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4 October, 22:54

How are placer mining, hydraulic mining, and hard-rock mining different?

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  1. 4 October, 23:24
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    These are different because the way the rock is worked differs, as well as the type of rock.
  2. 5 October, 00:21
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    placer mining, hydraulic mining method od mining that uses water under high pressure to blast away gravel and dirt to expose the minerals underneath.
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