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Submarine glacial-landform distribution across the West Greenland margin: a fjord-shelf-slope transect through the Uummannaq system (70-71 N)

Dowdeswell, J. A.; Hogan, K. A.; O Cofaigh, C.. 2016 Submarine glacial-landform distribution across the West Greenland margin: a fjord-shelf-slope transect through the Uummannaq system (70-71 N). 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, 453-460. (Geological Society Memoir, 46, 46).

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Abstract/Summary

Today, the Greenland Ice Sheet reaches the sea via a number of fast-flowing outlet glaciers that are fed by ice draining from huge interior basins (Rignot & Kanagaratnam 2006). At the Last Glacial Maximum (LGM), the ice sheet expanded to reach the continental shelf break around much of Greenland (Ó Cofaigh et al. 2013a). In the Uummannaq area at c. 70–71° N (Fig. 1a) there is now a 400 km distance between the terminus of Rink Glacier, which drains about 30 000 km2 of the ice sheet, and the shelf edge. This provides a transect from the modern glacier front, through a deep fjord system and adjacent cross-shelf trough, to the continental slope in Baffin Bay. The seafloor is now exposed along this transect and the landforms produced by past glacial activity can be examined using marine-geophysical methods. Deglaciation from the LGM was underway at the shelf edge in Uummannaq Trough by 14.8 kyr ago and from the mid-shelf by 10.9 kyr, and ice had probably retreated back into the fjord system by 9.3 kyr ago (Ó Cofaigh et al. 2013a; Roberts et al. 2013).

Item Type: Publication - Book Section
Digital Object Identifier (DOI): 10.1144/M46.150
Programmes: BAS Programmes > BAS Programmes 2015 > Palaeo-Environments, Ice Sheets and Climate Change
ISBN: 9781786202680
ISSN: 0435-4052
Date made live: 09 Jan 2017 14:17 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/515713

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