Introduction : The Laurentide Ice Sheet and its Significance
The Laurentide Ice Sheet is a glacier complex that covered large parts of eastern, central and northern North America during the last glaciation. The Ice Sheet depressed the crust by at least 300 m and it held enough water to lower sea level 40-50 m. The Laurentide Ice Sheet was first viewed as a co...
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Les Presses de l'Université de Montréal
1987
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fttriple:oai:gotriple.eu:10670/1.my4i95 2023-05-15T15:35:43+02:00 Introduction : The Laurentide Ice Sheet and its Significance Fulton, Robert J. Prest, Victor K. 1987-01-01 http://id.erudit.org/iderudit/032676ar en eng Les Presses de l'Université de Montréal Érudit 10670/1.my4i95 http://id.erudit.org/iderudit/032676ar other Géographie physique et Quaternaire geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 1987 fttriple 2023-01-22T16:42:01Z The Laurentide Ice Sheet is a glacier complex that covered large parts of eastern, central and northern North America during the last glaciation. The Ice Sheet depressed the crust by at least 300 m and it held enough water to lower sea level 40-50 m. The Laurentide Ice Sheet was first viewed as a complex of essentially independent glaciers; later it was considered a single sheet centred on Hudson Bay; and recently the Laurentide Ice Sheet has been shown to have been made up of at least 3 major coalescent ice masses. In addition to lowering sea level and depressing the land surface, it changed atmospheric circulation, caused southward movement of biozones, eroded the weathered mantle, and deposited extensive areas of freshly eroded materials. Understanding the history and dynamics of the Ice Sheet is important in prospecting for more deposits, predicting effects of acid rain, understanding the nature and distribution of soils, locating granular aggregate, predicting sea level change, modelling climatic change and predicting major changes in flow patterns of modern ice sheets. Au cours de la dernière glaciation, l'inlandsis laurentidien a recouvert de vastes étendues de l'est, du centre et du nord de l'Amérique du Nord. L'inlandsis a causé un affaissement d'au moins 300 m de l'écorce terrestre et a emmagasiné une telle quantité d'eau que le niveau marin s'est abaissé de 40-50 m. On a d'abord considéré l'inlandsis comme un complexe de glaciers fondamentalement indépendants; plus tard, on a cru qu'il s'agissait d'une seule nappe glaciaire centrée sur la baie d'Hudson; on a récemment démontré qu'il était formé d'au moins trois grandes masses coalescentes. L'inlandsis a également été la cause de modifications de la circulation atmosphérique et de la migration des biozones vers le sud; il a érodé les roches déjà altérées et recouvert de vastes étendues de dépôts fraîchement érodés. L'explication de l'évolution et de la dynamique de l'inlandsis a des répercussions sur la prospection des gîtes minéraux, la prévision ... Text Baie d'Hudson Hudson Bay Ice Sheet Unknown Baie d'Hudson ENVELOPE(-78.666,-78.666,58.417,58.417) Baie-d'Hudson ENVELOPE(-74.999,-74.999,58.500,58.500) Hudson Hudson Bay |
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English |
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geo envir |
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geo envir Fulton, Robert J. Prest, Victor K. Introduction : The Laurentide Ice Sheet and its Significance |
topic_facet |
geo envir |
description |
The Laurentide Ice Sheet is a glacier complex that covered large parts of eastern, central and northern North America during the last glaciation. The Ice Sheet depressed the crust by at least 300 m and it held enough water to lower sea level 40-50 m. The Laurentide Ice Sheet was first viewed as a complex of essentially independent glaciers; later it was considered a single sheet centred on Hudson Bay; and recently the Laurentide Ice Sheet has been shown to have been made up of at least 3 major coalescent ice masses. In addition to lowering sea level and depressing the land surface, it changed atmospheric circulation, caused southward movement of biozones, eroded the weathered mantle, and deposited extensive areas of freshly eroded materials. Understanding the history and dynamics of the Ice Sheet is important in prospecting for more deposits, predicting effects of acid rain, understanding the nature and distribution of soils, locating granular aggregate, predicting sea level change, modelling climatic change and predicting major changes in flow patterns of modern ice sheets. Au cours de la dernière glaciation, l'inlandsis laurentidien a recouvert de vastes étendues de l'est, du centre et du nord de l'Amérique du Nord. L'inlandsis a causé un affaissement d'au moins 300 m de l'écorce terrestre et a emmagasiné une telle quantité d'eau que le niveau marin s'est abaissé de 40-50 m. On a d'abord considéré l'inlandsis comme un complexe de glaciers fondamentalement indépendants; plus tard, on a cru qu'il s'agissait d'une seule nappe glaciaire centrée sur la baie d'Hudson; on a récemment démontré qu'il était formé d'au moins trois grandes masses coalescentes. L'inlandsis a également été la cause de modifications de la circulation atmosphérique et de la migration des biozones vers le sud; il a érodé les roches déjà altérées et recouvert de vastes étendues de dépôts fraîchement érodés. L'explication de l'évolution et de la dynamique de l'inlandsis a des répercussions sur la prospection des gîtes minéraux, la prévision ... |
format |
Text |
author |
Fulton, Robert J. Prest, Victor K. |
author_facet |
Fulton, Robert J. Prest, Victor K. |
author_sort |
Fulton, Robert J. |
title |
Introduction : The Laurentide Ice Sheet and its Significance |
title_short |
Introduction : The Laurentide Ice Sheet and its Significance |
title_full |
Introduction : The Laurentide Ice Sheet and its Significance |
title_fullStr |
Introduction : The Laurentide Ice Sheet and its Significance |
title_full_unstemmed |
Introduction : The Laurentide Ice Sheet and its Significance |
title_sort |
introduction : the laurentide ice sheet and its significance |
publisher |
Les Presses de l'Université de Montréal |
publishDate |
1987 |
url |
http://id.erudit.org/iderudit/032676ar |
long_lat |
ENVELOPE(-78.666,-78.666,58.417,58.417) ENVELOPE(-74.999,-74.999,58.500,58.500) |
geographic |
Baie d'Hudson Baie-d'Hudson Hudson Hudson Bay |
geographic_facet |
Baie d'Hudson Baie-d'Hudson Hudson Hudson Bay |
genre |
Baie d'Hudson Hudson Bay Ice Sheet |
genre_facet |
Baie d'Hudson Hudson Bay Ice Sheet |
op_source |
Géographie physique et Quaternaire |
op_relation |
10670/1.my4i95 http://id.erudit.org/iderudit/032676ar |
op_rights |
other |
_version_ |
1766366055105560576 |