placer mining

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placer mining:

see miningmining,
extraction of solid mineral resources from the earth. These resources include ores, which contain commercially valuable amounts of metals, such as iron and aluminum; precious stones, such as diamonds; building stones, such as granite; and solid fuels, such as coal and
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placer mining

[′plās·ər ‚mīn·iŋ]
(mining engineering)
The extraction and concentration of heavy metals from placers.
Mining of gold by washing the sand, gravel, or talus.
References in periodicals archive ?
But those 49ers would recognize the gold pans and water sluices still used to find the elusive metal.
But, however they start, either would certainly be happy enough if their stint in Old Gold pans out the way of another goal-hunter who made his Wolves bow down at Home Park - one Alexander Derek Dougan.
The matt surface of modern plastic gold pans make panning a lot easier than the metal pans of old.
The gold/sand mixture is then placed in shallow, water-filled, children's swimming pools and panned using commercial gold pans.
Klondike gold stampeders used basic technology--rockers, sluice boxes, pickaxes, gold pans, steam points--to recover gold that had been washed downstream in rivers dinosaurs drank from eons ago.
Our thanks to Alaska Used Computer Source for the lap-top and to Alaska Mining & Diving Supply for the gold pans used on our cover.