(Mining) A trough or sluice having cleats, grooves, or steps across the bottom for holding quicksilver and catching particles of gold when auriferous earth is washed; also, one of the cleats, grooves, or steps in such a trough. Also called ripple.
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"Riffle" Quotes from Famous Books ![]() ![]() — The History of the American Expedition Fighting the Bolsheviki - Campaigning in North Russia 1918-1919 • Joel R. Moore ![]() ![]() — Boy Life - Stories and Readings Selected From The Works of William Dean Howells • William Dean Howells ![]() ![]() — The Banner Boy Scouts Snowbound - A Tour on Skates and Iceboats • George A. Warren |
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