| Location: | Contra Costa County, California, United States, North America |
| Lat / long: | 37.90629, -121.92965 |
| dep_id: | 10029569 |
| mrds_id: | M007205 |
| Commodity type: | metallic |
| Major mineral: | Silver, Gold |
| Operation type: | Unknown |
| Production size: | No production occurred |
| Development status: | Occurrence |
| Reporter: | Gere, W. |
| References: |
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