There are different types of fans. The feature is created by deposition from rivers is the alluvial fan.
- An alluvial fan is known to be a deposit of gravel, sand, and other smaller pieces of sediment.
This sediment is popularly known as alluvium. These fans are said to be formed as flowing water comes together with mountains, hills, or the steep walls of canyons.
The fans are known to be of good and economic importance to society, especially in arid and semiarid areas where they are the groundwater source that is used for irrigation farming.
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