Old Spanish Arrastra
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Unknown Unknown 1600.0253.0000.jpg M - 253 B&W 1600-0253-0000 m253p Print <2x3 Historic Photographs 1930s Reproduction requires permission. Digital images property of SHM Library & ArchivesDescription
A old Spanish Arrastra located on the "Josephine Mine" property on the old Jersey Lily Road about four miles south of Prescott, Yavapai County, Arizona.
An arrastra was a primitive technology used to crush ore into a fine enough powder so that precious ores could be separated from host rock. Arrastras (also “rastra” or “arastra”) had their origins in Mexico. These devices consisted of a flat track of stone inside a low wall of rock or wood, a retaining basin to capture and hold the ore, and a center post and horizontal shaft made of wood or from small tree trunks. The ease by which they were built and operated made them ideally suited to small mining operations. Powered by horse or mule, the shaft would drag one or more large stones in a circular path on top of the flat stone base, crushing the ore that has been placed in the basin. Mercury was added to the resulting mix to help capture the gold as it was separated from the pulverized rock. Stamp mills replaced arrastras at most larger mining operations when adequate capital was available.
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