| Lat / long: | 42.32824, -108.89652 |
| Primary: | Pumice |
| Operation type: | Unknown |
| Development status: | Occurrence |
| MAS | 560131191 |
| DEP | 10303314 |
| Reference | {Deposit:: UPPER CHADRON FM CONTAINS FINE- GRAINED PARIALLY DEVITRIFIED}{Deposit:: VOLCANIC GLASS WITH TRACES OF QUARTZ}{Deposit:: WYO GEOL SURV BULL 50 1966 P237} |
| Reporter | South Dakota School of Mines |