alluvial sediment

Thesaurus

Noun

1.

alluvial sediment - clay or silt or gravel carried by rushing streams and deposited where the stream slows downalluvial deposit, alluvium, alluviondelta - a low triangular area of alluvial deposits where a river divides before entering a larger body of water; "the Mississippi River delta"; "the Nile delta"placer - an alluvial deposit that contains particles of some valuable mineralsediment, deposit - matter that has been deposited by some natural processalluvial soil - a fine-grained fertile soil deposited by water flowing over flood plains or in river beds