ESKER
- a narrow ridge of gravel and sand [n ESKERS]
- a narrow ridge of gravel and sand, also ESCAR, ESKAR [n -S]
- serpentine ridge of gravelly and sandy drift, believed to have been formed by streams under or in glacial ice
- a long narrow ridge or mound of sand, gravel, and boulders deposited by a stream flowing on, within, or beneath a stagnant glacier
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