ESKER

Dundee, Fond du Lac County. September, 1957. Altitude c. 1,000 ft. A small esker, perhaps only about 1,500 feet long, is seen as an S-shaped ridge at the center of this low oblique photograph. This landform was deposited as sand and gravel on the bed of a subglacial stream during a period of ice stagnation. Another esker is seen just across the highway at upper center.