Evidences of multiple glaciation in South Nahanni National Park, Mackenzie Mountains, Northwest Territories

South Nahanni National Park transects the southern Mackenzie Mountains from a position close to the continental divide to their eastern limit. In the context of glaciation it displays three distinct zones: I, in the west, a cordilleran glacial zone with evidence of two or more phases of valley glaciation; II, in the east, a Laurentide glacial zone with evidence of invasion by three successive Laurentide ice sheets; III, a central unglaciated …