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Many of Canada's major ore deposits are associated with greenstone belts. [ 15 ] The Sturgeon Lake Caldera in Kenora District , Ontario, is one of the world's best preserved mineralized Neoarchean caldera complexes, which is 2.7 Ga. [ 16 ] The Canadian Shield also contains the Mackenzie dike swarm , which is the largest dike swarm known on ...
During the Last Glacial Maximum, much of the world was cold, dry, and inhospitable, with frequent storms and a dust-laden atmosphere. The dustiness of the atmosphere is a prominent feature in ice cores; dust levels were as much as 20 to 25 times greater than they are in the present.
Glaciers of Tibet — the glaciers of the Himalayas located within Tibet. Pages in category "Glaciers of Tibet" The following 5 pages are in this category, out of 5 ...
The Laurentide ice sheet (LIS) was a massive sheet of ice that covered millions of square miles, including most of Canada and a large portion of the Northern United States, multiple times during the Quaternary glaciation epochs, from 2.58 million years ago to the present. [2]
Between 1960 and 2004 the glaciers in the region have shrunk in volume by 389 cubic kilometres (93 cu mi), or 7%, and in area by 3,248 square kilometres (1,254 sq mi), or 5.5%. The rate of shrinkage is expected to accelerate, with 2/3 of China's glaciers gone by 2060.
The geography of Tibet consists of the high mountains, lakes and rivers lying between Central, East and South Asia. Traditionally, Western (European and American) sources have regarded Tibet as being in Central Asia , though today's maps show a trend toward considering all of modern China, including Tibet, to be part of East Asia .
[38] [39] [40] Due to its great extent, this glaciation in the subtropics was an important element of radiative forcing. With a much lower latitude, the ice in Tibet reflected at least four times more radiation energy per unit area into space than ice at higher latitudes. Thus, while the modern plateau heats the overlying atmosphere, during the ...
Canada has over 2,000,000 lakes—563 greater than 100 km 2 (39 sq mi)—which is more than any other country, containing much of the world's fresh water. [14] [15] There are also freshwater glaciers in the Canadian Rockies, the Coast Mountains and the Arctic Cordillera. [16]
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