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Comstock Lode. 1. the most valuable deposit of silver ore ever recorded, discovered in 1859 by Henry T. P. Comstock near Virginia City, Nevada.
Mining on the Comstock, depicting the headframes and mills of the various mines, and mining technology used at Comstock, most prominently the method of square-set timbering developed there to work the veins. Comstock Lode geologic map, north. Ophir is in the top center.