Which process predominantly shapes cirque dimensions in regions characterised by intense freeze-thaw cycles?

💡 Explanation

When meltwater fills ice-rock interfaces, freeze-thaw cycles cause nivation weathering and cryoturbation because ice expands creating pressure within the rocks to mechanically break down, primarily shaping cirque dimensions. Therefore, nivation weathering and cryoturbation shape dimensions, rather than plucking abrasion, folding faulting or eolian action which require different conditions and mechanisms.

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