esker

es·ker (es′kər)

noun

a winding, narrow ridge of sand or gravel, probably deposited by a stream flowing in or under glacial ice

Etymology: Ir eiscir, a ridge

Modifies a noun

ridge: Two esker ridge fragments are located to the south of the main ridge.

Noun used with modifier

case: In some cases eskers were draped across the ridges during final deglaciation.

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