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How is the combined effect of river erosion and deposition seen in oxbow lake formation?

Answer and explanation

Correct answer: The meander neck is cut and the old bend is separated

The direct answer is C, the meander neck is cut and the old bend becomes separated. In a floodplain, a river often curves in a loop called a meander. Water flows faster on the outer bank and erodes it, while slower water on the inner bank deposits sediment. The two ends of the loop gradually come closer. During high flow, the narrow neck may be cut through, and deposition closes the former channel. The abandoned loop remains as an oxbow lake. Option A is wrong because a river does not directly become a sea. Option B is wrong because a glacier is not the agent here. Option C correctly describes erosion cutting the neck and deposition isolating the bend. Option D is wrong because a sand dune does not lift a lake. Memory cue: meander cut-off equals oxbow lake.

Related tags

Oxbow LakeMeanderRiver Process

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