Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada)
International audience Widely spread worldwide, beach-ridge systems are established along prograding coastlines, either fostered by a falling Relative Sea-Level (RSL), by substantial sediment stocks being provided to the coastline, or by the combination of both agents. As such, they can form valuabl...
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Online Access: | https://hal.science/hal-04203971 https://doi.org/10.1016/j.quascirev.2023.107972 |
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ftunivbrest:oai:HAL:hal-04203971v1 2024-04-28T08:23:58+00:00 Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada) Goslin, Jerome Bernatchez, P. Barnett, R.L. Hétu, B. Didier, D. Béland, C. Dubé, J. Geo-Ocean (GEO-OCEAN) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2023-03 https://hal.science/hal-04203971 https://doi.org/10.1016/j.quascirev.2023.107972 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2023.107972 hal-04203971 https://hal.science/hal-04203971 doi:10.1016/j.quascirev.2023.107972 ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-04203971 Quaternary Science Reviews, 2023, 303, 107972 (21p.). ⟨10.1016/j.quascirev.2023.107972⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftunivbrest https://doi.org/10.1016/j.quascirev.2023.107972 2024-04-04T17:01:31Z International audience Widely spread worldwide, beach-ridge systems are established along prograding coastlines, either fostered by a falling Relative Sea-Level (RSL), by substantial sediment stocks being provided to the coastline, or by the combination of both agents. As such, they can form valuable archives of either large scale RSL and isostatic dynamics and/or of more local coastal processes, e.g. related to variations in riverine sediment supply. In this study, we analyze three raised beach-ridge complexes located on the island of Anticosti (Gulf of St.-Lawrence, Québec, Canada). Using both field and LiDAR DEM data, we produce new RSL histories for the north-eastern and north-western sectors of Anticosti Island region over the ca. 14.400 to 8.300 yrs cal. B.P. period. These new sea-level data allow to considerably refine the postglacial RSL history of the region, hence carrying large implications for the comprehension of the isostatic dynamics of the St-Lawrence region. Considerable misfits between our observations and outputs of the GIA models notably allow to propose refinements on the LIS architecture and melting history as well as on the rheological characteristics of the St-Lawrence valley. Locally, chronologies of progradation of the beach-ridges were mostly forced by RSL changes, yet also apparently recorded the demise of the local Anticosti remnant ice-cap throughout the changes in sediment supply the melting of the latter produced locally. Finally, some results of paleo-oceanographic significance could also be derived from the study of the beach-ridges, pertaining for instance to changes in sea-ice cover. Article in Journal/Newspaper Ice cap Ice Sheet Sea ice Université de Bretagne Occidentale: HAL Quaternary Science Reviews 303 107972 |
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Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Goslin, Jerome Bernatchez, P. Barnett, R.L. Hétu, B. Didier, D. Béland, C. Dubé, J. Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada) |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Widely spread worldwide, beach-ridge systems are established along prograding coastlines, either fostered by a falling Relative Sea-Level (RSL), by substantial sediment stocks being provided to the coastline, or by the combination of both agents. As such, they can form valuable archives of either large scale RSL and isostatic dynamics and/or of more local coastal processes, e.g. related to variations in riverine sediment supply. In this study, we analyze three raised beach-ridge complexes located on the island of Anticosti (Gulf of St.-Lawrence, Québec, Canada). Using both field and LiDAR DEM data, we produce new RSL histories for the north-eastern and north-western sectors of Anticosti Island region over the ca. 14.400 to 8.300 yrs cal. B.P. period. These new sea-level data allow to considerably refine the postglacial RSL history of the region, hence carrying large implications for the comprehension of the isostatic dynamics of the St-Lawrence region. Considerable misfits between our observations and outputs of the GIA models notably allow to propose refinements on the LIS architecture and melting history as well as on the rheological characteristics of the St-Lawrence valley. Locally, chronologies of progradation of the beach-ridges were mostly forced by RSL changes, yet also apparently recorded the demise of the local Anticosti remnant ice-cap throughout the changes in sediment supply the melting of the latter produced locally. Finally, some results of paleo-oceanographic significance could also be derived from the study of the beach-ridges, pertaining for instance to changes in sea-ice cover. |
author2 |
Geo-Ocean (GEO-OCEAN) Université de Bretagne Sud (UBS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Goslin, Jerome Bernatchez, P. Barnett, R.L. Hétu, B. Didier, D. Béland, C. Dubé, J. |
author_facet |
Goslin, Jerome Bernatchez, P. Barnett, R.L. Hétu, B. Didier, D. Béland, C. Dubé, J. |
author_sort |
Goslin, Jerome |
title |
Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada) |
title_short |
Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada) |
title_full |
Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada) |
title_fullStr |
Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada) |
title_full_unstemmed |
Post-glacial RSL changes and the demise of a local remnant Laurentide Ice-Sheet ice cap: A view from Anticosti island beach-ridges (Gulf of St Lawrence, Canada) |
title_sort |
post-glacial rsl changes and the demise of a local remnant laurentide ice-sheet ice cap: a view from anticosti island beach-ridges (gulf of st lawrence, canada) |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04203971 https://doi.org/10.1016/j.quascirev.2023.107972 |
genre |
Ice cap Ice Sheet Sea ice |
genre_facet |
Ice cap Ice Sheet Sea ice |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-04203971 Quaternary Science Reviews, 2023, 303, 107972 (21p.). ⟨10.1016/j.quascirev.2023.107972⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2023.107972 hal-04203971 https://hal.science/hal-04203971 doi:10.1016/j.quascirev.2023.107972 |
op_doi |
https://doi.org/10.1016/j.quascirev.2023.107972 |
container_title |
Quaternary Science Reviews |
container_volume |
303 |
container_start_page |
107972 |
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1797584551358234624 |