Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment. This technique is often employed to extract gold or other valuable minerals from alluvial deposits, where these elements are mixed in with soil or gravel. The process involves directing high-pressure streams of water onto a hillside or riverbank, which breaks apart the ground material and washes it down into sluices or other collection devices where the valuable minerals can be separated from the less valuable materials.
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