the physiographic region called the canadian shield:
 In total, the exposed area of the Shield covers approximately 8,000,000 km2 (3,100,000 sq mi). The southern part is characterized by semi-arid prairie, the central part is tree covered and the northern part is covered by the tundra. The resulting surface consists of rocky, ice-smoothed hills with an average relief of 30 metres (100 feet), together with irregular basins, which are mostly filled by lakes or swamps. In western Newfoundland and northeastern New Brunswick summits stand at 600–800 m; elsewhere in the region, this highland belt is flanked by uplands at 300–600 m in Québec, northwestern New Brunswick, southern and eastern Newfoundland, and southern Nova Scotia. The kimberlite pipes in which the diamonds are found are closely associated with cratons, which provide the deep lithospheric mantle required to stabilize diamond as a mineral. To the west of the Saskatchewan Plain lies the Missouri Coteau, a gradual slope upwards to the Rocky Mountains representing a thickening of non-marine sediments of the Cretaceous age. Sea level continues to rise at up to 30 cm per 100 years. The regional geography of Canada. Figure 22: Qu' Appelle Valley, Saskatchewan. However, extensive areas of Subarctic Lands must also be recognized.
What does mbs adj on a bank statement mean? Figure 17: Hall Beach on the Melville Peninsula, Nunavut. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. , The Canadian Shield is one of the world's richest areas in terms of mineral ores.
Reproduced with the permission of the Minister of Public Works and Government Services. Copyright © 2020 Multiply Media, LLC. During the 12,000 years of postglacial time, rivers have formed terraces, alluvial fans, floodplains and deltas (see River Landform). This latter feature is described as a horn and owes its origin to erosive action on all sides of the peak.
The river will eventually erode through the âgoose-neckâ and take the shorter, more direct route down the valley. Reproduced with the permission of the Minister of Public Works and Government Services Canada, 2005 and courtesy of Natural Resources Canada, Geological Survey of Canada.
Which of the following is true of the country of Guyana? Eventually, the ends of the âcutoffâ meander will fill with sediment, sealing the channel and forming an oxbow lake along the valley bottom. The Appalachian Uplands extends from southern Quebec and GaspÃ©sie to encompass New Brunswick, Nova Scotia, Prince Edward Island and the island of Newfoundland. The Shield is covered in parts by vast boreal forests in the south that support natural ecosystems as well as a major logging industry.
The inland edge of the lowland (about 180 m high) coincides approximately with the highest level of marine inundation which followed the disappearance of glacial ice from Hudson Bay about 7,500 years ago. These features along the coast are about 40 metres in height and protrude above a flat landscape lying between low uplands and the sea. Figure 5: Baffin Island, Nunavut. Canada may be divided into seven physiographic regions: Arctic Lands, Cordillera, Interior Plains, Hudson Bay Lowland, Canadian Shield Forest Lands, St Lawrence Lowlands and Appalachia. Figure 16: Peninsula on Baffin Island, Nunavut. Bedrock relief plays a role in large-scale physiographic features, but small-scale features are largely the result of Quaternary glaciation (2.6 million to 10,000 years ago).
The surface of the Shield is mainly the result of glaciation and a great proportion of it is covered by water in the form of lakes, ponds and swamps.
A. The Canadian Shield is among the oldest on earth, with regions dating from 2.5 to 4.2 billion years. Acton, D.,, & Ryder, J.,, & French, H.,, & Slaymaker, O.,, & Brookes, I., Physiographic Regions (2015). Reproduced with the permission of the Minister of Public Works and Government Services Canada, 2005 and courtesy of Natural Resources Canada, Geological Survey of Canada. There are three distinct mountain systems within the Cordillera. This valley was carved into glacial sediments by meltwaters flowing from Alberta and Saskatchewan into glacial Lake Agassiz in southeastern Manitoba about 10 000 to 12 000 years ago. The physiographic region called the Canadian Shield? During the Pleistocene Epoch, continental ice sheets depressed the land surface (creating Hudson Bay) but also tilted up its northeastern "rim" (the Torngat), scooped out thousands of lake basins, and carried away much of the region's soil.
The region, as a whole, is composed of ancient crystalline rocks whose complex structure attests to a long history of uplift and depression, mountain building (orogeny), and erosion. Several significant effects of climate are visible in the natural landscape. Volcanic activity has occurred sporadically at scattered locations in the Western and Interior systems up to the present. Glacial erosion had little effect, except along the eastern rim.
Coordinates: 52°00′N 71°00′W / 52.000°N 71.000°W / 52.000; -71.000, Geographic and geologic area of North America. Source: Geological Survey of Canada, photograph number 2002-272. Many of Canada's major ore deposits are associated with Precambrian volcanoes.
Which of the following states contains territory located in the Intermontane Basin and Plateau physiographic province? The West Lowland is broken into two parts by the Niagara, The Central Lowland includes the area between the Ottawa and St. Lawrence rivers, straddling the St. Lawrence as far as the city of QuÃ©bec and extending a short distance beyond the city on the north shore only. The deep river gorges were cut into it as it was lifted to its present level following the retreat of the ice sheet. South of the Athabasca River, the Alberta Plain stretches southeastward to the CanadaâUnited States boundary. The largest river in Canada, the Mackenzie, flows north from Great Slave Lake and empties into the Beaufort Sea. The Midwestern Canadian Shield forests that run westwards from Northwestern Ontario have boreal forests that give way to taiga in the most northerly parts of Manitoba and Saskatchewan.
It is the "Canadian Shield" in both counts, 5 billion yr old. Ecologists refer to the barren, treeless Arctic as tundra.
Source: Geological Survey of Canada, photograph number 2001-278. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Announcing our NEW encyclopedia for Kids! The James Region encompasses several subregions consisting of hills (Port Arthur, Penokean, Mistassini, Labrador and Povungnituk), plateaus (Saglouc, Larch, Caniapiscau and Lake), uplands (Abitibi and Severn), plains (Nipigon and Cobalt) and lowlands (Eastmain). This photograph was taken at the mouth of the Attawapiskat River on the James Bay coast in Ontario. The North American craton is the bedrock forming the heart of the North American continent and the Canadian Shield is the largest exposed part of the craton's bedrock. The land is rarely more than 150 metres above sea level, except for the Monteregian Hills, which consist of intrusive. Reproduced with the permission of the Minister of Public Works and Government Services Canada, 2005 and courtesy of Natural Resources Canada, Geological Survey of Canada.
It is mostly composed of igneous rock. Physiography originally meant "the study of natural phenomena," but later usage limited its application to physical geography in particular and, more recently, to landforms alone.
Reproduced with the permission of the Minister of Public Works and Government Services Canada, 2005 and courtesy of Natural Resources Canada, Geological Survey of Canada.
Reproduced with the permission of the Minister of Public Works and Government Services Canada, 2005 and courtesy of Natural Resources Canada, Geological Survey of Canada. Finally, the East Lowland includes Anticosti Island, Ãles de Mingan, and several small areas bordering the Gulf of St. Lawrence and the Strait of Belle Isle, as well as the Newfoundland Coastal Lowland.
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