Which process determines shape when freeze-thaw weakens bedrock walls above a glacial cirque?

💡 Explanation

When freeze-thaw cycles weaken bedrock above cirques, frost action mechanically dislodges rock because water expands upon freezing, exerting pressure. This leads to talus slope formation around the cirque margins. Thus talus slope formation occurs, rather than faster ice flow, esker or kettle lake development, which are created by different glacial processes and deposits.

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