alluvial fan
alluvial fan
alluvial fan
n.（名词）
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.
冲积扇：指储藏在峡谷山口或在支流与干流交汇处的扇形沉积物
alluvial fan
alluvial fan
n.（名词）
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.
冲积扇：指储藏在峡谷山口或在支流与干流交汇处的扇形沉积物
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