Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic
International audience The internal architecture of a beach-ridge system can provide clues into the processes involved in its formation. Detailed investigation of the mixed sand-and-gravel beach-ridge plain on the Miquelon-Langlade Barrier (northwest Atlantic Ocean, south of Newfoundland) provides a...
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Online Access: | https://hal-univ-perp.archives-ouvertes.fr/hal-01266703 https://doi.org/10.1016/j.margeo.2014.07.011 |
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ftunivnantes:oai:HAL:hal-01266703v1 2023-05-15T17:22:52+02:00 Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic Billy, Julie Robin, Nicolas Hein, Christopher J. Certain, Raphaël Fitzgerald, Duncan M. Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Virginia Institute of Marine Science (VIMS) Department of Earth and Environment Boston Boston University Boston (BU) 2014-11 https://hal-univ-perp.archives-ouvertes.fr/hal-01266703 https://doi.org/10.1016/j.margeo.2014.07.011 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2014.07.011 hal-01266703 https://hal-univ-perp.archives-ouvertes.fr/hal-01266703 doi:10.1016/j.margeo.2014.07.011 ISSN: 0025-3227 Marine Geology https://hal-univ-perp.archives-ouvertes.fr/hal-01266703 Marine Geology, Elsevier, 2014, 357, pp.Pages 53-71. ⟨10.1016/j.margeo.2014.07.011⟩ Regressive barrier Beach ridge Internal architecture GPR Wave-built facies Gulf of Saint Lawrence [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2014 ftunivnantes https://doi.org/10.1016/j.margeo.2014.07.011 2022-10-19T00:18:15Z International audience The internal architecture of a beach-ridge system can provide clues into the processes involved in its formation. Detailed investigation of the mixed sand-and-gravel beach-ridge plain on the Miquelon-Langlade Barrier (northwest Atlantic Ocean, south of Newfoundland) provides a better understanding of such sedimentary systems in terms of internal architecture, depositional processes and driving mechanisms. Investigations of this regressive paraglacial barrier included the topographic (RTK-GPS) and ground-penetrating radar (100 to 500 MHz antennae) data collection, orthophotographs and optically stimulated luminescence (OSL) dating. The Miquelon-Langlade beach-ridge plain is composed of two opposing progradational systems, reflecting contrasting eastward and westward hydrodynamic exposures. Four ridge sets, each with concave planform shapes, define the 500–1400-m wide eastward prograding plain along the sheltered eastern coast. Two ridge-sets with linear and fan-shaped planforms define the 200–500-m wide south-westward prograding plain along the energetic western coast.Beach-ridge units overlay a basal sedimentary unit that disrupted incoming wave energy and altered the planform morphology of the prograding plain. The internal architecture pattern of individual beach ridges are characterized by sigmoidal configurations with seaward-dipping beds (2.3–4.7° true dip-angles). It is proposed that these wave-built facies are deposited as beach berms, likely by fair-weather waves. The elevations of these facies are determined by the sea level elevation and the swash height of constructive waves during their formation. Beach ridges are overlain by either peat resulting from the flooding of topographically low-lying areas, or by aeolian sand deposits of varying heights and morphologies (relict foredunes).Despite the differences in wave exposure along each coast, the sedimentary composition and internal architecture of the two progradational systems are broadly similar; bed dip angles of the ... Article in Journal/Newspaper Newfoundland Northwest Atlantic Université de Nantes: HAL-UNIV-NANTES Swash ENVELOPE(-67.524,-67.524,-67.581,-67.581) Marine Geology 357 53 71 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Regressive barrier Beach ridge Internal architecture GPR Wave-built facies Gulf of Saint Lawrence [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Regressive barrier Beach ridge Internal architecture GPR Wave-built facies Gulf of Saint Lawrence [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Billy, Julie Robin, Nicolas Hein, Christopher J. Certain, Raphaël Fitzgerald, Duncan M. Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic |
topic_facet |
Regressive barrier Beach ridge Internal architecture GPR Wave-built facies Gulf of Saint Lawrence [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The internal architecture of a beach-ridge system can provide clues into the processes involved in its formation. Detailed investigation of the mixed sand-and-gravel beach-ridge plain on the Miquelon-Langlade Barrier (northwest Atlantic Ocean, south of Newfoundland) provides a better understanding of such sedimentary systems in terms of internal architecture, depositional processes and driving mechanisms. Investigations of this regressive paraglacial barrier included the topographic (RTK-GPS) and ground-penetrating radar (100 to 500 MHz antennae) data collection, orthophotographs and optically stimulated luminescence (OSL) dating. The Miquelon-Langlade beach-ridge plain is composed of two opposing progradational systems, reflecting contrasting eastward and westward hydrodynamic exposures. Four ridge sets, each with concave planform shapes, define the 500–1400-m wide eastward prograding plain along the sheltered eastern coast. Two ridge-sets with linear and fan-shaped planforms define the 200–500-m wide south-westward prograding plain along the energetic western coast.Beach-ridge units overlay a basal sedimentary unit that disrupted incoming wave energy and altered the planform morphology of the prograding plain. The internal architecture pattern of individual beach ridges are characterized by sigmoidal configurations with seaward-dipping beds (2.3–4.7° true dip-angles). It is proposed that these wave-built facies are deposited as beach berms, likely by fair-weather waves. The elevations of these facies are determined by the sea level elevation and the swash height of constructive waves during their formation. Beach ridges are overlain by either peat resulting from the flooding of topographically low-lying areas, or by aeolian sand deposits of varying heights and morphologies (relict foredunes).Despite the differences in wave exposure along each coast, the sedimentary composition and internal architecture of the two progradational systems are broadly similar; bed dip angles of the ... |
author2 |
Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM) Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Virginia Institute of Marine Science (VIMS) Department of Earth and Environment Boston Boston University Boston (BU) |
format |
Article in Journal/Newspaper |
author |
Billy, Julie Robin, Nicolas Hein, Christopher J. Certain, Raphaël Fitzgerald, Duncan M. |
author_facet |
Billy, Julie Robin, Nicolas Hein, Christopher J. Certain, Raphaël Fitzgerald, Duncan M. |
author_sort |
Billy, Julie |
title |
Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic |
title_short |
Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic |
title_full |
Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic |
title_fullStr |
Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic |
title_full_unstemmed |
Internal architecture of mixed sand-and-gravel beach ridges: Miquelon-Langlade Barrier, NW Atlantic |
title_sort |
internal architecture of mixed sand-and-gravel beach ridges: miquelon-langlade barrier, nw atlantic |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal-univ-perp.archives-ouvertes.fr/hal-01266703 https://doi.org/10.1016/j.margeo.2014.07.011 |
long_lat |
ENVELOPE(-67.524,-67.524,-67.581,-67.581) |
geographic |
Swash |
geographic_facet |
Swash |
genre |
Newfoundland Northwest Atlantic |
genre_facet |
Newfoundland Northwest Atlantic |
op_source |
ISSN: 0025-3227 Marine Geology https://hal-univ-perp.archives-ouvertes.fr/hal-01266703 Marine Geology, Elsevier, 2014, 357, pp.Pages 53-71. ⟨10.1016/j.margeo.2014.07.011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.margeo.2014.07.011 hal-01266703 https://hal-univ-perp.archives-ouvertes.fr/hal-01266703 doi:10.1016/j.margeo.2014.07.011 |
op_doi |
https://doi.org/10.1016/j.margeo.2014.07.011 |
container_title |
Marine Geology |
container_volume |
357 |
container_start_page |
53 |
op_container_end_page |
71 |
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1766109768150155264 |