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Submarine landform assemblage produced beneath the Dotson-Getz palaeo-ice stream, West Antarctica

Graham, A.G.C.; Nitsche, F.O.; Larter, R.D.; Gohl, K.. 2016 Submarine landform assemblage produced beneath the Dotson-Getz palaeo-ice stream, West Antarctica. In: Dowdeswell, J.A.; Canals, M.; Jakobsson, M.; Todd, B.J.; Dowdeswell, E.K.; Hogan, K.A., (eds.) Atlas of submarine glacial landforms: modern, Quaternary and ancient. London, Geological Society of London, 345-348. (Geological Society Memoir, 46).

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Abstract/Summary

Within Earth's ice sheets, fast-flowing ice streams are the principal components through which ice and sediment are discharged, accounting for c. 90% of the ice lost from the Antarctic today (Bamber et al. 2000). The processes occurring at ice-stream beds, therefore, lie at the heart of resolving how and why major ice-stream systems may change in the future. Although drill-cores and ice-surface seismic methods have been employed to survey the beds of some of West Antarctica's ice streams, studies are still hampered by the logistical and technological challenges associated with understanding a dynamic and spatially extensive interface buried beneath kilometre-thick continental ice (Larter et al. 2009). Here, a multibeam swath-bathymetric dataset acquired from the Dotson–Getz palaeo-ice-stream bed, offshore of West Antarctica, is described (Fig. 1a). In contrast to the modern ice-sheet base, the spatial coverage and quality of the marine data allow us to analyse landform evolution along an entire ice-stream bed that is both completely exposed and well preserved.

Item Type: Publication - Book Section
Digital Object Identifier (DOI): 10.1144/M46.176
Programmes: BAS Programmes > BAS Programmes 2015 > Palaeo-Environments, Ice Sheets and Climate Change
ISBN: 9781786202680
Date made live: 09 Jan 2017 11:35 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/513834

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