Esker vs. Drumlin

Esker and Drumlin Definitions
Esker
A long, narrow, steep-sided ridge of coarse sand and gravel deposited by a stream flowing in or under a melting sheet of glacial ice. Also called os3.
Drumlin
An elongated hill or ridge of glacial drift.
Esker
A long, narrow, sinuous ridge created by deposits from a stream running beneath a glacier.
Drumlin
(geography) An elongated hill or ridge of glacial drift.
Esker
(geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets
Drumlin
A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial motion.
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Drumlin
A mound of glacial drift