Which process reduces the effectiveness of cirque glacial erosion in slowly deforming mountains with heterogeneous bedrock composition?

💡 Explanation

When bedrock comprises varying rock types with differing hardness and weathering resistance, differential erosion rates arise because the weaker materials erode more readily, deflecting glacial flow and undermining optimal cirque formation. Therefore varied bedrock becomes a stronger limitation rather than uniform rates, rebound, or alteration, which would be uniform.

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