0 a long, narrow, raised line of earth, small stones, and sand left on the earth's surface where melted ice once flowed under a glacier
From here the hunters could take caribou when they forded the wetlands between eskers.
These steep hills are known in geology as a kame or esker.
An esker was created when the glacier retreated due to climate warming.
The porous ground beneath the canal could not withstand the force of the water, which started to quickly erode deep into the esker.
At area is swamps, beaches and forest in esker.
An esker deposit with 50 ft (15 m) relief that extends for nearly half a mile (1 km) is the most striking geological feature.
Tunnel valley courses may be periodically interrupted; the interruption may include a stretch of elevated esker, indicating the channel ran through ice for a distance.
The shoal beach was created by erosion since the lake level was reduced when the esker washed out in 1918.
