(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 Magnetic North • Elizabeth Robins (C. E. Raimond) — A History of Science, Volume 3(of 5) • Henry Smith Williams — The Trumpeter Swan • Temple Bailey — Chronicles of Border Warfare • Alexander Scott Withers — The Common Law • Robert W. Chambers |
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