- Group(s): Glaciers - Key Terms
Roches moutonnées are asymmetrical rocky outcrops in the trough floor. The up-valley side (stoss) gently slopes and is smoothed by abrasion of the glacier. The down-valley side (lee) is steep in gradient, and subject to plucking as ice accelerates past it. They represent significantly more resistant rock on the glacial trough floor that the glacier found more difficult to erode than surrounding rocks.