This decreases erosion in the center of the trough. Along the side walls of the trough, the ice is thinner causing cooler basal temperatures. Any basal water is easily drained off, or frozen to the bed. All erosion process can operated readily along hte sides. Following is a short list of his classification of landscapes.
Areas usually show plucking and quarrying as main ersoive style.
Lots of kettle lakes. The large u-shaped troughs cut into realtively flat, low relief areas. Considered the result of concentrated areas of abrasion, quarrying and plucking and thicker ice. Topographic lows in the area. Areas where little erosion is present although the area was once covered by ice.