Union Gulch
Past ProducerCopperUSGS MRDS
Location
| State | California |
| County | Marin |
| Coordinates | 37.97156, -122.73245 |
Commodities
| Primary | Copper |
| Secondary | Silver, Gold |
Mine Details
| Status | Past Producer |
| Discovery Year | 1863 |
| Data Source | USGS MRDS |
| Source ID | 10030803 |