| Lat / long: | 48.62671, -121.90264 |
| Tertiary: | Chromium, Iron |
| Other material: | Chromite, Enstatite, Magnetite, Olivine, Serpentine |
| Discovery year: | 1940 |
| Operation type: | Surface |
| Development status: | Occurrence |
| MAS | 530570013 |
| DEP | 10252767 |
| Reference | {Deposit:: GAUDETTE, H.E., GEOCHEMISTRY OF THE TWIN SISTERS}{Deposit:: ULTRAMAFIC BODY, WASHINGTON, UNPUB. THESIS, UNIV. OF}{Deposit:: ILLINOIS, 1953.}{Deposit:: WASH, DIV. OF MINES AND GEOL. BULL. 37, 1956.}{Deposit:: CHROMITE DEPOSITS OF TWIN SISTERS MTS., WASHINGTON.}{Deposit:: SHINE MING CO CONFIDENTIAL RPT 1942 FILES USBM WFOC} |
| Reporter | Lucas, J.M. |