Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale
The erosional morphology preserved at the sea bed in the eastern English Channel dominantly records denudation of the continental shelf by fluvial processes over multiple glacial-interglacial sea-level cycles rather than by catastrophic flooding through the Straits of Dover during the mid-Quaternary...
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Online Access: | https://eprints.whiterose.ac.uk/77090/ https://eprints.whiterose.ac.uk/77090/1/mellett_etal_2013_geomorph_final.pdf https://doi.org/10.1016/j.geomorph.2013.03.030 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:77090 2024-06-02T08:08:20+00:00 Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale Mellett, CL Hodgson, DM Plater, AJ Mauz, B Selby, I Lang, A 2013-12 text https://eprints.whiterose.ac.uk/77090/ https://eprints.whiterose.ac.uk/77090/1/mellett_etal_2013_geomorph_final.pdf https://doi.org/10.1016/j.geomorph.2013.03.030 en eng Elsevier https://eprints.whiterose.ac.uk/77090/1/mellett_etal_2013_geomorph_final.pdf Mellett, CL, Hodgson, DM, Plater, AJ et al. (3 more authors) (2013) Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale. Geomorphology, 203. 79 - 96. ISSN 0169-555X Article NonPeerReviewed 2013 ftleedsuniv https://doi.org/10.1016/j.geomorph.2013.03.030 2024-05-06T12:40:54Z The erosional morphology preserved at the sea bed in the eastern English Channel dominantly records denudation of the continental shelf by fluvial processes over multiple glacial-interglacial sea-level cycles rather than by catastrophic flooding through the Straits of Dover during the mid-Quaternary. Here, through the integration of multibeam bathymetry and shallow sub-bottom 2D seismic reflection profiles calibrated with vibrocore records, the first stratigraphic model of erosion and deposition on the eastern English Channel continental shelf is presented. Published Optical Stimulated Luminescence (OSL) and C ages were used to chronometrically constrain the stratigraphy and allow correlation of the continental shelf record with major climatic/sea-level periods. Five major erosion surfaces overlain by discrete sediment packages have been identified. The continental shelf in the eastern English Channel preserves a record of processes operating from Marine Isotope Stage (MIS) 6 to MIS 1. Planar and channelised erosion surfaces were formed by fluvial incision during lowstands or relative sea-level fall. The depth and lateral extent of incision was partly conditioned by underlying geology (rock type and tectonic structure), climatic conditions and changes in water and sediment discharge coupled to ice sheet dynamics and the drainage configuration of major rivers in Northwest Europe. Evidence for major erosion during or prior to MIS 6 is preserved. Fluvial sediments of MIS 2 age were identified within the Northern Palaeovalley, providing insights into the scale of erosion by normal fluvial regimes. Seismic and sedimentary facies indicate that deposition predominantly occurred during transgression when accommodation was created in palaeovalleys to allow discrete sediment bodies to form. Sediment reworking over multiple sea-level cycles (Saalian-Eemian-early Weichselian) by fluvial, coastal and marine processes created a multi-lateral, multi-storey succession of palaeovalley-fills that are preserved as a strath ... Article in Journal/Newspaper Ice Sheet White Rose Research Online (Universities of Leeds, Sheffield & York) Dover ENVELOPE(-55.753,-55.753,-83.777,-83.777) Geomorphology 203 79 96 |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
The erosional morphology preserved at the sea bed in the eastern English Channel dominantly records denudation of the continental shelf by fluvial processes over multiple glacial-interglacial sea-level cycles rather than by catastrophic flooding through the Straits of Dover during the mid-Quaternary. Here, through the integration of multibeam bathymetry and shallow sub-bottom 2D seismic reflection profiles calibrated with vibrocore records, the first stratigraphic model of erosion and deposition on the eastern English Channel continental shelf is presented. Published Optical Stimulated Luminescence (OSL) and C ages were used to chronometrically constrain the stratigraphy and allow correlation of the continental shelf record with major climatic/sea-level periods. Five major erosion surfaces overlain by discrete sediment packages have been identified. The continental shelf in the eastern English Channel preserves a record of processes operating from Marine Isotope Stage (MIS) 6 to MIS 1. Planar and channelised erosion surfaces were formed by fluvial incision during lowstands or relative sea-level fall. The depth and lateral extent of incision was partly conditioned by underlying geology (rock type and tectonic structure), climatic conditions and changes in water and sediment discharge coupled to ice sheet dynamics and the drainage configuration of major rivers in Northwest Europe. Evidence for major erosion during or prior to MIS 6 is preserved. Fluvial sediments of MIS 2 age were identified within the Northern Palaeovalley, providing insights into the scale of erosion by normal fluvial regimes. Seismic and sedimentary facies indicate that deposition predominantly occurred during transgression when accommodation was created in palaeovalleys to allow discrete sediment bodies to form. Sediment reworking over multiple sea-level cycles (Saalian-Eemian-early Weichselian) by fluvial, coastal and marine processes created a multi-lateral, multi-storey succession of palaeovalley-fills that are preserved as a strath ... |
format |
Article in Journal/Newspaper |
author |
Mellett, CL Hodgson, DM Plater, AJ Mauz, B Selby, I Lang, A |
spellingShingle |
Mellett, CL Hodgson, DM Plater, AJ Mauz, B Selby, I Lang, A Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale |
author_facet |
Mellett, CL Hodgson, DM Plater, AJ Mauz, B Selby, I Lang, A |
author_sort |
Mellett, CL |
title |
Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale |
title_short |
Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale |
title_full |
Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale |
title_fullStr |
Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale |
title_full_unstemmed |
Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale |
title_sort |
denudation of the continental shelf between britain and france at the glacial-interglacial timescale |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://eprints.whiterose.ac.uk/77090/ https://eprints.whiterose.ac.uk/77090/1/mellett_etal_2013_geomorph_final.pdf https://doi.org/10.1016/j.geomorph.2013.03.030 |
long_lat |
ENVELOPE(-55.753,-55.753,-83.777,-83.777) |
geographic |
Dover |
geographic_facet |
Dover |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://eprints.whiterose.ac.uk/77090/1/mellett_etal_2013_geomorph_final.pdf Mellett, CL, Hodgson, DM, Plater, AJ et al. (3 more authors) (2013) Denudation of the continental shelf between Britain and France at the glacial-interglacial timescale. Geomorphology, 203. 79 - 96. ISSN 0169-555X |
op_doi |
https://doi.org/10.1016/j.geomorph.2013.03.030 |
container_title |
Geomorphology |
container_volume |
203 |
container_start_page |
79 |
op_container_end_page |
96 |
_version_ |
1800753554035572736 |