Seafloor morphology and acoustic facies of the George V Land shelf
To study the seafloor morphology on the George V Land shelf, East Antarctica, over 2000km 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 oute...
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ftjamescook:oai:researchonline.jcu.edu.au:1038 2024-06-09T07:41:09+00:00 Seafloor morphology and acoustic facies of the George V Land shelf Beaman, Robin J Harris, Peter T 2003 application/pdf https://researchonline.jcu.edu.au/1038/1/AcousticFaciesGeorgeVShelf_Beaman2003.pdf unknown https://researchonline.jcu.edu.au/1038/ https://researchonline.jcu.edu.au/1038/1/AcousticFaciesGeorgeVShelf_Beaman2003.pdf Beaman, Robin J, and Harris, Peter T (2003) 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. restricted Article PeerReviewed 2003 ftjamescook 2024-05-14T23:31:55Z To study the seafloor morphology on the George V Land shelf, East Antarctica, over 2000km 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 seafloor less than 500m deep; (b) Type IB seabed is siliceous mud and diatom ooze drift, drape and fill deposits within the George V Basin between 750 and 850m depth; (c) Type IIB seabed is smooth diamicton below 500m depth, and occasionally has lowrelief 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. Article in Journal/Newspaper Antarc* Antarctica East Antarctica George V Land James Cook University, Australia: ResearchOnline@JCU East Antarctica George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) |
institution |
Open Polar |
collection |
James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
To study the seafloor morphology on the George V Land shelf, East Antarctica, over 2000km 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 seafloor less than 500m deep; (b) Type IB seabed is siliceous mud and diatom ooze drift, drape and fill deposits within the George V Basin between 750 and 850m depth; (c) Type IIB seabed is smooth diamicton below 500m depth, and occasionally has lowrelief 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. |
format |
Article in Journal/Newspaper |
author |
Beaman, Robin J Harris, Peter T |
spellingShingle |
Beaman, Robin J Harris, Peter T Seafloor morphology and acoustic facies of the George V Land shelf |
author_facet |
Beaman, Robin J Harris, Peter T |
author_sort |
Beaman, Robin J |
title |
Seafloor morphology and acoustic facies of the George V Land shelf |
title_short |
Seafloor morphology and acoustic facies of the George V Land shelf |
title_full |
Seafloor morphology and acoustic facies of the George V Land shelf |
title_fullStr |
Seafloor morphology and acoustic facies of the George V Land shelf |
title_full_unstemmed |
Seafloor morphology and acoustic facies of the George V Land shelf |
title_sort |
seafloor morphology and acoustic facies of the george v land shelf |
publishDate |
2003 |
url |
https://researchonline.jcu.edu.au/1038/1/AcousticFaciesGeorgeVShelf_Beaman2003.pdf |
long_lat |
ENVELOPE(148.000,148.000,-68.500,-68.500) |
geographic |
East Antarctica George V Land |
geographic_facet |
East Antarctica George V Land |
genre |
Antarc* Antarctica East Antarctica George V Land |
genre_facet |
Antarc* Antarctica East Antarctica George V Land |
op_relation |
https://researchonline.jcu.edu.au/1038/ https://researchonline.jcu.edu.au/1038/1/AcousticFaciesGeorgeVShelf_Beaman2003.pdf Beaman, Robin J, and Harris, Peter T (2003) 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. |
op_rights |
restricted |
_version_ |
1801369593643532288 |