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单词 alluvial fan
释义

WordReference Random House Unabridged Dictionary of American English © 2024
alluvial fan, [Physical Geog.]
  1. Geography, Geologya fan-shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine or at the foot of a mountain. Also called alluvial cone. 
  • 1870–75

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更新时间:2024/9/20 5:36:47