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Submarine glacial landforms on the cold East Antarctic margin

Citation

O'Brien, PE and Beaman, R and De Santis, L and Domack, EW and Escutia, C and Harris, PT and Leventer, A and McMullen, K and Post, A and Quilty, PG and Shevenell, AE and Batchelor, CL, Submarine glacial landforms on the cold East Antarctic margin, Geological Society of London. Memoirs, 46, (1) pp. 501-508. ISSN 0435-4052 (2016) [Non Refereed Article]


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DOI: doi:10.1144/M46.172

Abstract

The East Antarctic continental margin, which extends from the Weddell Sea to the Ross Sea (Fig. 1h), surrounds the largest and oldest ice mass on Earth; however, it has only been studied at a few locations because of its remoteness and persistent sea ice. The shelf is 100150 km wide over most of its length but broadens where major crustal structures intersect it, such as in Prydz Bay (Fig. 1a) where the shelf is 200300 km wide. This paper reviews what is known presently about the geomorphology of the best-studied sectors of the East Antarctic margin: the deep re-entrant of Prydz Bay and the narrower shelves of George V and Mac.Robertson Land (Fig. 1h). Only a small proportion of the East Antarctica shelf has been surveyed with multibeam bathymetry, so this review is also dependent on compilations of single-beam bathymetry, seismic-reflection profiles and side-scan sonar data. In particular, we use George V Digital Elevation Model (GVDEM, Beaman et al. 2011) and International Bathymetric Chart of the Southern Ocean (IBCSO; Arndt et al. 2013). The slope has been more widely studied, with large amounts of seismic-reflection data available (e.g. Kuvaas & Leitchenkov 1992; Escutia et al. 2000; Solli et al. 2007; Close et al. 2007).

Item Details

Item Type:Non Refereed Article
Keywords:submarine glacial landforms, east Antarctic, continental margin, geomorphology
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine Geoscience
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Antarctic and Sub-Antarctic Environments
Author:Quilty, PG (Dr Pat Quilty)
ID Code:117031
Year Published:2016
Deposited By:Geography and Spatial Science
Deposited On:2017-05-29
Last Modified:2017-05-29
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