| Location: | Contra Costa County, California, United States, North America |
| Lat / long: | 37.94796, -122.41522 |
| dep_id: | 10110640 |
| mrds_id: | W023547 |
| Commodity type: | nonmetallic |
| Major mineral: | Stone |
| Operation type: | Unknown |
| Production size: | Production occurred |
| Development status: | Producer |
| Reporter: | Unknown |
| References: |
|