What is another word for Esker?
Pronunciation: [ˈɛskə] (IPA) 
An esker is a serpentine ridge of gravel, sand, and sediment deposited by a stream that once flowed beneath a melting glacier. Eskers are commonly found in areas previously covered by glacial ice. They can vary in size from a few meters to several kilometers long and up to 30 meters high. Eskers are also known by a variety of other names including os, kame, kame terrace, and drumlin. An os is an elevated ridge of sediment that was formed in a glacial stream. A kame is a small hill or mound of sand and sediment left behind by a melting glacier. A kame terrace is a flat area that was once the bed of a glacial stream. A drumlin is a long, low hill made of glacial till that is shaped like an inverted spoon.
