| 释义 |
alluvial fan
alluvial fann. A fan-shaped accumulation of alluvium deposited at the mouth of a ravine or at the juncture of a tributary stream with the main stream.alluvial fan or alluvial conen (Geological Science) a fan-shaped accumulation of silt, sand, gravel, and boulders deposited by fast-flowing mountain rivers when they reach flatter landallu′vial fan′
n. a fan-shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine. al·lu·vi·al fan (ə-lo͞o′vē-əl) A fan-shaped mass of sediment, especially silt, sand, gravel, and boulders, deposited by a river when its flow is suddenly slowed. Alluvial fans typically form where a river pours out from a steep valley through mountains onto a flat plain. Unlike deltas, they are not deposited into a body of standing water.Thesaurus| Noun | 1. | alluvial fan - a fan-shaped deposit where a fast flowing stream flattens outalluvial conegeological phenomenon - a natural phenomenon involving the structure or composition of the earth |
alluvial fan
Synonyms for alluvial fannoun a fan-shaped deposit where a fast flowing stream flattens outSynonymsRelated Words |