La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson
On the eastern coast of Hudson Bay, in the area between Great-Whale-River and the Richmond Gulf, the last wisconsinian ices flowed westward. The deglaciation took place between 8.100 l*C yr BP (Great-Whale-River) and 7.600 1 4 C yr BP (Richmond Gulf). The maximum limit of the Tyrrell Sea rises towar...
Published in: | Cahiers de géographie du Québec |
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Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
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Consortium Erudit
2005
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Online Access: | http://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf https://doi.org/10.7202/021319ar https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar/ https://core.ac.uk/display/59283743 https://www.erudit.org/revue/cgq/1976/v20/n50/021319ar.html?vue=resume http://id.erudit.org/iderudit/021319ar https://academic.microsoft.com/#/detail/2118283414 https://id.erudit.org/iderudit/021319ar |
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topic |
Sciences Humaines et Sociales Social Sciences and Humanities Quaternaire géomorphologie déglaciation relèvement isostatique Nouveau-Québec Baie d'Hudson (côte est) Quaternary geomorphology isosatic uplift Nouveau-Québec Hudson Bay (eastern coast) geo envir |
spellingShingle |
Sciences Humaines et Sociales Social Sciences and Humanities Quaternaire géomorphologie déglaciation relèvement isostatique Nouveau-Québec Baie d'Hudson (côte est) Quaternary geomorphology isosatic uplift Nouveau-Québec Hudson Bay (eastern coast) geo envir Claude Hillaire-Marcel La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson |
topic_facet |
Sciences Humaines et Sociales Social Sciences and Humanities Quaternaire géomorphologie déglaciation relèvement isostatique Nouveau-Québec Baie d'Hudson (côte est) Quaternary geomorphology isosatic uplift Nouveau-Québec Hudson Bay (eastern coast) geo envir |
description |
On the eastern coast of Hudson Bay, in the area between Great-Whale-River and the Richmond Gulf, the last wisconsinian ices flowed westward. The deglaciation took place between 8.100 l*C yr BP (Great-Whale-River) and 7.600 1 4 C yr BP (Richmond Gulf). The maximum limit of the Tyrrell Sea rises toward the south-east, from 230 m (north of Richmond Gulf) to 315 m (north of Manitounuk sound). In the Richmond Gulf, 185 successive raised beaches were built during the emergence of the land which followed the deglaciation. A 45 yr periodicity appears in their construction. Correlation between ï 4 C and sideral ages are in agreement with Suess' curve (1970). The emergence curve, established from the raised beaches, indicate a multiple component isostatic uplift. The land, first tilted toward NNE, is uplifted in relation to the main wisconsinian ice load on south-eastern Hudson Bay at the beginning, and later in relation to the more recent ice center of New Québec. The isostatic rate of uplift decreases from the 6,5 cm/yr at 6.000 14C yr BP, to a present rate of 1,1 cm/yr. A 20 m eustatic rise is observed between the deglaciation and 6.000 14C yr BP, when the sea level seemed similar to the present one. Variations in the rate of sea level changes indicate secondary eustatic oscillations of metric amplitude, which correspond to the main climatic events of that period of the Holocene. Sur la côte orientale de la baie d'Hudson, dans la région située entre Poste-de-la-Baleine et le golfe de Richmond, les dernières glaces wisconsiniennes se sont écoulées vers l'ouest; la déglaciation s'effectuant entre 8.100 ans 14C BP (Poste-de-la-Baleine) et 7,600 ans 14C BP (golfe de Richmond). L'altitude maximale atteinte par la mer postglaciaire de Tyrrell s'élève vers le sud-sud-ouest, passant de 230 m au nord du golfe de Richmond à 315 m à l'extrémité nord du détroit des Manitounuk. Au golfe de Richmond, 185 plages soulevées marquent l'émersion des terres depuis la déglaciation. On a pu mettre en évidence une périodicité de 45 ans ... |
format |
Article in Journal/Newspaper |
author |
Claude Hillaire-Marcel |
author_facet |
Claude Hillaire-Marcel |
author_sort |
Claude Hillaire-Marcel |
title |
La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson |
title_short |
La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson |
title_full |
La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson |
title_fullStr |
La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson |
title_full_unstemmed |
La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson |
title_sort |
la déglaciation et le relèvement isostatique sur la côte est de la baie d’hudson |
publisher |
Consortium Erudit |
publishDate |
2005 |
url |
http://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf https://doi.org/10.7202/021319ar https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar/ https://core.ac.uk/display/59283743 https://www.erudit.org/revue/cgq/1976/v20/n50/021319ar.html?vue=resume http://id.erudit.org/iderudit/021319ar https://academic.microsoft.com/#/detail/2118283414 https://id.erudit.org/iderudit/021319ar |
long_lat |
ENVELOPE(140.012,140.012,-66.649,-66.649) ENVELOPE(140.012,140.012,-66.649,-66.649) ENVELOPE(-78.666,-78.666,58.417,58.417) ENVELOPE(-74.999,-74.999,58.500,58.500) ENVELOPE(-69.512,-69.512,-69.634,-69.634) ENVELOPE(-77.750,-77.750,55.284,55.284) ENVELOPE(-77.416,-77.416,55.498,55.498) |
geographic |
Hudson Bay Hudson Baleine la Baleine Baie d'Hudson Baie-d'Hudson Tyrrell Poste-de-la-Baleine Manitounuk Sound |
geographic_facet |
Hudson Bay Hudson Baleine la Baleine Baie d'Hudson Baie-d'Hudson Tyrrell Poste-de-la-Baleine Manitounuk Sound |
genre |
Baie d'Hudson Great Whale River Hudson Bay Manitounuk Sound |
genre_facet |
Baie d'Hudson Great Whale River Hudson Bay Manitounuk Sound |
op_source |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::e6a71fdd9807f9368f2814abfa44a61b 2023-05-15T15:35:42+02:00 La déglaciation et le relèvement isostatique sur la côte est de la baie d’Hudson Isostatic deglaciation and raising on the east coast of the Bay of Hudson Claude Hillaire-Marcel 2005-04-12 http://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf https://doi.org/10.7202/021319ar https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar/ https://core.ac.uk/display/59283743 https://www.erudit.org/revue/cgq/1976/v20/n50/021319ar.html?vue=resume http://id.erudit.org/iderudit/021319ar https://academic.microsoft.com/#/detail/2118283414 https://id.erudit.org/iderudit/021319ar undefined unknown Consortium Erudit http://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar.pdf http://dx.doi.org/10.7202/021319ar https://www.erudit.org/fr/revues/cgq/1976-v20-n50-cgq2624/021319ar/ https://core.ac.uk/display/59283743 https://www.erudit.org/revue/cgq/1976/v20/n50/021319ar.html?vue=resume http://id.erudit.org/iderudit/021319ar https://academic.microsoft.com/#/detail/2118283414 https://id.erudit.org/iderudit/021319ar undefined 021319ar 10.7202/021319ar 2118283414 oai:erudit.org:021319ar 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|issn___print::1b1ed01b8c9603434e8a1c241e19f999 10|openaire____::8ac8380272269217cb09a928c8caa993 10|openaire____::5f532a3fc4f1ea403f37070f59a7a53a 10|opendoar____::16e6a3326dd7d868cbc926602a61e4d0 Sciences Humaines et Sociales Social Sciences and Humanities Quaternaire géomorphologie déglaciation relèvement isostatique Nouveau-Québec Baie d'Hudson (côte est) Quaternary geomorphology isosatic uplift Nouveau-Québec Hudson Bay (eastern coast) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2005 fttriple https://doi.org/10.7202/021319ar 2023-01-22T17:21:35Z On the eastern coast of Hudson Bay, in the area between Great-Whale-River and the Richmond Gulf, the last wisconsinian ices flowed westward. The deglaciation took place between 8.100 l*C yr BP (Great-Whale-River) and 7.600 1 4 C yr BP (Richmond Gulf). The maximum limit of the Tyrrell Sea rises toward the south-east, from 230 m (north of Richmond Gulf) to 315 m (north of Manitounuk sound). In the Richmond Gulf, 185 successive raised beaches were built during the emergence of the land which followed the deglaciation. A 45 yr periodicity appears in their construction. Correlation between ï 4 C and sideral ages are in agreement with Suess' curve (1970). The emergence curve, established from the raised beaches, indicate a multiple component isostatic uplift. The land, first tilted toward NNE, is uplifted in relation to the main wisconsinian ice load on south-eastern Hudson Bay at the beginning, and later in relation to the more recent ice center of New Québec. The isostatic rate of uplift decreases from the 6,5 cm/yr at 6.000 14C yr BP, to a present rate of 1,1 cm/yr. A 20 m eustatic rise is observed between the deglaciation and 6.000 14C yr BP, when the sea level seemed similar to the present one. Variations in the rate of sea level changes indicate secondary eustatic oscillations of metric amplitude, which correspond to the main climatic events of that period of the Holocene. Sur la côte orientale de la baie d'Hudson, dans la région située entre Poste-de-la-Baleine et le golfe de Richmond, les dernières glaces wisconsiniennes se sont écoulées vers l'ouest; la déglaciation s'effectuant entre 8.100 ans 14C BP (Poste-de-la-Baleine) et 7,600 ans 14C BP (golfe de Richmond). L'altitude maximale atteinte par la mer postglaciaire de Tyrrell s'élève vers le sud-sud-ouest, passant de 230 m au nord du golfe de Richmond à 315 m à l'extrémité nord du détroit des Manitounuk. Au golfe de Richmond, 185 plages soulevées marquent l'émersion des terres depuis la déglaciation. On a pu mettre en évidence une périodicité de 45 ans ... Article in Journal/Newspaper Baie d'Hudson Great Whale River Hudson Bay Manitounuk Sound Unknown Hudson Bay Hudson Baleine ENVELOPE(140.012,140.012,-66.649,-66.649) la Baleine ENVELOPE(140.012,140.012,-66.649,-66.649) Baie d'Hudson ENVELOPE(-78.666,-78.666,58.417,58.417) Baie-d'Hudson ENVELOPE(-74.999,-74.999,58.500,58.500) Tyrrell ENVELOPE(-69.512,-69.512,-69.634,-69.634) Poste-de-la-Baleine ENVELOPE(-77.750,-77.750,55.284,55.284) Manitounuk Sound ENVELOPE(-77.416,-77.416,55.498,55.498) Cahiers de géographie du Québec 20 50 185 220 |