| Lat / long: | 37.88573, -122.26244 |
| Primary: | Sulfur-Pyrite, Copper |
| Tertiary: | Lead |
| Ore: | Galena, Pyrite |
| Orebody form: | LENTICULAR |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| Production years: | 1925 - 1929 |
| Host rock: | Leona Rhyolite |
| Host type: | Rhyolite |
| Structure: | Hayward Fault; Two Parallel Smaller Faults With Horizontal Displacement. |
| MRDS | M004715 |
| DEP | 10102588 |
| Reference | {Deposit:: DAVIS, F.F., 1950 ; MINES AND MINERAL RESOURCES OF ALAMEDA COUNTY: CALIF. JOUR. MINES AND GEOLOGY, VOL. 46 , NO. 2 ; DIV. OF MINES, P. 298}{Deposit:: GOODWIN, J.G., 1957 ; LEAD AND ZINC IN CALIFORNIA; CALIF. JOUR. MINES AND GEOLOGY, VOL. 53, NOS. 3 & 4 ; DIV. OF MINES, P. 412}{Deposit:: LAIZURE, C.V., 1929 ; SAN FRANCISCO FIELD DIV.; 25TH REPT. STATE MIN.; CALIF. DIV. OF MINES, P. 440 .} |
| Reporter | Gere, W., Fraticelli, L. A. (Albers, J.) |