One of the mysteries of the English language finally explained.
A long ridge of gravel and other sediment, typically having a winding course, deposited by meltwater from a retreating glacier or ice sheet.
- ‘Wetlands may overlie important groundwater aquifers, especially on moraines, eskers, and fluvioglacial deposits.’
- ‘The long sand and gravel bodies called eskers were formed in subglacial cave-like tunnels where sand and gravel were deposited by flowing water.’
- ‘Late this afternoon, I followed a dry esker, dropped down the ridge and walked right beside a bear den.’
- ‘A large interior plateau contains dense forests, thousands of lakes and peat bogs, and rocky infertile soils associated with a glacially modified landscape with numerous drumlins and eskers.’
- ‘The new quarry will destroy the undesignated, unforested eskers and also the burial cairns.’
Mid 19th century: from Irish eiscir.
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