Retreat of the last ice-sheet in eastern Canada
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Retreat of the last ice-sheet in eastern Canada by Ernst Antevs

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Published by F.A. Acland, printer in Ottawa .
Written in English



  • Canada.


  • Geology -- Canada.,
  • Glacial epoch.

Book details:

Edition Notes

Statementby Ernst Antevs.
SeriesCanada. Geological Survey. Memoir 146. (Geological ser., no. 126), Memoir (Geological Survey of Canada) ;, 146
LC ClassificationsQE185 .A2 146
The Physical Object
Pagination1 p. l., iii, 142 p.
Number of Pages142
ID Numbers
Open LibraryOL252634M
LC Control Numbergs 25000388

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The largest of these ice sheets was the Laurentide Ice Sheet (Figure 1), covering much of Canada and the northern United States with a mass of ice that was nearly 4 km thick in some places. After 20, years ago, Earth started to warm, and the Laurentide Ice Sheet began to disappear. The retreat of the Laurentide Ice Sheet in Canada led to the formation of moraines and up to 26 proglacial lakes scattered throughout central Canada. The deglaciation occurred from the last glacial maximum (21, years ago) until about years ago. Some of the lakes the southern Ungava Bay area were fully deglaciated c. 6, years ago. All data are held within a Geographic Information System (GIS), and are then deciphered to produce a best-estimate of the combined pattern and timing of retreat of the ice sheet. The data, method and results are presented and it is emphasised that this is almost certainly not the complete picture, but provides a framework of what is by: The advance and retreat of ice sheets has been occurring for millennia. Ice sheets grow when snow accumulates faster than it melts. As the snowfall accumulates, its weight presses down on earlier snows and compacts this into glacial ice.

D.M. Mickelson, C. Winguth, in Reference Module in Earth Systems and Environmental Sciences, Ice Sheets During the Last Glaciation. The vast Laurentide Ice Sheet in North America had several ice domes and divides and was at times partly confluent with the smaller Cordilleran Ice Sheet and with the Innuitian and Greenland Ice Sheets at the Last Glacial Maximum (LGM; between 19 and 23 cal. The Laurentide Ice Sheet was almost 3 kilometers (2 miles) thick and covered North America from the Canadian Arctic all the way to the modern U.S. state of Missouri. Glacial retreat of the Laurentide Ice Sheet created such features as the Great Lakes. The glaciers on Baffin Island, Canada, are remnants of the Lauentide Ice Sheet. Pattern and timing of retreat of the last British-Irish Ice Sheet. Chris D. Clark,1 Anna L.C. Hughes,2 Sarah L. Greenwood,3 Colm Jordan,4 and Hans Petter Sejrup.5 1Department of Geography, University of Sheffield, Sheffield, S10 2TN, UK. 2School of the Environment & . Mar 17,  · At the peak of the last ice age, a vast ice sheet covered northern Europe, spanning from the British Isles, across Scandinavia and into Russia in .

Dec 26,  · December 27, New evidence suggests that the West Antarctic Ice Sheet is retreating more slowly and contributing less to rising global sea levels than scientists once fact, said researchers at a recent meeting, the sheet was still growing as recently as 8, years ago -- thousands of years after the most recent Ice Age. The last deglaciation of the Laurentide Ice Sheet (LIS) was associated with major reorganisations in the ocean-climate system and its retreat also represents a valuable analogue for understanding. Retreat pattern of the Cordilleran Ice Sheet in central British Columbia at the end of the last glaciation reconstructed from glacial meltwater landforms. Our results demonstrate a rapid retreat of a marine ice sheet sector driven by grounding line retreat of the major ice stream, likely to be pivotal in furthering our understanding of such processes, their tipping points and rates of change, and their interactions with ocean by: