| Lat / long: | 37.61931, -121.61523 |
| Tertiary: | Manganese, Silica, Zeolites, Iron |
| Other material: | Chert, Limonite, Psilomelane, Quartz, Zeolite |
| Discovery year: | 1884 |
| Operation type: | Underground |
| Development status: | Past Producer |
| First production started: | 1885 |
| MRDS | M004664 |
| MAS | 60010002 |
| DEP | 10211739 |
| Reference | {Deposit:: CDMG,BULL.76,1918}{Deposit:: CDMG,BULL.152,1950}{Deposit:: CDMG.,BULL.125,1943}{Deposit:: CDMG,BULL.140} |
| Reporter | Deino, Al |