A long sinuous ridge of sediment deposited in an alpine glacier's meltwater tunnel is referred to as a/an:

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Quizplus · Accepted Answer

An esker is a long, winding ridge of sediment that formed in a meltwater tunnel beneath a glacier. It is typically sinuous in shape and can extend for many kilometers. Eskers are formed by the deposition of sediment carried by the meltwater, and they often mark the former location of the glacier. Choices A, B, C, and D refer to different glacial landforms, but they do not accurately describe an esker.

A Long Sinuous Ridge of Sediment Deposited in an Alpine