| Location: | Alameda County, California, United States, North America |
| Lat / long: | 37.61685, -121.67131 |
| dep_id: | 10095036 |
| mrds_id: | M004658 |
| Commodity type: | metallic |
| Trace mineral: | Manganese |
| Operation type: | Unknown |
| Production size: | No production occurred |
| Development status: | Occurrence |
| ore: | Psilomelane |
| Reporter: | Gere, W., Von Dohlen, E.; Albers, J. |
| References: |
- Deposit:: CALIF. JOUR. MINES & GEOL. V. 46, NO.2, APRIL 1950, P.344, PL. 58
- Deposit:: DOM BULL. 125, P.100
- Deposit:: BULL. 152, P.22
- Deposit:: BULL. 140 P. 68 , PL. 1
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