Mineral Resources of the United States, 1917--Part I--Metals . cksilver Mining Co.), in San BenitoCounty; the Belt (La Libertad), Cambria, Keystone, Little Bonanza,Tartaglia, and Huasna, in San Luis Obispo County; the Acachumaand Los Prietos, in Santa Barbara County; and the Mercy, in FresnoCounty. In some of these mines the serpentine is present only asnarrow dikes or tongues entirely altered to one of the varieties of quicksilver rock, which to the inexperienced eye may not berecognized as having once been serpentine. Mines in which the oreoccurs wholly or partly in sandstone or shale are th
Mineral Resources of the United States, 1917--Part I--Metals . cksilver Mining Co.), in San BenitoCounty; the Belt (La Libertad), Cambria, Keystone, Little Bonanza,Tartaglia, and Huasna, in San Luis Obispo County; the Acachumaand Los Prietos, in Santa Barbara County; and the Mercy, in FresnoCounty. In some of these mines the serpentine is present only asnarrow dikes or tongues entirely altered to one of the varieties of quicksilver rock, which to the inexperienced eye may not berecognized as having once been serpentine. Mines in which the oreoccurs wholly or partly in sandstone or shale are the Manzanita, inColusa County; the Sulphur Bank, in Lake County; the Oat Hill, inNapa County; the Eureka and Socrates, in Sonoma County; the NewIdria, Wonder, Florence Mac, Cerro Bonito, and Del Mexico, in SanBenito County; and the Oceanic, Klau, and Capitola, in San LuisObispo County. Mines in which the ore occurs wholly or in part inradiolarian chert are the Great Western and Big Chief, in LakeCounty, and the Cloverdale. in Sonoma County. Mines in which the. MAP SHOWING THE LOCATION OF THE KJJOWN QUICKSILVER DEPOSITS OP THE IKITED STATES QUICKSILVER. 389 ore occurs in unserpentinized dikes or small intrusive masses arethe Star and Silver Bow workings of the Aetna mine, in Napa Coun-ty ; the St. Johns, in Solano County; the Cuddeback, in Kern County;and, to a small extent, the New Iclria, in San Benito County. Minesin which the ore occurs partly or wholly in lava or tuff are theSulphur Bank, in Lake,County; the Manhattan, in Napa County;and probably the Brownlie and Hastings, in Solano County, althoughthe exact nature of the ore-bearing rock of these two mines is as yetin doubt. In Oregon cinnabar is widely distributed, but only one deposit,the metallized fissure zone in andesite at Blackbutte, in LaneCounty, is at present commercially productive. In Washington cinnabar has been found at a few localities inChelan, Kittitas, and Lewis counties. None of the deposits hasyet proved
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