sluicing

sluicing

Surface mining method which utilizes a sloping wooden trough or a ditch cut in hard gravel or rock as a channel, along which gold-bearing sediment is carried by a stream of water. Bars placed transversally along the bottom cause the water to eddy into small basins, so that the ore may settle and be collected. Sources: Mining Dictionary; Random House Webster's Unabridged Dictionary.

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Blossary: Mining Techniques
Industry/Domain: Mining
Category: Gold mining
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Industry/Domain: Mathematics Category: Measurements

metric time

Metric time is the measure of time interval using the metric system, which defines the second as the base unit of time, and multiple and submultiple ...