The quicksilver resources of California . SONOMA COUNTY. 101 slope of the ridge by three open cuts, forming a nearly continu-ous line of workings [see photograph Fig. 35, Ki, K., and K3J;the open cut at the top of the ridge (Ki) is 60 feet high and48 feet wide, and furnishes at present, practically without sort-ing, all the ore run during the summer season through thefurnace, which has a capacity of 7 tons of ore per day andproduces from 45 to 50 flasks per month. The more compactand regularly bedded part of the ledge carries the metal mostlyas face metal and incrustations in the fissures; the
The quicksilver resources of California . SONOMA COUNTY. 101 slope of the ridge by three open cuts, forming a nearly continu-ous line of workings [see photograph Fig. 35, Ki, K., and K3J;the open cut at the top of the ridge (Ki) is 60 feet high and48 feet wide, and furnishes at present, practically without sort-ing, all the ore run during the summer season through thefurnace, which has a capacity of 7 tons of ore per day andproduces from 45 to 50 flasks per month. The more compactand regularly bedded part of the ledge carries the metal mostlyas face metal and incrustations in the fissures; the crushedportions are much richer and carry the metal more in seamsand bunches. /i//3 S <k tt £/ » f. Fig. 36. Cloverdale Mine—Plan and section of Murphy tunnel. The next ledge. No. 3, is only separated from Xo. 2 b} anarrow belt of sandstone, and has been extensively worked byopen cut in the Old Ray workings on the north slope. Itshows onl}^ slightly on the south slope of the ridge, principallyin the mouth of the Murphy tunnel. [6, Fig. 35.] Ledge No. 4, or Murphy ledge, shows principally in theMurphy tunnel. It is about 25 feet wide. [See Fig. 36.] Thechert beds are mostly from one to three inches wide, the grayclay seams one quarter to one inch ; cinnabar ore making prin-cipally on the faces, richer nearer the hanging wall, which ispeculiarly interstratified, as above mentioned, with clay seamslike the chert beds. These chert beds, wherein the cinnabar 102 QUICKSILVER RESOURCES OF CALIFORNIA. ore makes, are ven,- similar to the ledge matter of the GreatWestern. The company has a small incline furnace of 7 tons capacityper day, and a lo-pipe retort furnace. Qyde Mine.—Mayacmas D
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
