Keystone Mine
Past ProducerMercurySurface-UndergroundUSGS MRDS
Location
| State | California |
| County | San Luis Obispo |
| Coordinates | 35.65966, -121.07569 |
Commodities
| Primary | Mercury |
Mine Details
| Status | Past Producer |
| Type | Surface-Underground |
| Data Source | USGS MRDS |
| Source ID | 10165233 |