Which feature characterizes glacial cirques formed in locations with significant permafrost?

💡 Explanation

When cirques form in permafrost regions, increased freeze-thaw weathering acts because water expands upon freezing, exerting pressure on the rock and causing it to fracture/disintegrate efficiently, leading to intense headwall erosion. Therefore increased weathering of the headwall within the cirque results, rather than shallower basins, reduced erosion, or reduced rock glaciers which are affected by entirely different parameters.

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