| Lat / long: | 48.71371, -121.95544 |
| Tertiary: | Arsenic, Chromium |
| Other material: | Chromite, Enstatite, Magnetite, Olivine, Serpentine |
| Discovery year: | 1934 |
| Operation type: | Surface |
| Development status: | Past Producer |
| MRDS | SP00568 |
| MAS | 530730003 |
| DEP | 10181332 |
| Reference | {Deposit:: GAUDETTE, H.E., GEOCHEMISTRY OF THE TWIN SISTERS}{Deposit:: ULTRAMAFIC BODY, WASHINGTON, UNPUB. THESIS, UNIV. OF}{Deposit:: ILLINOIS, 1953.}{Deposit:: WA. DIV. MINES AND GEOL. BULLETIN 37, 1956, PART II, VOL. 1,}{Deposit:: P. 42.}{Deposit:: WA. DIV. MINES AND GEOL. BULLETIN 57, 1969, TABLE 19, P. 68.} |
| Reporter | Ridenour, James |