eCite Digital Repository

Seafloor morphology and acoustic facies of the George V Land shelf

Citation

Beaman, RJ and Harris, PT, Seafloor morphology and acoustic facies of the George V Land shelf, Deep Sea Research Part II: Topical Studies in Oceanography, 50, (8-9) pp. 1343-1355. ISSN 0967-0645 (2003) [Refereed Article]

DOI: doi:10.1016/S0967-0645(03)00071-7

Abstract

To study the seafloor morphology on the George V Land shelf, East Antarctica, over 2000 km of high-frequency 3.5-27 kHz, echo-sounder data were collected between February and March 2000. The shelf can be divided into four acoustic facies: (a) Type IA-2 seabed is ice-keel turbate found on mid- to outer-shelf banks on seaftoor less than 500 m deep; (b) Type IB seabed is siliceous mud and diatom ooze drift, drape and fill deposits within the George V Basin between 750 and 850 m depth; (c) Type IIB seabed is smooth diamicton below 500 m depth, and occasionally has low-relief megaflutes or ridge and swale features; (d) Type IIIC seabed is high relief ridges and canyons from the coast to the deepest part of the George V Basin. The acoustic facies are explained in terms of glacial and oceanographic influences on the shelf since the Last Glacial Maximum. © 2003 Elsevier Science Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical Oceanography
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Environment not elsewhere classified
Author:Beaman, RJ (Mr Robin Beaman)
Author:Harris, PT (Dr Peter Harris)
ID Code:28235
Year Published:2003
Web of Science® Times Cited:23
Deposited By:Geography and Environmental Studies
Deposited On:2003-08-01
Last Modified:2004-03-31
Downloads:0

Repository Staff Only: item control page