| Location: | Contra Costa County, California, United States, North America |
| Lat / long: | 37.9899, -121.81548 |
| dep_id: | 10029555 |
| mrds_id: | M007169 |
| Commodity type: | nonmetallic |
| Major mineral: | Stone |
| Operation type: | Unknown |
| Production size: | No production occurred |
| Development status: | Occurrence |
| Reporter: | Gere, W. |
| References: |
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