| Location: | Alameda County, California, United States, North America |
| Lat / long: | 37.60411, -121.63353 |
| dep_id: | 10138710 |
| mrds_id: | M004660 |
| mas_id: | 60010021 |
| Commodity type: | metallic |
| Trace mineral: | Manganese, Silica |
| Operation type: | Surface |
| Development status: | Past Producer |
| other_matl: | Chert, Jasper, Psilomelane, Pyrolusite |
| Reporter: | Deino, Al |
| Year first produced: | 1917 |
| disc_yr: | 1916 |
| References: |
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