A(n) ____ is a long sinuous ridge of water-deposited cross-bedded and well-sorted sediment deposited by a stream that flowed within or under a glacier.

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A long sinuous ridge of water-deposited sediment is known as an esker. It is formed by streams that flow within or underneath glaciers and deposit cross-bedded and well-sorted sediment. Tarns are small mountain lakes that form in cirques, moraines are deposits of sediment left by glaciers, drumlins are teardrop-shaped hills formed by glacial action, and varves are layers of sediment deposited in a lake or river that can be used to study past climate changes.

A(n) ____ Is a Long Sinuous Ridge of Water-Deposited Cross-Bedded