Malachite from Walkerville, Butte Mining District (Summit Valley Mining District), Silver Bow County, Montana, USA
USA | |
| Weed, W.H. (1912) Geology and ore deposits of the Butte district, Montana. Professional Paper 74. US Geological Survey doi:10.3133/pp74 |
Weed, W.H. (1912) Geology and ore deposits of the Butte district, Montana. Professional Paper 74. US Geological Survey doi:10.3133/pp74 |