In the glaciated areas landforms such as cirques i. Closer to the coast, where the marine mantle is thicker, there are typically vast level plains of muskeg with thick peat accumulations and innumerable ponds.
Cordillera This region is part of the mountain system that extends the length of the western third of North and South America. These plains contrast with terrain in a wide zone 50—80 km inland of the coast.
Physical features of the region include mountains, highlands, plains, and lowlands. The first step is the Manitoba Plain in the southeast, which lies below the Manitoba Escarpment at elevations under m.
Some of these include manufacturing, construction, power generation, mining, agriculture, forestry, and fishing. The Cypress Hills of southwestern Saskatchewan and southeastern Alberta rise to an elevation of 4, feet 1, metresthe highest point in mainland Canada between the Rocky Mountains Canadian Rockies and Labrador.
Taken together, Canada's Arctic and Subarctic Lands comprise nearly 40—45 per cent of Canada's land surface. Examples are the Labrador and Port Arthur hills. In the south, permafrost exists beneath only the highest, windswept ridge crests, but northward, the permafrost limit becomes lower and, in the central and northern Yukonthere is permafrost at all elevations.
By contrast, areas of unconsolidated sediments from the Paleocene to Quaternary periods 65 million to 10, years ago form more undulating, poorly drained lowland terrain. The seven Monteregian Hills e. Higher elevations consist of bedrock outcrops, while upland surfaces and upper valley-side slopes are covered by angular rock-rubble accumulations.