| Lat / long: | 48.71537, -121.95568 |
| Primary: | Chromium |
| Ore: | Chromite |
| Gangue: | Anthophyllite, Clinochlore, Magnetite, Olivine, Prehnite, Pyroxene, Serpentine, Staurolite, Tourmaline |
| Orebody form: | LENSES AND PODS |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| Host rock: | Twin Sisters Dunite |
| Host type: | Dunite |
| Tectonic: | Cascade Volcanic Arc |
| Alteration processes: | Dunite Is Serpentinized |
| MRDS | MP00127 |
| DEP | 10048535 |
| Reference | {Deposit:: DERKEY, R.E., JOSEPH, N.L., AND LASMANIS, RAYMOND, 1990, METAL MINES OF WASHINGTON - PRELIMINARY REPORT: WASHINGTON DIVISION OF GEOLOGY AND EARTH RESOURCES OPEN-FILE REPORT 90-18, P. 566.}{Deposit:: HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS - PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 42.}{Production:: HUNTTING, 1956} |
| Reporter | Peterson, Jocelyn A. |