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Chapter (in Edited Book) ()

Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland

Citation
Dove D, Finlayson A, Bradwell T, Howe JA & Arosio R (2016) Deglacial landform assemblage records fast ice-flow and retreat, Inner Hebrides, Scotland. In: Dowdeswell JA, Canals M, Jakobsson M, Todd BJ, Dowdeswell EK, Hogan KA (ed.). Atlas of Submarine Glacial Landforms: Modern, Quaternary and Ancient. Geological Society Memoir, 46, London: Geological Society of London, pp. 135-138.

Abstract
First paragraph: High-resolution bathymetric data have been central to recent advances in the understanding of past dynamics of the former British–Irish Ice Sheet (BIIS). As approximately two-thirds of the former BIIS was probably marine-based during the Last Glacial Maximum (LGM) (c.29–23 ka), geomorphic observations of the seabed are required increasingly to understand the extent, pattern and timing of past glaciation. Until recently, glacial reconstructions for the Inner Hebrides, offshore of western Scotland, have been based primarily on terrestrial observations. Previous workers have proposed generalized reconstructions in which the Inner Hebrides are located within a significant former ice-sheet flow pathway that drained the western Scottish sector of the BIIS, feeding the Barra Fan during the LGM and earlier glaciations (Fig. 1). Results from numerical ice-sheet modelling suggest that former ice-flow velocities within the region were on the order of hundreds to thousands of metres per year, but yield further insight by demonstrating how dynamic binge/purge cycles may have affected ice-sheet mass balance over time (Hubbardet al.2009). Following the LGM, ice-sheet retreat through the area is estimated to have been in the order of 20 m per year (Clarket al.2012). Here we present swath-bathymetric data from the Inner Hebrides that providein situconstraints on ice-sheet flow and subsequent retreat dynamics from within this important sector of the BIIS.

StatusPublished
EditorDowdeswell JA, Canals M, Jakobsson M, Todd BJ, Dowdeswell EK, Hogan KA
AuthorsDove Dayton, Finlayson Andrew, Bradwell Tom, Howe John A, Arosio Riccardo
Title of seriesGeological Society Memoir
Number in series46
Publication date2016
URLhttp://mem.lyellcollection.org/content/46/1/135
PublisherGeological Society of London
Place of publicationLondon
ISSN of series 0435-4052
ISBN 9781786202680
LanguageEnglish
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