What is an aluvial fan?

Answer 1

Alluvial Fans

Where a stream flows out of a steep, narrow mountain valley, the stream suddenly becomes wider and shallower. The water slows down, Here sediments are deposited in an alluvial fan. An alluvial fan is a wide, sloping deposit of sediment formed where a stream leaves a mountain range. As its name suggests, this deposit is shaped like a fan.

Answer 2

An alluvial fan is a fan- or cone-shaped deposit of sediment crossed and built up by streams. They are usually created as flowing water interacts with mountains, hills, or the steep walls of canyons.

Answer 3

An alluvial fan is formed by weathered rocks at the top of the mountain eroding down to the bottom.

Answer 4

in the US.

Answer 5

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