Alluviation

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  1. The deposition or formation of alluvium or alluvial features (such as cones or fans) at places where stream velocity is decreased or streamflow is checked; the process of aggradation or of building up of sediments by a stream along its course, or of covering or filling a surface with alluvium. AGI
  2. A hydraulic effect on solids suspended in a current of water, whereby the coarsest and heaviest particles are the first to settle out, and the finest muds the last, as gradient or velocity of a stream is decreased. AGI
    Source: Dictionary of Mining, Mineral, and Related Terms


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