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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: | 25 |
| Deposited By: | Geography and Environmental Studies |
| Deposited On: | 2003-08-01 |
| Last Modified: | 2004-03-31 |
| Downloads: | 0 |
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