Thelma and Mammoth
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| Site Name : | Thelma and Mammoth |
| State : | California |
| County : | San Bernardino |
| Latitude : | 35.27361 |
| Longitude : | -116.1928 |
| Year Discovered : | |
| Years in Production : | |
| Operation Type : | Unknown |
| Deposit Type : | Vein |
| Production Size : | N |
| Development Status : | Occurrence |
| Primary Commodities : | |
| Secondary Commodities : | |
| Other Commodities : | Copper, Gold, Silver |