| Lat / long: | 37.37632, -121.45772 |
| Tertiary: | Manganese, Silica |
| Other material: | Chert, Glaucophane, Psilomelane |
| Discovery year: | 1940 |
| Operation type: | Surface |
| Development status: | Past Producer |
| First production started: | 1941 |
| MRDS | W025091 |
| MAS | 60850018 |
| DEP | 10164842 |
| Reference | {Deposit:: TRASK-GEO DESCRIPTION CAL MN DEPS-CAL.DIV.OF MINES,BUL.152 A}{Deposit:: TRENGROVE,RR,1960,USBM. R.I.5579}{Deposit:: VOLIN-INVESTIG BLK WONDER MN DEPS-USBM RPT.OF INVEST.5254 SE} |
| Reporter | Deino, Al |