| Location: | Alameda County, California, United States, North America |
| Lat / long: | 37.88573, -122.26244 |
| dep_id: | 10102588 |
| mrds_id: | M004715 |
| Commodity type: | metallic |
| Major mineral: | Sulfur-Pyrite, Copper |
| Trace mineral: | Lead |
| Operation type: | Unknown |
| Production size: | Small ammount of material produced |
| Development status: | Past Producer |
| ore: | Galena, Pyrite |
| orebody_fm: | LENTICULAR |
| work_type: | Underground |
| conc_proc: | Leaching |
| ore_ctrl: | Fractures |
| Reporter: | Gere, W., Fraticelli, L. A. (Albers, J.) |
| hrock_unit: | Leona Rhyolite |
| hrock_type: | Rhyolite |
| Structure: | Hayward Fault; Two Parallel Smaller Faults With Horizontal Displacement. |
| prod_yrs: | 1925 - 1929 |
| References: |
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