Search results
Results from the WOW.Com Content Network
The Cordilleran ice sheet covered up to 1,500,000 square kilometres (580,000 sq mi) at the Last Glacial Maximum. [11] The eastern edge abutted the Laurentide ice sheet. The sheet was anchored in the Coast Mountains of British Columbia and Alberta, south into the Cascade Range of Washington. That is one and a half times the water held in the ...
The event may have been caused by a large meltwater pulse, [10] which probably resulted from the final collapse of the Laurentide Ice Sheet of northeastern North America, [11] [12] [13] most likely when the glacial lakes Ojibway and Agassiz suddenly drained into the North Atlantic Ocean. [14]
In addition, the atypically linear string of glacial erratics that comprise the Foothills Erratics Train was created by the parallel, non-turbulent flowage of two very large ice masses—the Cordilleran Ice Sheet to the west, and the Laurentide Ice Sheet to the east—that occurred at the boundary between them.
The Laurentide Ice Sheet covered much of Canada and the northern United States from 95,000 and 20,000 years before present. The last advancement of glacial ice sheets in the eastern United States was the Wisconsin Glacial Episode, which caused the ice sheet to advance, and ended 10,000 years ago.
The gradual accumulation of ice on the Laurentide Ice Sheet led to a gradual increase in its mass, as the "binge phase". Once the sheet reached a critical mass, the soft, unconsolidated sub-glacial sediment formed a "slippery lubricant" over which the ice sheet slid, in the "purge phase", lasting around 750 years.
Table III Laurentide Ice Sheet; Glacial lobes and sublobes of the southern Laurentide Ice Sheet during the late Wisconsin Glaciation. [6] Major Lobes Minor Lobes Des Moines Grantsburg St. Louis Rainey Lake Superior [7] Wadena Chippewa [7] Wisconsin Valley [7] Langlade [7] Green Bay [7] Lake Michigan [7] Delavan Harvard-Princeton Peoria Decatur
During deglaciation since the Last Glacial Maximum, between about 20,000 to 7,000 years ago (20–7 ka), the sea level rose by a total of about 100 m (328 ft), at times at extremely high rates, due to the rapid melting of the British-Irish Sea, Fennoscandian, Laurentide, Barents-Kara, Patagonian, Innuitian and parts of the Antarctic ice sheets ...
The Laurentide Ice Sheet had a major effect on the climate. It was an ice sheet covering much of Canada, and parts of the northern United States in the Midwest and east. The Rocky Mountains separated the Laurentide Ice Sheet from the Cordilleran Ice Sheet. The Laurentide Ice Sheet had a cooling effect on the middle latitudes. [3]