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long, narrow, winding ridge of stratified sand-and-gravel driftdrift,
deposit of mixed clay, gravel, sand, and boulders transported and laid down by glaciers. Stratified, or glaciofluvial, drift is carried by waters flowing from the melting ice of a glacier.
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. Eskers, many miles long and resembling abandoned railway embankments, occur in Scandinavia, Ireland, Scotland, and New England; they arose from deposition of sediment in the beds of streams flowing through or beneath glaciers.



a long, narrow ridge composed of horizontally or, more often, obliquely stratified sand, gravel, and pebbles and of boulders. Eskers are usually not longer than 40 km but occasionally exceed 500 km. Their width varies between several meters and 2 to 3 km, and their height can reach several dozen meters. Eskers are deposits left by meltwater flowing through valleys and tunnels that have been cut through a glacier. They are found in areas of Quaternary, or Anthropogenic, continental glaciation in Sweden, Finland, and the northern European part of the USSR.



the general name for aggradation glaciofluvial land-forms that formed within glaciers, such as oses, kames, and kame terraces. Some foreign scientists, such as R. Flint, use the term “esker” as a synonym for os.


A sinuous ridge of constructional form, consisting of stratified accumulations, glacial sand, and gravel. Also known as asar; eschar; eskar; osar; serpent kame.
References in periodicals archive ?
The kettle holes of glaciokarst origin--esker depressions--are typical North Estonian eskers.
Typical radial eskers of northern Estonia consist of coarse, unevenly sorted, and stratified predominantly carbonaceous (80% and more) glaciofluvial deposits (Photo 2).
Quite frequently springs open on the slope or foot line of eskers and karst landforms are common close to eskers.
Eskers are classified as positive landforms or systems of positive landforms, complicated by kettles and often accompanied with kames, terraces or valleys (Rahni 1984).
Already Flint (1928) pointed out the necessity to distinguish real eskers from other ridge-like formations.
But the eskers got their final shape only after the melting of stagnant ice and buried ice blocks.
Usually 6-8 rhythms of the alternation of coarse and finer glaciofluvial material can be observed in the North Estonian eskers.
The basal layers of North Estonian eskers usually consist of finer deposits than the upper portion.
Eskers as linear systems of landforms of glaciofluvial sedimentation require certain preconditions for genesis:
In view of the above, revision of the definition and classification of eskers is needed.
I am obliged to my long-term colleagues Endel Rahni, Anto Raukas, and Avo Miidel with whom I have studied Estonian eskers during many years and have had fruitful debates.
Scandinavian eskers, global climatic relationships, and solar forcing.