Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec
Eastern Hudson Bay is characterized by falling relative sea level as a result of post-glacial isostatic rebound, which makes the region a natural laboratory for rapid forced regression, where the evolution of deltaic systems and offshore sedimentation patterns can be studied. A multidisciplinary app...
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crcansciencepubl:10.1139/e01-079 2024-04-28T08:23:15+00:00 Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec Lavoie, Caroline Allard, Michel Hill, Philip R 2002 http://dx.doi.org/10.1139/e01-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e01-079 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 39, issue 4, page 505-518 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2002 crcansciencepubl https://doi.org/10.1139/e01-079 2024-04-02T06:55:52Z Eastern Hudson Bay is characterized by falling relative sea level as a result of post-glacial isostatic rebound, which makes the region a natural laboratory for rapid forced regression, where the evolution of deltaic systems and offshore sedimentation patterns can be studied. A multidisciplinary approach involving airphoto analysis, offshore geophysical surveys, sediment coring, and facies and diatom analyses was used in this study of the Nastapoka River delta. The delta has formed as a result of the fluvial erosion of emerged Quaternary sediments but is mainly subaqueous. Offshore, in the prodelta zone, the oldest deposits are glaciomarine, laid down when the ice front of the receding Laurentide ice sheet stood on the Nastapoka hills some 77006800 years BP. Lateral equivalents of this glaciomarine unit are presently exposed on land. The shallow-water platform of the delta shows a thin surficial unit of wave-worked sand that overlies fine-grained, deeper water deposits derived from erosion of clay soils in the river catchment a few centuries ago, probably during periods of intense thermokarst activity. As the isostatic uplift continues, the deltaic platform will gradually emerge and be incised by the river channel. Article in Journal/Newspaper Hudson Bay Ice Sheet Nastapoka Thermokarst Canadian Science Publishing Canadian Journal of Earth Sciences 39 4 505 518 |
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Canadian Science Publishing |
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General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Lavoie, Caroline Allard, Michel Hill, Philip R Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec |
topic_facet |
General Earth and Planetary Sciences |
description |
Eastern Hudson Bay is characterized by falling relative sea level as a result of post-glacial isostatic rebound, which makes the region a natural laboratory for rapid forced regression, where the evolution of deltaic systems and offshore sedimentation patterns can be studied. A multidisciplinary approach involving airphoto analysis, offshore geophysical surveys, sediment coring, and facies and diatom analyses was used in this study of the Nastapoka River delta. The delta has formed as a result of the fluvial erosion of emerged Quaternary sediments but is mainly subaqueous. Offshore, in the prodelta zone, the oldest deposits are glaciomarine, laid down when the ice front of the receding Laurentide ice sheet stood on the Nastapoka hills some 77006800 years BP. Lateral equivalents of this glaciomarine unit are presently exposed on land. The shallow-water platform of the delta shows a thin surficial unit of wave-worked sand that overlies fine-grained, deeper water deposits derived from erosion of clay soils in the river catchment a few centuries ago, probably during periods of intense thermokarst activity. As the isostatic uplift continues, the deltaic platform will gradually emerge and be incised by the river channel. |
format |
Article in Journal/Newspaper |
author |
Lavoie, Caroline Allard, Michel Hill, Philip R |
author_facet |
Lavoie, Caroline Allard, Michel Hill, Philip R |
author_sort |
Lavoie, Caroline |
title |
Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec |
title_short |
Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec |
title_full |
Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec |
title_fullStr |
Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec |
title_full_unstemmed |
Holocene deltaic sedimentation along an emerging coast: Nastapoka River delta, eastern Hudson Bay, Quebec |
title_sort |
holocene deltaic sedimentation along an emerging coast: nastapoka river delta, eastern hudson bay, quebec |
publisher |
Canadian Science Publishing |
publishDate |
2002 |
url |
http://dx.doi.org/10.1139/e01-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e01-079 |
genre |
Hudson Bay Ice Sheet Nastapoka Thermokarst |
genre_facet |
Hudson Bay Ice Sheet Nastapoka Thermokarst |
op_source |
Canadian Journal of Earth Sciences volume 39, issue 4, page 505-518 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e01-079 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
39 |
container_issue |
4 |
container_start_page |
505 |
op_container_end_page |
518 |
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1797584325486575616 |