description Androscoggin River Esker Overview
The Androscoggin River Esker is a glaciofluvial ridge located in the Maine river basin of the same name. It was formed as a remnant of subglacial drainage channels that existed beneath the Laurentide Ice Sheet during the last ice age. Composed primarily of stratified sand and gravel deposited by meltwater streams, the ridge reflects the geological history of the region. Such landforms are studied by geologists and Quaternary scientists to understand glacial retreat patterns in North America.
help Androscoggin River Esker FAQ
What is an esker?
An esker is a long, narrow ridge of sand and gravel deposited by meltwater flowing through or beneath a glacier. The Androscoggin River Esker formed from drainage beneath the Laurentide Ice Sheet during the last ice age.
Where is the Androscoggin River Esker?
It is located in the Androscoggin River basin in Maine. Its name connects the glacial landform with the river system that drains much of western and central Maine.
How did the Androscoggin River Esker form?
Meltwater moved through a subglacial channel under the Laurentide Ice Sheet and carried sand and gravel. When the ice melted away, the sediment-filled channel remained as a raised ridge.
What is the esker made of?
The ridge is made primarily of stratified sand and gravel, which are typical deposits of fast-moving glacial meltwater. Those loose materials can make eskers useful sources of groundwater but also vulnerable to excavation and erosion.
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