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← GeographyWhich outcome occurs when rapid sedimentation chokes an alluvial fan?
A)Increased stream channel avulsion frequency✓
B)Enhanced chemical weathering of surrounding rocks
C)Decreased floodplain soil fertility
D)Stabilization of riparian vegetation zones
💡 Explanation
Increased channel avulsion occurs, because sediment buildup causes a blockage forcing the stream to find a new path. This occurs via channel avulsion, rather than focused erosion, because lateral constraint is reduced; deposition continues, creating new obstructions.
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