Which process leads to the formation of a tarn lake after glacial retreat within a cirque?

💡 Explanation

When a glacier retreats from a cirque, melting buried ice and retained meltwater accumulates in the depression because the bedrock basin has been scoured and deepened by glacial erosion, forming a tarn lake. Therefore melting of buried ice and meltwater result, rather than isostatic rebound, cryostatic pressure, or loess deposition, which involve different geological processes.

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