Eskers are long, narrow ridges of sand and gravel that form from sediment deposition within ice-walled tunnels by streams that flowed within and under glaciers. They are a distinctive feature of areas that were covered by glaciers during the last ice age.

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Eskers Are _____.

Question 28

Multiple Choice

Eskers are _____.

A) large boulders of nonlocal rock
B) composed of lake sediments
C) crescent-shaped with arms pointing in the up-ice direction
D) long and narrow ridges composed of sand and gravel
E) conical hills of sorted glaciofluvial deposits

Correct Answer: