Flagstone Mines in Maryland
3Total Sites
1Active
Flagstone Mining in Maryland
Maryland has 3 flagstone-related mine and mineral deposit locations recorded in federal databases. Of these, 1 are currently active operations. Data comes from the USGS Mineral Resources Data System and MSHA Mine Safety and Health Administration records.
By County
| County | Sites |
|---|---|
| Calvert County | 1 |
| Garrett County | 1 |
| Prince George's County | 1 |
Flagstone Mines
| Mine | County | Type | Status |
|---|---|---|---|
| Hoyes Quarry and Plant | Garrett | Surface | Producer |
| Kaylorite Corp. Greensand Pit | Calvert | Surface | Past Producer |
| Unnamed Sandstone Quarry | Prince George's | Surface | Past Producer |