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Effects of Hydraulic Mining 2

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By no other means does man more completely change the face of nature than by this process of hydraulic mining. Hills melt away and disappear under its influence, every winter’s freshets carrying to lower and yet lower points portions of the detritus, while whole valleys are filled with clean washed boulders of quartz and other rocks. Meanwhile the Sacramento and its branches, as well as the San Joaquin, flow turbid with mud. Bars are formed where none existed before, and the hydrography of the Bay of San Francisco is changing under the influence of the same causes. (Titus Cronise, 1868)

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