Caryopilite from Spenceville Mining District, Nevada County, California, USA
USA | |
| Flohr, M.J.K. (1982) Geochemistry and origin of the Bald Knob manganese deposit, North Carolina. Economic Geology: 87(8): 2023-2040. |
| Flohr, M.J.K. (1982) Geochemistry and origin of the Bald Knob manganese deposit, North Carolina. Economic Geology: 87(8): 2023-2040. |