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Debris-flow deposits on the West Antarctic continental slope

Larter, R.D.; Hogan, K.A.; Hillenbrand, C.-D.; Benetti, S.. 2016 Debris-flow deposits on the West Antarctic continental slope. 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, 375-376. (Geological Society Memoir, 46).

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Abstract/Summary

Most of the West Antarctic continental margin has prograded during Neogene and Quaternary times, due largely to sediment delivery to the shelf break by ice sheets (Larter & Cunningham 1993; Nitsche et al. 2000; Cooper et al. 2008). Continental slope progradation is widely attributed to debris-flow deposition, but geophysical data that show the morphology of individual debris-flow deposits are rare. Morphologically, the continental slope can be divided into low seafloor gradient (<3°) trough-mouth fans (TMFs), developed at the mouths of some large palaeo-ice streams, and inter-fan areas with steeper slopes. We describe acoustic sub-bottom profiles and a sediment core from debris-flow deposits on Belgica Fan (Dowdeswell et al. 2008) and a sub-bottom profile of a debris-flow deposit on an inter-fan area on the Amundsen Sea continental slope (Fig. 1a).

Item Type: Publication - Book Section
Digital Object Identifier (DOI): 10.1144/M46.155
Programmes: BAS Programmes > BAS Programmes 2015 > Palaeo-Environments, Ice Sheets and Climate Change
ISBN: 9781786202680
Date made live: 09 Jan 2017 11:57 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/512287

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