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← GeographyWhich deposition outcome characterizes rapid flow deceleration below a mountain range?
A)Formation of an alluvial fan✓
B)Creation of a barrier islands
C)Development of a braided stream
D)Carving of a deep canyon
💡 Explanation
Alluvial fans form because increased sediment load coupled with decreased channel slope promotes deposition. Water velocity slows quickly due to reduced gradient causing sediment to drop out, therefore forming an alluvial fan rather than other channel morphologies under different conditions.
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