| Lat / long: | 38.99531, -77.16885 |
| Primary: | Silica |
| Ore: | Gneiss |
| Operation type: | Unknown |
| Deposit type: | Metamorphic |
| Production size: | Yes |
| Development status: | Producer |
| MRDS | W019898 |
| DEP | 10110574 |
| Reference | {Deposit:: EDWARDS, JR., J., 1971, MARYLAND I.C. 11, P. 13.}{Deposit:: GNESS QUARRY IS OPERATED BY TOMS RUN QUARRIES.}{Deposit:: OPERATION PRODUCES SILICA SAND.} |
| Reporter | Unknown |