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The Athabasca Sand Dunes are estimated to be approximately 8,000 years old, formed near the end of the last glacial period. [2] As glaciers receded, meltwater washed enormous quantities of sand, silt and sediment from local sandstone into Lake Athabasca, whose water level was at the time much higher than currently.
The Athabasca basin, a historical fluvial siliciclastic basin with sediments from the Hudsonian mountains with the occasional rare marine sequence. [16] [dead link ] The Athabasca basin was formed during the Statherian or Paleohelikian 1.7 to 1.6 billion years ago when coarse fluvial and marine clastic sediments were laid down containing gold, copper, lead, zinc, and uranium oxides.
The Canadian Shield is among the oldest geologic areas on Earth, with regions dating from 2.5 to 4.2 billion years. [8] The multitude of rivers and lakes in the region is classical example of a deranged drainage system, caused by the watersheds of the area being disturbed by glaciation and the effect of post-glacial rebound. [9]
Historically, in Canada the area was known as the Palliser's Triangle and regarded as an extension of the Great American Desert and unsuitable for agriculture and thus designated by Canadian geographer and explorer John Palliser. The terrain of the Missouri Coteau features low hummocky, undulating, rolling hills, potholes, and grasslands. [4]
The provinces and territories are sometimes grouped into regions, listed here from west to east by province, followed by the three territories.Seats in the Senate are equally divided among four regions: the West, Ontario, Quebec, and the Maritimes, with special status for Newfoundland and Labrador as well as for the three territories of Northern Canada ('the North').
The Okanagan Desert is the common name for a semi-arid shrubland located in the southern region of the Okanagan Valley in British Columbia and Washington. It is centred around the city of Osoyoos and is the only semi-arid shrubland in Canada. [1] [2] Part of this ecosystem is referred to as the Nk'mip Desert by the Osoyoos Indian Band.
The epigastric region is the upper central square and contains the bottom edge of the liver as well as the upper areas of the stomach. The diaphragm curves like an upside down U over these three regions. The central right region is called the right lumbar region and contains the ascending colon and the right edge of the small intestines.
Mount Logan (/ ˈ l oʊ ɡ ən / LOH-ghən) is the highest mountain in Canada and the second-highest peak in North America after Denali.The mountain was named after Sir William Edmond Logan, a Canadian geologist and founder of the Geological Survey of Canada (GSC).