noun
- a long ridge of sediment deposited by a stream flowing beneath a glacier
Usage: geology
Examples
- The esker stretched for miles across the landscape.
- Geologists studied the esker to understand glacial movement patterns.
- The hiking trail followed the crest of an ancient esker.
- Sand and gravel from the esker were used for construction.
- The esker provided evidence of where the glacier once flowed.
- Many eskers in Maine were formed during the last ice age.