| Lat / long: | 38.78071, -122.81886 |
| Primary: | Mercury |
| Ore: | Cinnabar, Mercury, Metacinnabar |
| Gangue: | Calcite, Pyrite, Quartz |
| Discovery year: | 1872 |
| Operation type: | Unknown |
| Production size: | Medium |
| Development status: | Producer |
| Production years: | 1874 - 1880, 1900 - 1908, 1910 - 1912, 1915 - 1919, 1931 - 1932, 1934 - 1947, 1949 |
| First production started: | 1874 |
| Host rock: | Franciscan Complex |
| Host type: | Serpentinite |
| Structure: | Minor Faults Trending Nw |
| Alteration processes: | Silica Carbonate Alteration Of Serpentine |
| MRDS | M055699 |
| DEP | 10040824 |
| Reference | {Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252}{Deposit:: BAILEY, E. H., USGS, PERSONAL FILES}{Deposit:: BAILEY, E. H., 1946, QUICKSILVER DEPOSITS OF THE WESTERN MAYACMAS DISTRICT, SONOMA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, P. 199 - 230}{Deposit:: HONKE, M.T., JR. AND VER PLANCK, W.E., JR., 1950, MINES AND MINERAL RESOURCES OF SONOMA COUNTY, CALIF.: CJMG, V. 46, P. 98-105}{Production:: USBM DATA} |
| Reporter | Peterson, Jocelyn A. |