Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet
The Malin Shelf, off north‐west Ireland, was an important zone of confluence for marine‐based ice streams of the former British–Irish Ice Sheet (BIIS). Legacy geophysical datasets are used to construct models of the seismic character, relative age and distribution of shelf sediments and landforms. B...
Published in: | Journal of Quaternary Science |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/529762/ https://doi.org/10.1002/jqs.3266 |
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ftnerc:oai:nora.nerc.ac.uk:529762 2023-05-15T13:41:45+02:00 Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet Craven, Kieran F. McCarron, Stephen Monteys, Xavier Dove, Dayton 2021-02 http://nora.nerc.ac.uk/id/eprint/529762/ https://doi.org/10.1002/jqs.3266 unknown Wiley Craven, Kieran F.; McCarron, Stephen; Monteys, Xavier; Dove, Dayton. 2021 Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet. Journal of Quaternary Science, 36 (2). 153-168. https://doi.org/10.1002/jqs.3266 <https://doi.org/10.1002/jqs.3266> Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1002/jqs.3266 2023-02-04T19:51:49Z The Malin Shelf, off north‐west Ireland, was an important zone of confluence for marine‐based ice streams of the former British–Irish Ice Sheet (BIIS). Legacy geophysical datasets are used to construct models of the seismic character, relative age and distribution of shelf sediments and landforms. Buried and surface landform assemblages provide evidence that during deglaciation of the Late Devensian BIIS, the region was occupied not by a single Hebrides Ice Stream as previously proposed, but by four discrete ice streams, here referred to as the Sea of the Hebrides (SHIS), Inner Hebrides, North Channel and Tory Island ice streams. Our observations of stratigraphic relationships between the deposits of these ice streams indicate physical interactions between them during shelf deglaciation. We interpret an initial dominant cross‐shelf flow along the SHIS impeding cross‐shelf ice flow from other ice sheet sectors. Following withdrawal of the SHIS grounding line from the shelf edge to mid‐shelf bathymetric highs during deglaciation, a reconfiguration of ice sheet flow paths allowed the expansion of smaller cross‐shelf ice streams draining central Scotland and north‐western Ireland. This internal dynamic behaviour provides a possible physical analogue for time‐transgressive flow patterns reported for outlets draining the West Antarctic Ice Sheet. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Natural Environment Research Council: NERC Open Research Archive Antarctic West Antarctic Ice Sheet Journal of Quaternary Science 36 2 153 168 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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unknown |
description |
The Malin Shelf, off north‐west Ireland, was an important zone of confluence for marine‐based ice streams of the former British–Irish Ice Sheet (BIIS). Legacy geophysical datasets are used to construct models of the seismic character, relative age and distribution of shelf sediments and landforms. Buried and surface landform assemblages provide evidence that during deglaciation of the Late Devensian BIIS, the region was occupied not by a single Hebrides Ice Stream as previously proposed, but by four discrete ice streams, here referred to as the Sea of the Hebrides (SHIS), Inner Hebrides, North Channel and Tory Island ice streams. Our observations of stratigraphic relationships between the deposits of these ice streams indicate physical interactions between them during shelf deglaciation. We interpret an initial dominant cross‐shelf flow along the SHIS impeding cross‐shelf ice flow from other ice sheet sectors. Following withdrawal of the SHIS grounding line from the shelf edge to mid‐shelf bathymetric highs during deglaciation, a reconfiguration of ice sheet flow paths allowed the expansion of smaller cross‐shelf ice streams draining central Scotland and north‐western Ireland. This internal dynamic behaviour provides a possible physical analogue for time‐transgressive flow patterns reported for outlets draining the West Antarctic Ice Sheet. |
format |
Article in Journal/Newspaper |
author |
Craven, Kieran F. McCarron, Stephen Monteys, Xavier Dove, Dayton |
spellingShingle |
Craven, Kieran F. McCarron, Stephen Monteys, Xavier Dove, Dayton Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet |
author_facet |
Craven, Kieran F. McCarron, Stephen Monteys, Xavier Dove, Dayton |
author_sort |
Craven, Kieran F. |
title |
Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet |
title_short |
Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet |
title_full |
Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet |
title_fullStr |
Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet |
title_full_unstemmed |
Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet |
title_sort |
interaction of multiple ice streams on the malin shelf during deglaciation of the last british–irish ice sheet |
publisher |
Wiley |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/529762/ https://doi.org/10.1002/jqs.3266 |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
Craven, Kieran F.; McCarron, Stephen; Monteys, Xavier; Dove, Dayton. 2021 Interaction of multiple ice streams on the Malin Shelf during deglaciation of the last British–Irish Ice Sheet. Journal of Quaternary Science, 36 (2). 153-168. https://doi.org/10.1002/jqs.3266 <https://doi.org/10.1002/jqs.3266> |
op_doi |
https://doi.org/10.1002/jqs.3266 |
container_title |
Journal of Quaternary Science |
container_volume |
36 |
container_issue |
2 |
container_start_page |
153 |
op_container_end_page |
168 |
_version_ |
1766157302323216384 |