The geography of Saskatchewan is unique among the provinces and territories of Canada in some respects. It is one of only two landlocked regions (Alberta is the other) and it is the only region whose borders are not based on natural features like lakes, rivers, or drainage divides. The borders of Saskatchewan, which make it very nearly a trapezoid, were determined in 1905 when it became a Canadian province. Saskatchewan has a total area of of which is land and is water.
The province's name comes from the Saskatchewan River, whose Cree name is: kisiskatchewani sipi, meaning "swift flowing river".
Saskatchewan can be divided into three regions: grassland (part of the Great Plains) in the south, aspen parkland in the centre, and forest in the north. The forest region lies partly on the northern part of the Great Plains and partly on the Canadian Shield. Its principal rivers are the Assiniboine River, and North and South Saskatchewan Rivers.
Saskatchewan is bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, and on the south by the U.S. states of Montana and North Dakota.
Physical geography
Saskatchewan is very close to a trapezoid. Its western border runs concurrent with the 4th meridian or the 110°W longitude, separating Saskatchewan from the province of Alberta. This border extends in length for and was established in 1905 when both provinces were formed.
Saskatchewan's eastern border includes minor measurement errors from the 1880s, so that it does not lie perfectly on the 102°W longitude, but rather it is slightly west of that meridian from 60°N parallel to 55°47'N, then slightly east of that until the Canada–United States border – an irregular line (rather than a straight one) for its distance. When Saskatchewan was formed in 1905, Manitoba and the District of Keewatin were the neighbouring areas to the east. Manitoba was enlarged in 1912 north to the 60th parallel, becoming Saskatchewan's only eastern neighbour. This remaining section of the border was determined by survey between 1961 and 1972.
Saskatchewan's southern border with the United States sits approximately on the 49th parallel, as agreed in the Treaty of 1818—though minor measurement errors during the 1870s International Boundary Survey result in some variance between the actual Canada–United States border and the 49th parallel. This boundary was not formally established until the 1867 survey. This border extends across southern Saskatchewan.
The Northwest Territories is north of the 60th parallel which forms the northern border of the province. This border extends across northern Saskatchewan. The aforementioned measurement errors in the 1880s surveys place the Saskatchewan / Manitoba border approximately west of the 102nd meridian and the accurately measured Northwest Territories / Nunavut border, just missing a true quadripoint of the Saskatchewan / Manitoba/Northwest Territories / Nunavut borders.
Geology
The geology of Saskatchewan can be divided into two main geological regions, the Pre-Cambrian or Canadian shield and the Phanerozoic or Western Canada Sedimentary Basin. Within the Canadian shield exists the Athabasca sedimentary basin. Meteorite impacts have altered the natural geological formation processes. The Quaternary period is the most recent geological process when the prairies were affected by glacial events. There are six notable meteorite or comet impact craters in Saskatchewan. Carswell, Deep Bay and Gow Lake have affected the Canadian Shield area of the north. In the southern Phanerozoic crater are the Viewfield, Elbow and Maple Creek structures. The Carswell structure is the largest astrobleme at in diameter.
Historical geography
Archaeologists have dated the first human settlements to 9,500 BC. The four groups inhabiting the area at the time of the first European contact were the Cree, Assiniboine, Salteaux, and Dene. Henry Kelsey of the Hudson's Bay Company is considered the first European person to see this area. The earliest trading posts were made by the French; however, the first permanent settlement was established at Cumberland House in 1774 by the HBC. In addition, several more ports were set up by British fur traders among the area's waterways. The forested area of the Canadian Shield was the favoured area for early settlement, and the economy was heavily dependent on hunting and trapping.