| Lat / long: | 45.51658, -111.53696 |
| Primary: | Corundum |
| Secondary: | Kyanite |
| Ore: | Corundum, Sillimanite |
| Gangue: | Feldspar, Muscovite |
| Orebody form: | LENS |
| Operation type: | Unknown |
| Deposit type: | Metamorphic |
| Production size: | None |
| Development status: | Occurrence |
| Host rock: | Pony Series-Biotite Gneiss, Quartzite |
| Host type: | Gneiss |
| Associated rock: | Pegmatite |
| Associated type: | Pegmatite |
| Alteration processes: | Sericitization |
| MRDS | W007481 |
| DEP | 10069794 |
| Reference | {Deposit:: CLABAUGH, S. E., AND ARMSTRONG, F. C., 1950, CORUNDUM DEPOSITS OF GALLATIN AND MADISON COUNTIES, MONT.: U.S. GEOLOGICAL SURVEY BULL. 969 - B.}{Deposit:: HEINRICH, E.W., 1948, DEPOSITS OF THE SILLIMANITE GROUP OF MINERALS SOUTH OF ENNIS, MADISON CO, MONT., MONT. BUR. OF MINES & GEOL., MISC. CONT. 10, P. 18}{Deposit:: USBM INF CIRC 7641, P. 45.}{Deposit:: 1950 COMPILE CLABAUGH, ARMSTRONG, BULL 969-} |
| Reporter | Espenshade, Gilbert H., Doyle, Brien (Wells, John) |