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← GeographyWhich outcome commonly results when substantial sediment deposition obstructs a river's main channel in a floodplain?
A)Oxbow lake formation initiation✓
B)Increased levee subsidence rates
C)Amplified coastal delta progradation
D)Enhanced river water column mixing
💡 Explanation
When deposition blocks the primary channel, waters divert through a steeper gradient pathway via channel avulsion because this path offers lower hydraulic resistance; therefore an oxbow lake forms in the abandoned bend, rather than delta growth or mixing.
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