The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica
A large submarine slide ^ the Gebra Slide ^ has been discovered on the continental margin of Trinity Peninsula, Central Bransfield Basin, Antarctic Peninsula. The slide scar is clearly expressed in the bathymetry and is cut into the toe of the glacial-period slope-prograding strata on the lower cont...
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ftunivgent:oai:archive.ugent.be:209386 2023-10-01T03:50:38+02:00 The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica Imbo, Yannick De Batist, Marc Canals, M Prieto, MJ Baraza, J 2003 https://biblio.ugent.be/publication/209386 http://hdl.handle.net/1854/LU-209386 eng eng https://biblio.ugent.be/publication/209386 http://hdl.handle.net/1854/LU-209386 MARINE GEOLOGY ISSN: 0025-3227 Earth and Environmental Sciences Gebra Slide Antarctic Peninsula glacial continental margin submarine slope stability debris flow journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2003 ftunivgent 2023-09-06T22:30:53Z A large submarine slide ^ the Gebra Slide ^ has been discovered on the continental margin of Trinity Peninsula, Central Bransfield Basin, Antarctic Peninsula. The slide scar is clearly expressed in the bathymetry and is cut into the toe of the glacial-period slope-prograding strata on the lower continental slope. Seismic data give evidence of an associated debris-flow deposit embedded in the interglacial-period basin-fill strata of the basin floor. The total volume of sediment involved in the mass movement is about 20 km3. Indirect dating of the mass-wasting event, based on seismic^stratigraphic relationships of the slide scar and associated debris-flow deposit with underlying glacial-period slope units and the overlying interglacial-period basin-floor units, suggests that it took place at the transition between the last glacial period and the present-day interglacial. The initiation of the Gebra Slide is attributed to a combination of several factors, such as high sedimentation rates during the last glacial period, the unloading effect of a retreating ice sheet during deglaciation, pre-existing tectonic fabric and high seismicity in the area. This is the first recent submarine slide of this size identified on the glacial, continental margins of Antarctica. In morphology and general characteristics it is quite similar to the well-known large-scale submarine slides from the northern hemisphere glacial margins, although it is smaller. Its most striking characteristic is its lower-slope position (at 1500^2000 m of water depth), which remains up to now difficult to explain. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ghent University Academic Bibliography Antarctic Antarctic Peninsula The Toe ENVELOPE(-59.167,-59.167,-62.333,-62.333) Trinity Peninsula ENVELOPE(-58.000,-58.000,-63.500,-63.500) |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences Gebra Slide Antarctic Peninsula glacial continental margin submarine slope stability debris flow |
spellingShingle |
Earth and Environmental Sciences Gebra Slide Antarctic Peninsula glacial continental margin submarine slope stability debris flow Imbo, Yannick De Batist, Marc Canals, M Prieto, MJ Baraza, J The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica |
topic_facet |
Earth and Environmental Sciences Gebra Slide Antarctic Peninsula glacial continental margin submarine slope stability debris flow |
description |
A large submarine slide ^ the Gebra Slide ^ has been discovered on the continental margin of Trinity Peninsula, Central Bransfield Basin, Antarctic Peninsula. The slide scar is clearly expressed in the bathymetry and is cut into the toe of the glacial-period slope-prograding strata on the lower continental slope. Seismic data give evidence of an associated debris-flow deposit embedded in the interglacial-period basin-fill strata of the basin floor. The total volume of sediment involved in the mass movement is about 20 km3. Indirect dating of the mass-wasting event, based on seismic^stratigraphic relationships of the slide scar and associated debris-flow deposit with underlying glacial-period slope units and the overlying interglacial-period basin-floor units, suggests that it took place at the transition between the last glacial period and the present-day interglacial. The initiation of the Gebra Slide is attributed to a combination of several factors, such as high sedimentation rates during the last glacial period, the unloading effect of a retreating ice sheet during deglaciation, pre-existing tectonic fabric and high seismicity in the area. This is the first recent submarine slide of this size identified on the glacial, continental margins of Antarctica. In morphology and general characteristics it is quite similar to the well-known large-scale submarine slides from the northern hemisphere glacial margins, although it is smaller. Its most striking characteristic is its lower-slope position (at 1500^2000 m of water depth), which remains up to now difficult to explain. |
format |
Article in Journal/Newspaper |
author |
Imbo, Yannick De Batist, Marc Canals, M Prieto, MJ Baraza, J |
author_facet |
Imbo, Yannick De Batist, Marc Canals, M Prieto, MJ Baraza, J |
author_sort |
Imbo, Yannick |
title |
The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica |
title_short |
The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica |
title_full |
The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica |
title_fullStr |
The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica |
title_full_unstemmed |
The Gebra Slide: a submarine slide on the Trinity Peninsula Margin, Antarctica |
title_sort |
gebra slide: a submarine slide on the trinity peninsula margin, antarctica |
publishDate |
2003 |
url |
https://biblio.ugent.be/publication/209386 http://hdl.handle.net/1854/LU-209386 |
long_lat |
ENVELOPE(-59.167,-59.167,-62.333,-62.333) ENVELOPE(-58.000,-58.000,-63.500,-63.500) |
geographic |
Antarctic Antarctic Peninsula The Toe Trinity Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula The Toe Trinity Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet |
op_source |
MARINE GEOLOGY ISSN: 0025-3227 |
op_relation |
https://biblio.ugent.be/publication/209386 http://hdl.handle.net/1854/LU-209386 |
_version_ |
1778525716273430528 |