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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.
[68] [69] [70] At its peak, the Laurentide Ice Sheet reached 3.2 km in height around Keewatin Dome and about 1.7-2.1 km along the Plains divide. [71] In addition to the large Cordilleran Ice Sheet in Canada and Montana, alpine glaciers advanced and (in some locations) ice caps covered much of the Rocky and Sierra Nevada Mountains further south ...
A chronology of climatic events of importance for the Last Glacial Period, about the last 120,000 years The Last Glacial Period caused a much lower global sea level.. The Last Glacial Period (LGP), also known as the Last glacial cycle, occurred from the end of the Last Interglacial to the beginning of the Holocene, c. 115,000 – c. 11,700 years ago, and thus corresponds to most of the ...
Canada covers 9,984,670 km 2 (3,855,100 sq mi) and a panoply of various geoclimatic regions, of which there are seven main regions. [9] Canada also encompasses vast maritime terrain, with the world's longest coastline of 243,042 kilometres (151,019 mi). [20] The physical geography of Canada is widely varied.
A series of ice advances and retreats between 10,500 and 9,500 YBP blocked the Lake Nipigon outlet and the other low level outlets, creating intermittent catastrophic outbursts of water into the Lake Minong basin. [1] These large inflows of water raised Lake Minong lake levels and flowed into Lake Algonquin in the Lake Michigan and Huron basins ...
Unlike the Laurentide Ice Sheet, which may have taken as many as eleven thousand years to fully melt, [3] the Cordilleran ice sheet melted very quickly, probably in four thousand years or less. [4] This rapid melting caused floods such as the overflow of Lake Missoula and shaped the topography of the fertile Inland Empire of Eastern Washington. [5]
Athabasca Glacier, Jasper National Park, Alberta.. A comprehensive list of glaciers in Canada began with glacial surveys by the Water Survey of Canada (WSC) from 1945 to 1980, [1] including an inventory begun for the International Geophysical Year (1957–58) and contributions to the World Glacier Inventory (WGI, now part of the World Glacier Monitoring Service) for the International ...
The lake was essentially an enlargement of the present Lake Ontario that formed because the St. Lawrence River downstream from the lake was blocked by the ice sheet near the present Thousand Islands. The level of the lake was approximately 30 m (~100 ft) above the present level of Lake Ontario. [3]