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Geography

Which mechanism forms a moraine-dammed lake during deglaciation?

A)Isostatic rebound exceeding sediment deposition
B)Glacial till obstructs meltwater drainage
C)Erosion exceeding the basal channel elevation
D)Accelerated weathering of surrounding bedrock

💡 Explanation

Glacial retreat causes meltwater to accumulate behind a moraine through deposition, therefore creating a lake because the moraine impedes drainage, rather than rebound which affects regional land elevation.

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