The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict
The deposits identified as being the Drift des Demoiselles, which is the upper unit of the southern Magdalen Islands (Québec, Canada), belong to two units of different origin, glacial and glaciomarine. At Anse à la Cabane, the glacial deposit comprises two subunits: a glacitectonite at the base and...
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crcansciencepubl:10.1139/cjes-2011-0115 2024-09-15T18:11:47+00:00 The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict Rémillard, Audrey M. Hétu, Bernard Bernatchez, Pascal Bertran, Pascal Fisher, Timothy G. 2013 http://dx.doi.org/10.1139/cjes-2011-0115 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2011-0115 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2011-0115 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 50, issue 5, page 545-563 ISSN 0008-4077 1480-3313 journal-article 2013 crcansciencepubl https://doi.org/10.1139/cjes-2011-0115 2024-08-01T04:10:03Z The deposits identified as being the Drift des Demoiselles, which is the upper unit of the southern Magdalen Islands (Québec, Canada), belong to two units of different origin, glacial and glaciomarine. At Anse à la Cabane, the glacial deposit comprises two subunits: a glacitectonite at the base and a subglacial traction till at the top. Numerous glaciotectonic deformation structures suggest ice flow towards the southeast. The till is above an organic horizon dated to ∼47–50 ka BP. New data presented here show that the southern part of the Magdalen archipelago was glaciated during the Late Wisconsinan. We relate this ice flow to the Escuminac ice cap, whose centre of dispersion was located in the Gulf of St. Lawrence, northwest of the islands. At Anse au Plâtre, the top of the Drift des Demoiselles is a glaciomarine deposit. At Anse à la Cabane, the till is covered by a stratified subtidal unit located at ∼20 m above sea level. Both were deposited during the marine transgression that followed deglaciation. At Anse à la Cabane, three ice-wedge casts truncate the till and the subtidal unit, providing evidence that periglacial conditions occurred on the archipelago after deglaciation. Article in Journal/Newspaper Ice cap Canadian Science Publishing Canadian Journal of Earth Sciences 50 5 545 563 |
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Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The deposits identified as being the Drift des Demoiselles, which is the upper unit of the southern Magdalen Islands (Québec, Canada), belong to two units of different origin, glacial and glaciomarine. At Anse à la Cabane, the glacial deposit comprises two subunits: a glacitectonite at the base and a subglacial traction till at the top. Numerous glaciotectonic deformation structures suggest ice flow towards the southeast. The till is above an organic horizon dated to ∼47–50 ka BP. New data presented here show that the southern part of the Magdalen archipelago was glaciated during the Late Wisconsinan. We relate this ice flow to the Escuminac ice cap, whose centre of dispersion was located in the Gulf of St. Lawrence, northwest of the islands. At Anse au Plâtre, the top of the Drift des Demoiselles is a glaciomarine deposit. At Anse à la Cabane, the till is covered by a stratified subtidal unit located at ∼20 m above sea level. Both were deposited during the marine transgression that followed deglaciation. At Anse à la Cabane, three ice-wedge casts truncate the till and the subtidal unit, providing evidence that periglacial conditions occurred on the archipelago after deglaciation. |
author2 |
Fisher, Timothy G. |
format |
Article in Journal/Newspaper |
author |
Rémillard, Audrey M. Hétu, Bernard Bernatchez, Pascal Bertran, Pascal |
spellingShingle |
Rémillard, Audrey M. Hétu, Bernard Bernatchez, Pascal Bertran, Pascal The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict |
author_facet |
Rémillard, Audrey M. Hétu, Bernard Bernatchez, Pascal Bertran, Pascal |
author_sort |
Rémillard, Audrey M. |
title |
The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict |
title_short |
The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict |
title_full |
The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict |
title_fullStr |
The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict |
title_full_unstemmed |
The Drift des Demoiselles on the Magdalen Islands (Québec, Canada): sedimentological and micromorphological evidence of a Late Wisconsinan glacial diamict |
title_sort |
drift des demoiselles on the magdalen islands (québec, canada): sedimentological and micromorphological evidence of a late wisconsinan glacial diamict |
publisher |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.1139/cjes-2011-0115 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjes-2011-0115 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjes-2011-0115 |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Canadian Journal of Earth Sciences volume 50, issue 5, page 545-563 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2011-0115 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
50 |
container_issue |
5 |
container_start_page |
545 |
op_container_end_page |
563 |
_version_ |
1810449354434019328 |