record 33:1 | |
Weed, W.H. (1912) Geology and Ore Deposits of the Butte District, Montana. United States Geological Survey, Professional Paper 74, 262 pages plus plates.; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
Mineralogical Record 33:1 |
Continental Pit, Butte Mining District, Silver Bow County, Montana, USA