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Geography

Which sediment transport mechanism dominates the formation of a rock glacier initiating from a cirque?

A)Solifluction enhanced by permafrost creep
B)Fluvial erosion along meltwater channels
C)Aeolian deposition of fine-grained sediments
D)Glacial plucking by a receding ice mass

💡 Explanation

When a cirque transitions to a rock glacier, solifluction, aided by permafrost creep, becomes dominant because freeze-thaw cycles saturate sediments with water, causing slow downslope movement over ice. Therefore enhanced solifluction results, rather than fluvial or aeolian processes, or glacial plucking which involves different drivers.

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