The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction
Glacimarine processes affect about 20% of the global ocean today, and this area expanded considerably under cyclical full-glacial conditions during the Quaternary (Fig. 1) (Dowdeswell et al. 2016b). Many of the submarine landforms produced at the base and margin of past ice sheets remain well preser...
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ftnerc:oai:nora.nerc.ac.uk:515716 2023-05-15T16:41:00+02:00 The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction Dowdeswell, J. A. Canals, M. Jakobsson, M. Todd, B. J. Dowdeswell, E. K. Hogan, K. A. Dowdeswell, J.A. Canals, M. Jakobsson, M. Todd, B.J. Dowdeswell, E.K. Hogan, K.A. 2016 http://nora.nerc.ac.uk/id/eprint/515716/ https://doi.org/10.1144/M46.183 unknown Geological Society of London Dowdeswell, J. A.; Canals, M.; Jakobsson, M.; Todd, B. J.; Dowdeswell, E. K.; Hogan, K. A. orcid:0000-0002-1256-8010 . 2016 The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction. In: Dowdeswell, J.A.; Canals, M.; Jakobsson, M.; Todd, B.J.; Dowdeswell, E.K.; Hogan, K.A. orcid:0000-0002-1256-8010 , (eds.) Atlas of submarine glacial landforms: modern, Quaternary, ancient. London, Geological Society of London, 519-552. (Geological Society Memoir, 46, 46). Publication - Book Section PeerReviewed 2016 ftnerc https://doi.org/10.1144/M46.183 2023-02-04T19:44:13Z Glacimarine processes affect about 20% of the global ocean today, and this area expanded considerably under cyclical full-glacial conditions during the Quaternary (Fig. 1) (Dowdeswell et al. 2016b). Many of the submarine landforms produced at the base and margin of past ice sheets remain well preserved on the seafloor in fjords and on high-latitude continental shelves after the retreat of the ice that produced them. These glacial landforms, protected from subaerial erosion and beneath wave-base and tidal currents in water that is often hundreds of metres deep, are gradually buried by both hemipelagic and glacimarine sedimentation; they may be preserved over long periods in the geological record if palaeo-continental shelves are not reworked by subsequent glacier advances or bottom currents (Dowdeswell et al. 2007). This means that, first, submarine glacial landforms can be observed at or close to the modern seafloor after retreat of the last great ice sheets from their most recent Quaternary maximum about 18–20 000 years ago using swath-bathymetric mapping systems and, secondly, buried glacial landforms may also be identified and examined within glacial-sedimentary sequences from Quaternary and earlier ice ages using seismic-reflection methods. Book Part Ice Sheet Natural Environment Research Council: NERC Open Research Archive Geological Society, London, Memoirs 46 1 519 552 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Glacimarine processes affect about 20% of the global ocean today, and this area expanded considerably under cyclical full-glacial conditions during the Quaternary (Fig. 1) (Dowdeswell et al. 2016b). Many of the submarine landforms produced at the base and margin of past ice sheets remain well preserved on the seafloor in fjords and on high-latitude continental shelves after the retreat of the ice that produced them. These glacial landforms, protected from subaerial erosion and beneath wave-base and tidal currents in water that is often hundreds of metres deep, are gradually buried by both hemipelagic and glacimarine sedimentation; they may be preserved over long periods in the geological record if palaeo-continental shelves are not reworked by subsequent glacier advances or bottom currents (Dowdeswell et al. 2007). This means that, first, submarine glacial landforms can be observed at or close to the modern seafloor after retreat of the last great ice sheets from their most recent Quaternary maximum about 18–20 000 years ago using swath-bathymetric mapping systems and, secondly, buried glacial landforms may also be identified and examined within glacial-sedimentary sequences from Quaternary and earlier ice ages using seismic-reflection methods. |
author2 |
Dowdeswell, J.A. Canals, M. Jakobsson, M. Todd, B.J. Dowdeswell, E.K. Hogan, K.A. |
format |
Book Part |
author |
Dowdeswell, J. A. Canals, M. Jakobsson, M. Todd, B. J. Dowdeswell, E. K. Hogan, K. A. |
spellingShingle |
Dowdeswell, J. A. Canals, M. Jakobsson, M. Todd, B. J. Dowdeswell, E. K. Hogan, K. A. The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction |
author_facet |
Dowdeswell, J. A. Canals, M. Jakobsson, M. Todd, B. J. Dowdeswell, E. K. Hogan, K. A. |
author_sort |
Dowdeswell, J. A. |
title |
The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction |
title_short |
The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction |
title_full |
The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction |
title_fullStr |
The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction |
title_full_unstemmed |
The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction |
title_sort |
variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/515716/ https://doi.org/10.1144/M46.183 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Dowdeswell, J. A.; Canals, M.; Jakobsson, M.; Todd, B. J.; Dowdeswell, E. K.; Hogan, K. A. orcid:0000-0002-1256-8010 . 2016 The variety and distribution of submarine glacial landforms and implications for ice-sheet reconstruction. In: Dowdeswell, J.A.; Canals, M.; Jakobsson, M.; Todd, B.J.; Dowdeswell, E.K.; Hogan, K.A. orcid:0000-0002-1256-8010 , (eds.) Atlas of submarine glacial landforms: modern, Quaternary, ancient. London, Geological Society of London, 519-552. (Geological Society Memoir, 46, 46). |
op_doi |
https://doi.org/10.1144/M46.183 |
container_title |
Geological Society, London, Memoirs |
container_volume |
46 |
container_issue |
1 |
container_start_page |
519 |
op_container_end_page |
552 |
_version_ |
1766031433667706880 |