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From a tunnel in the retreating glacier comes a long, sinuous ridge of stratified gravel laid by the water of an under-ice stream. This feature is called a(n) ________. esker terminal moraine kettle outwash plain drumlin

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Answer: An Esker

Step-by-step explanation:

An esker( derived from the irish word , eiscir means elevation) is a long, low ridge of sand and gravel strata occurring in glaciated regions and formed by deposition of sediments from glacial melt water.

Eskers appear the same and are usually found in Europe and North America regions occupying many kilometres like railway lines.A very common example of such Eskers is the Eiscir Riada, which runs 200km from Dublin to Galway.

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