Which geomorphic phenomenon results from freeze-thaw weathering within a cirque basin over extended periods?

💡 Explanation

When repeated freeze-thaw cycles act on the bedrock of a cirque, physical weathering breaks the rock into smaller pieces because water expands upon freezing exerting pressure. This process excavates and deepens the cirque floor; therefore cirque deepening results, rather than patterned ground, roche moutonnée, or permafrost stabilization that require different geologic settings.

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