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Placer mining is the technique by which gold that has accumulated in a placer deposit is extracted. Placer deposits are composed of relatively loose material that ......
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Summary of Gold Mining Techniques in . Western United States. 1842 - 1996 . Placer Mining. The first tools used to mine gold were extremely simple, knives ......
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The gold rushes of the 1850s were a time of unparalleled social and economic development, when mining techniques leap-frogged from the rudimentary to the ......
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