Which erosional pattern develops when a retreating glacier carves a U-shaped valley subsequently flooded by the sea?

💡 Explanation

When a glacier retreats, glacial erosion leaves behind a U-shaped valley carved by immense ice pressure and abrasion because glacial ice fills and scours the valley floor. Therefore a subsquent rise in sea-level creates a fjord, rather than other geomorphological formations that arise from different processes.

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