Esker vs. Drumlin: What's the Difference?

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.

An elongated hill or ridge of glacial drift.

A long, narrow, sinuous ridge created by deposits from a stream running beneath a glacier.

(geography) An elongated hill or ridge of glacial drift.

(geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets

A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial motion.

A mound of glacial drift