Definitionn. an alluvial deposit that contains particles of some valuable mineral
Last update: June 22, 2015
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The first permanent settlements in Matto Grosso seem to have been made in 1718 and 1719, in the first year at Forquilha and in the second at or near the site of Cuyaba, where rich placer mines had been found. [Please select]
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Gold, or placer digging as it was called, was at its height. [Please select]
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The placer mines are again classified according to the manner in which, or the instruments with which they are wrought. [Please select]
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The board-sluice is the great washing machine, and the most important instrument used in the placer mining of California. [Please select]
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It washes nearly all the dirt and catches nearly all the placer gold of the country. [Please select]
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The instruments used by the prospector for placer-mines are usually the pan, pick and shovel. [Please select]
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Quartz requires a mill and water-power; placer dirt is washed in a simple sluice. [Please select]
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