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a brief history of mining operations in pima county in philippines

a brief history of mining operations in pima county in philippines

Arizonas placermining industry began in 1774 when Padre Manuel Lopez reportedly directed Papago Indians in mining the goldbearing gravels along the flanks of the Quijotoa Mountains Pima County Placer mining was active in that region from 1774 to 1849 when the discovery of gold in California apparently attracted many of the Mexican miners

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