1. a long ridge of gravel and sand deposited by a stream flowing in or under a glacier
Usage: geology; also spelled 'esker'

Examples

• The eskar stretched across the landscape, a remnant of the last ice age.
• Geologists studied the eskar to understand the ancient glacial meltwater patterns.
• The ridge formed by the eskar provided a natural pathway through the valley.
• Eskars are commonly found in regions that were once covered by glaciers.