Esker

{
  "id": "MLC-T-ENV-010069",
  "term": "Esker",
  "field": "Environment",
  "definition": "A long, narrow, sinuous, steep-sided ridge composed of irregularly stratified sand and gravel that was deposited as the bed of a stream flowing in a subglacial ice tunnel (within or below the ice) or between ice walls on top of the ice of a wasting glacier. Eskers remain behind as high ground when the glacier melts. Eskers range in length from less than a kilometer to more than 160 kilometers, and the height range is 3 - 30 meters.",
  "references": [
    "Federal Geographic Data Committee Coastal and Marine Ecological Classification Standard, June 2012 FGDC-STD-018-2012"
  ],
  "url": "https://mlchart.com/terminology/environment/esker/"
}