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Eastmain (or East Main) refers to the east shore of Hudson Bay, although in the 1680s the term was restricted to the vicinity of the Eastmain River. The corresponding reference to the west shore of Hudson Bay is the Westmain (West Main).

A drainage basin is an area of land that contributes the water it receives as precipitation to a river or network of rivers.

The Cassiar District lies in British Columbia's northwest corner; it historically encompasses the Stikine and Dease River watersheds and that of the upper Taku, NASS and Kechika.

The vegetation is low arctic tundra in the N, dominated by dwarf shrubs and grasses, and woodland in the S, consisting of scattered, stunted spruce with a lichen carpet. The summer range and calving grounds of the large Bluenose caribou herd lie within this region.

Holland Marsh, 2900 ha of organic (muck) soil, is located near Bradford West Gwillimbury, Ont, 50 km north of Toronto.

The paucity of precipitation in deserts is due to one or a combination of causes.

Although the other limits are less well defined, the highlands may be considered to extend 100-200 km northward from the scarps and to stretch from the Gatineau River in the west (mean elevation 400 m) some 550 km to the SAGUENAY RIVER in the northeast.

Formed of ancient Precambrian rocks and heavily glaciated during the Quaternary (1.65 million to 10 000 years ago), the mountains support more than 70 small glaciers, the southernmost in eastern North America.

Old Crow Basin is an important geographic feature in the natural history and human history of Canada

Muskeg (from Cree maskek and Ojibwe mashkiig, meaning “grassy bog”) is a type of northern landscape characterized by a wet environment, vegetation and peat deposits. Chiefly used in North America, the term muskeg escapes precise scientific definition. It encompasses various types of wetlands found in the boreal zone, including bogs, fens, swamps and mires. In Canada, muskeg and other peatlands cover up to 1.2 million km², or 12 per cent of the country’s surface.

The dark grey lunar surface reflects only 7% of the sunlight it receives (comparable to the reflectivity of black soil). The moon is dominated by thousands of craters, ranging from microscopic pits to gigantic Clavius, diameter 230 km.

The Okanagan Valley is in south-central British Columbia, extending about 200 km north from the American border.

James Bay is the southern appendage of Hudson Bay. It is about 160 km wide between Pointe Louis-XIV on the east coast and Cape Henrietta Marie on the west.

Height of land, a region of high ground that may act as a watershed.

The Peace River Lowland is a gently rolling lowland without clearly defined outer boundaries, extending east of the Rocky Mountains on both sides of the Peace River, sloping downward to the north and east.

St. Lawrence Lowland is a plain along the St. Lawrence River between Québec City in the east and Brockville, Ontario, in the west, including the Ottawa River valley west to Renfrew, Ontario.

Foothills, a region of rolling, undulating or hilly terrain lying between an area of plains and a mountain range.

Thousand Islands (Ontario part), an 80 km long section of the St Lawrence River, extending downstream from Lake Ontario between Kingston and Brockville and containing over 1000 rocky, wooded islands which range from several square kilometres to barely emergent rocks and shoals.

In strictly geographic terms, the North refers to the immense hinterland of Canada that lies beyond the narrow strip of the country in which most Canadians live and work, but generally refers to the Northwest Territories, the Yukon and Nunavut.

A forest region is a major geographic belt or zone characterized by a broad uniformity both in physiography and in the composition of the dominant tree species. Canada can be divided into eight forest regions.