Alluvium
Loose soil or sediment that is eroded and redeposited in a non-marine setting / From Wikipedia, the free encyclopedia
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"Alluvial" redirects here. Not to be confused with Alluvial (horse) or Alluvial diagram.
Alluvium (from Latin alluvius, from alluere 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings.[1][2][3] Alluvium is also sometimes called alluvial deposit.[4][5] Alluvium is typically geologically young and is not consolidated into solid rock. Sediments deposited underwater, in seas, estuaries, lakes, or ponds, are not described as alluvium.[1] Floodplain alluvium can be highly fertile, and supported some of the earliest human civilizations.[6]