esker

esker (ES-ker) - n., a long, narrow, winding ridge of gravel and sand deposited by a meltwater stream running under a glacier.


These are strikingly uniform in width along their length, and can wind about for several miles. Always found in glacial valleys. The name was adopted in 1852 from Irish eiscir, ridge of gravel, from Old Irish escir, ridge.


Thanks, WikiMedia!

---L.