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Alluvial fan as edited by
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An
alluvial fan is a fan-shaped pile of
sediment that forms where a rapidly flowing mountain
stream enters a relatively flat
valley. As water slows down, it deposits
sediment (
alluvium) that gradually builds a fan.
[1]
References
- ↑ http://wrgis.wr.usgs.gov/docs/parks/misc/glossaryAtoC.html