alluvion

Noun
  1. Gradual formation of new land, by recession of the sea or deposit of sediment (synset 113450473)
    is a type of: geologic process, geological process - (geology) a natural process whereby geological features are modified
  2. The rising of a body of water and its overflowing onto normally dry land (synset 111475008)
    "plains fertilized by annual inundations"
    is a type of: geological phenomenon - a natural phenomenon involving the structure or composition of the earth
    subtypes:
    • debacle - flooding caused by a tumultuous breakup of ice in a river during the spring or summer
    • flash flood, flashflood - a sudden local flood of great volume and short duration
    • noachian deluge, noah and the flood, noah's flood, the flood - (Biblical) the great deluge that is said in the Book of Genesis to have occurred in the time of Noah; it was brought by God upon the earth because of the wickedness of human beings
    same as: deluge, flood, inundation
  3. Clay or silt or gravel carried by rushing streams and deposited where the stream slows down (synset 109216160)
    is a type of: deposit, sediment - matter that has been deposited by some natural process
    subtypes:
    • delta - a low triangular area of alluvial deposits where a river divides before entering a larger body of water
    • placer - an alluvial deposit that contains particles of some valuable mineral
    substance holonym: alluvial soil - a fine-grained fertile soil deposited by water flowing over flood plains or in river beds
    same as: alluvial deposit, alluvial sediment, alluvium

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