| Lat / long: | 37.61271, -121.57793 |
| Tertiary: | Manganese |
| Discovery year: | 1891 |
| Operation type: | Surface |
| Development status: | Past Producer |
| MRDS | M004683 |
| MAS | 60010001 |
| DEP | 10186945 |
| Reference | CALIF JOUR MINES & GEO V 46 NO 2 APR 1950 P 343 P1 58 |
| Reporter | Western Field Operations Center (WFOC) |