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← GeographyWhich land shift results when sediment flux overwhelms fluvial avulsion?
A)Progradation of an alluvial fan✓
B)Formation of a levee system
C)Cutoff causing an oxbow lake
D)Deepening of the stream channel
💡 Explanation
Progradation occurs because stream load surpasses transport capacity—driving deposition—rather than channel incision, as sediment deposition dominates using the mechanism of aggradation. Therefore, the fan expands outward, rather than forming levees or oxbow lakes
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