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Why does an alluvial fan have a fan-like shape?

Answer and explanation

Correct answer: The stream spreads out and loses velocity on a plain

An alluvial fan forms where a stream leaves a steep, confined mountain valley and reaches a flatter plain. The sudden decrease in gradient makes the channel spread into several shallow paths, reducing velocity and carrying capacity. Sediment is then deposited outward in a widening, fan-shaped pattern. Wave erosion, glacier movement, and limestone dissolution describe different environments.

Related tags

Alluvial FanRiver DepositionSlope ChangeFluvial LandformsAccounting Applications Of Electronic SpreadsheetsComputerized Accounting & Database SystemComputerized Accounting Database SystemAccountancy

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