Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction
The boundary conditions that govern ice sheet dynamics can change significantly with the development of marine margins. This paper uses the glacial landscape in western Scotland to reconstruct changes in the British-Irish Ice Sheet that accompanied the growth and decay of a marine sector over the Ma...
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fttriple:oai:gotriple.eu:10670/1.sn8s28 2023-05-15T16:39:35+02:00 Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction Finlayson, Andrew Fabel, Derek Bradwell, Tom Sugden, David 2014-01-01 https://doi.org/10.1016/j.quascirev.2013.10.009 https://archimer.ifremer.fr/doc/00291/40240/83001.pdf https://archimer.ifremer.fr/doc/00291/40240/ en eng Pergamon-elsevier Science Ltd doi:10.1016/j.quascirev.2013.10.009 10670/1.sn8s28 https://archimer.ifremer.fr/doc/00291/40240/83001.pdf https://archimer.ifremer.fr/doc/00291/40240/ Archimer, archive institutionnelle de l'Ifremer Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2014-01-01 , Vol. 83 , P. 28-45 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2014 fttriple https://doi.org/10.1016/j.quascirev.2013.10.009 2023-01-22T18:44:42Z The boundary conditions that govern ice sheet dynamics can change significantly with the development of marine margins. This paper uses the glacial landscape in western Scotland to reconstruct changes in the British-Irish Ice Sheet that accompanied the growth and decay of a marine sector over the Malin Shelf. Ice advanced from a restricted mountain ice sheet with tidewater margins after similar to 35 ka BP, and reached the continental shelf in similar to 7 ka (average rate of similar to 30 m a(-1)). Early ice flow had been directed through north-south, geologically controlled, over-deepened fjords that were carved during previous 'restricted' glaciations. This flow regime was abandoned with development of the Malin Shelf ice sheet sector; ice flow direction switched by similar to 90 degrees and was drawn westwards towards the shelf edge. The marine ice sheet phase saw episodes of west-east ice divide migration by up to 60 km over west central Scotland, possibly linked to ice streaming and calving events at the ice sheet margin. However, permanent and stationary ice divides and zones of cold-based ice, associated with subglacial topographic highs, also characterised the marine glacial stage over western Scotland. The North Channel ice divide remained a constant, though migratory feature while the BIIS occupied the Malin Shelf; it finally collapsed at the end of the Millard Point Stadial when the Irish Ice Sheet began to rapidly decay similar to 16.5 ka BP. This permitted the Scottish Ice Sheet to temporarily advance over north-east Ireland (previously identified as the East Antrim Coastal Readvance) before it too retreated, at rates in the order of 102 m a(-1). Although the imprint of extensive shelf-edge ice sheet glaciation exists in the coastal landscape of western Scotland, the dominant landscape features relate to a restricted, marine-proximal mountain ice sheet with markedly different flow configurations. Similar first-order geomorphological features, relating to 'restricted' glacial conditions, are likely ... Text Ice Sheet Unknown Quaternary Science Reviews 83 28 45 |
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geo envir Finlayson, Andrew Fabel, Derek Bradwell, Tom Sugden, David Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction |
topic_facet |
geo envir |
description |
The boundary conditions that govern ice sheet dynamics can change significantly with the development of marine margins. This paper uses the glacial landscape in western Scotland to reconstruct changes in the British-Irish Ice Sheet that accompanied the growth and decay of a marine sector over the Malin Shelf. Ice advanced from a restricted mountain ice sheet with tidewater margins after similar to 35 ka BP, and reached the continental shelf in similar to 7 ka (average rate of similar to 30 m a(-1)). Early ice flow had been directed through north-south, geologically controlled, over-deepened fjords that were carved during previous 'restricted' glaciations. This flow regime was abandoned with development of the Malin Shelf ice sheet sector; ice flow direction switched by similar to 90 degrees and was drawn westwards towards the shelf edge. The marine ice sheet phase saw episodes of west-east ice divide migration by up to 60 km over west central Scotland, possibly linked to ice streaming and calving events at the ice sheet margin. However, permanent and stationary ice divides and zones of cold-based ice, associated with subglacial topographic highs, also characterised the marine glacial stage over western Scotland. The North Channel ice divide remained a constant, though migratory feature while the BIIS occupied the Malin Shelf; it finally collapsed at the end of the Millard Point Stadial when the Irish Ice Sheet began to rapidly decay similar to 16.5 ka BP. This permitted the Scottish Ice Sheet to temporarily advance over north-east Ireland (previously identified as the East Antrim Coastal Readvance) before it too retreated, at rates in the order of 102 m a(-1). Although the imprint of extensive shelf-edge ice sheet glaciation exists in the coastal landscape of western Scotland, the dominant landscape features relate to a restricted, marine-proximal mountain ice sheet with markedly different flow configurations. Similar first-order geomorphological features, relating to 'restricted' glacial conditions, are likely ... |
format |
Text |
author |
Finlayson, Andrew Fabel, Derek Bradwell, Tom Sugden, David |
author_facet |
Finlayson, Andrew Fabel, Derek Bradwell, Tom Sugden, David |
author_sort |
Finlayson, Andrew |
title |
Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction |
title_short |
Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction |
title_full |
Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction |
title_fullStr |
Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction |
title_full_unstemmed |
Growth and decay of a marine terminating sector of the last British-Irish Ice Sheet: a geomorphological reconstruction |
title_sort |
growth and decay of a marine terminating sector of the last british-irish ice sheet: a geomorphological reconstruction |
publisher |
Pergamon-elsevier Science Ltd |
publishDate |
2014 |
url |
https://doi.org/10.1016/j.quascirev.2013.10.009 https://archimer.ifremer.fr/doc/00291/40240/83001.pdf https://archimer.ifremer.fr/doc/00291/40240/ |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Archimer, archive institutionnelle de l'Ifremer Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2014-01-01 , Vol. 83 , P. 28-45 |
op_relation |
doi:10.1016/j.quascirev.2013.10.009 10670/1.sn8s28 https://archimer.ifremer.fr/doc/00291/40240/83001.pdf https://archimer.ifremer.fr/doc/00291/40240/ |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.10.009 |
container_title |
Quaternary Science Reviews |
container_volume |
83 |
container_start_page |
28 |
op_container_end_page |
45 |
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1766029922601533440 |