Potrero, CA Silica Mines
Silica Mines in Potrero, California
| Mine | Owner | Land Status | Work Type | Minerals |
|---|---|---|---|---|
| Descanso Quarry | Southwest Silica Corp. | National Forest | Silica | |
| Round Potrero Deposit | Private | Silica | ||
| Unnamed | National Forest | Silica |
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