Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland
High-resolution bathymetric data have been central to recent advances in the understanding of past dynamics of the former British–Irish Ice Sheet (BIIS). As approximately two-thirds of the former BIIS was probably marine-based during the Last Glacial Maximum (LGM) (c. 29–23 ka), geomorphic observati...
Published in: | Geological Society, London, Memoirs |
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Geological Society of London
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ftnerc:oai:nora.nerc.ac.uk:515819 2023-05-15T16:39:44+02:00 Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland Dove, D. Finlayson, A. Bradwell, T. Howe, J.A. Arosio, R. Dowdeswell, J.A. 2016 text http://nora.nerc.ac.uk/id/eprint/515819/ https://nora.nerc.ac.uk/id/eprint/515819/1/IH_assemblage_resub_30062015_with%20figs4%20NORA.pdf https://doi.org/10.1144/M46.144 en eng Geological Society of London https://nora.nerc.ac.uk/id/eprint/515819/1/IH_assemblage_resub_30062015_with%20figs4%20NORA.pdf Dove, D.; Finlayson, A.; Bradwell, T.; Howe, J.A.; Arosio, R. 2016 Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland. In: Dowdeswell, J.A., (ed.) Atlas of submarine glacial landforms : modern, Quaternary and ancient. London, UK, Geological Society of London, 135-138. (Geological Society Memoirs, 46). Publication - Book Section PeerReviewed 2016 ftnerc https://doi.org/10.1144/M46.144 2023-02-04T19:44:17Z High-resolution bathymetric data have been central to recent advances in the understanding of past dynamics of the former British–Irish Ice Sheet (BIIS). As approximately two-thirds of the former BIIS was probably marine-based during the Last Glacial Maximum (LGM) (c. 29–23 ka), geomorphic observations of the seabed are required increasingly to understand the extent, pattern and timing of past glaciation. Until recently, glacial reconstructions for the Inner Hebrides, offshore of western Scotland, have been based primarily on terrestrial observations. Previous workers have proposed generalized reconstructions in which the Inner Hebrides are located within a significant former ice-sheet flow pathway that drained the western Scottish sector of the BIIS, feeding the Barra Fan during the LGM and earlier glaciations (Fig. 1). Results from numerical ice-sheet modelling suggest that former ice-flow velocities within the region were on the order of hundreds to thousands of metres per year, but yield further insight by demonstrating how dynamic binge/purge cycles may have affected ice-sheet mass balance over time (Hubbard et al. 2009). Following the LGM, ice-sheet retreat through the area is estimated to have been in the order of 20 m per year (Clark et al. 2012). Here we present swath-bathymetric data from the Inner Hebrides that provide in situ constraints on ice-sheet flow and subsequent retreat dynamics from within this important sector of the BIIS. Book Part Ice Sheet Natural Environment Research Council: NERC Open Research Archive Barra ENVELOPE(-61.417,-61.417,-64.367,-64.367) Geological Society, London, Memoirs 46 1 135 138 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
High-resolution bathymetric data have been central to recent advances in the understanding of past dynamics of the former British–Irish Ice Sheet (BIIS). As approximately two-thirds of the former BIIS was probably marine-based during the Last Glacial Maximum (LGM) (c. 29–23 ka), geomorphic observations of the seabed are required increasingly to understand the extent, pattern and timing of past glaciation. Until recently, glacial reconstructions for the Inner Hebrides, offshore of western Scotland, have been based primarily on terrestrial observations. Previous workers have proposed generalized reconstructions in which the Inner Hebrides are located within a significant former ice-sheet flow pathway that drained the western Scottish sector of the BIIS, feeding the Barra Fan during the LGM and earlier glaciations (Fig. 1). Results from numerical ice-sheet modelling suggest that former ice-flow velocities within the region were on the order of hundreds to thousands of metres per year, but yield further insight by demonstrating how dynamic binge/purge cycles may have affected ice-sheet mass balance over time (Hubbard et al. 2009). Following the LGM, ice-sheet retreat through the area is estimated to have been in the order of 20 m per year (Clark et al. 2012). Here we present swath-bathymetric data from the Inner Hebrides that provide in situ constraints on ice-sheet flow and subsequent retreat dynamics from within this important sector of the BIIS. |
author2 |
Dowdeswell, J.A. |
format |
Book Part |
author |
Dove, D. Finlayson, A. Bradwell, T. Howe, J.A. Arosio, R. |
spellingShingle |
Dove, D. Finlayson, A. Bradwell, T. Howe, J.A. Arosio, R. Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland |
author_facet |
Dove, D. Finlayson, A. Bradwell, T. Howe, J.A. Arosio, R. |
author_sort |
Dove, D. |
title |
Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland |
title_short |
Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland |
title_full |
Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland |
title_fullStr |
Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland |
title_full_unstemmed |
Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland |
title_sort |
deglacial landform assemblage records fast ice-flow and retreat, inner hebrides, scotland |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/515819/ https://nora.nerc.ac.uk/id/eprint/515819/1/IH_assemblage_resub_30062015_with%20figs4%20NORA.pdf https://doi.org/10.1144/M46.144 |
long_lat |
ENVELOPE(-61.417,-61.417,-64.367,-64.367) |
geographic |
Barra |
geographic_facet |
Barra |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/515819/1/IH_assemblage_resub_30062015_with%20figs4%20NORA.pdf Dove, D.; Finlayson, A.; Bradwell, T.; Howe, J.A.; Arosio, R. 2016 Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland. In: Dowdeswell, J.A., (ed.) Atlas of submarine glacial landforms : modern, Quaternary and ancient. London, UK, Geological Society of London, 135-138. (Geological Society Memoirs, 46). |
op_doi |
https://doi.org/10.1144/M46.144 |
container_title |
Geological Society, London, Memoirs |
container_volume |
46 |
container_issue |
1 |
container_start_page |
135 |
op_container_end_page |
138 |
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1766030069114863616 |