How does an alluvial fan form?

The sediment left behind that forms the alluvial fan is called alluvium. Alluvial fans are formed when water and sediments pass through a narrow gap between hills, mountains or canyon walls and then slows down and spread out when it reaches an open plain.

The dregs abandoned that structures the alluvial fan is called alluvium.

Explanation:

Alluvial fans are shaped when water and silt go through a thin hole between slopes, mountains or gulch dividers and afterward backs off and spread out when it arrives at an open plain.

They are framed where neighbouring alluvial fans feed into a shut framework valley. Ineffectively arranged, framework upheld silt with arbitrary cast direction and no sedimentary structures.

A territory of coarse grained silt brought onto the between bank zone when a levee breaks.