Bulletin . MtU z T- % ^ CO u q: ^:z o 00Q: -J ^ c\2 -J o ^ oc V5 o <j—3^(j 330 CALIFORNIA STATE MINING BUREAU. and coatinjis of cinnabar on the serpentine fragments. The miner-alized zone as revealed at that time was abont 20 in average width,with a dip of abont 40° N. and strike of a few degrees X. of its width prominent streaks of dark clay selvage occur, andin places form an alta, but the country rock is serpentine en bothsides. As above noted, the ground is heavy, and carries a good deal of. Photo No. 27. Detail of tramway and ore-bin, Cambria Mine, San LuisObispo County
Bulletin . MtU z T- % ^ CO u q: ^:z o 00Q: -J ^ c\2 -J o ^ oc V5 o <j—3^(j 330 CALIFORNIA STATE MINING BUREAU. and coatinjis of cinnabar on the serpentine fragments. The miner-alized zone as revealed at that time was abont 20 in average width,with a dip of abont 40° N. and strike of a few degrees X. of its width prominent streaks of dark clay selvage occur, andin places form an alta, but the country rock is serpentine en bothsides. As above noted, the ground is heavy, and carries a good deal of. Photo No. 27. Detail of tramway and ore-bin, Cambria Mine, San LuisObispo County. Photo by E. W. Carson. water in places. Square setting with round timbers is employed andclose lagging is needed at times. The furnace was put in operation in the summer of 1915 on surfaceore of low grade from tlie croppings, but considerable difficultyresulted, as the rock was a clayey, highly altered serpentine, carryingconsiderable water. In October, the reduction of ore from the under-ground workings began, and production couliinicd up to August. 1!)16. RESOURCES. 131 Since that date, the pro])erty has been idle; but it is i-cported that thereare prospects of a reopening this spring (1918). The reduction equipment includes a oO-ton Scott furnace built in1906 at a cost of .^ with 8 brick condensers, one D retort, an8xl2 Hercules-Blake cinsher. and a 40 h. p. Fairbanks-Morse com-pressor. From mine to the ore is hand-trammed in one-toncars. Storage equipment consists of two
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