| Location: | Marin County, California, United States, North America |
| Lat / long: | 38.20656, -122.7305 |
| dep_id: | 10030806 |
| mrds_id: | M009233 |
| Commodity type: | nonmetallic |
| Major mineral: | Stone |
| Operation type: | Unknown |
| Production size: | No production occurred |
| Development status: | Occurrence |
| Reporter: | Gere, W. |