Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea
We present preliminary results of the first detailied surveys of the former Larsen-A Ice Shelf, Larsen Inlet and southern Prince Gustav Channel, where disintegration of small ice shelves in the past ten years has exposed the seafloor. Glacial troughs in the Larsen-A area, Larsen Inlet and Prince Gus...
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Cambridge University Press (CUP)
2001
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Online Access: | http://dx.doi.org/10.1017/s095410200100044x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410200100044X |
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crcambridgeupr:10.1017/s095410200100044x 2024-03-03T08:39:26+00:00 Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Valle, Rodolfo A. Del 2001 http://dx.doi.org/10.1017/s095410200100044x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410200100044X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 13, issue 3, page 312-322 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2001 crcambridgeupr https://doi.org/10.1017/s095410200100044x 2024-02-08T08:36:23Z We present preliminary results of the first detailied surveys of the former Larsen-A Ice Shelf, Larsen Inlet and southern Prince Gustav Channel, where disintegration of small ice shelves in the past ten years has exposed the seafloor. Glacial troughs in the Larsen-A area, Larsen Inlet and Prince Gustav Channel reach 900–1100 m depth and have hummocky floors. Farther south-east, the continental shelf is shallower (400–500 m) and its surface is fluted to smooth, with the density of iceberg furrowing increasing towards the shelf edge. Acoustic profiles show a drape of transparent sediment 4–8 m thick in Prince Gustav Channel, thinning southwards. In cores, this drape corresponds to diatom-bearing marine and glacial-marine mud. In the Larsen-A area and Larsen Inlet, acoustically opaque sediment includes proximal ice shelf glaciomarine gravelly and sandy muds, and firm to stiff diamicts probably deposited subglacilly. These are overlain by thin (up to 1.3 m) glaciomarine muds, locally with distinctive diatom ooze laminae. Article in Journal/Newspaper Antarctic Science Ice Shelf Ice Shelves Weddell Sea Cambridge University Press Weddell Sea Weddell Prince Gustav Channel ENVELOPE(-58.250,-58.250,-63.833,-63.833) Larsen Inlet ENVELOPE(-59.500,-59.500,-64.333,-64.333) Antarctic Science 13 3 312 322 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Valle, Rodolfo A. Del Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
We present preliminary results of the first detailied surveys of the former Larsen-A Ice Shelf, Larsen Inlet and southern Prince Gustav Channel, where disintegration of small ice shelves in the past ten years has exposed the seafloor. Glacial troughs in the Larsen-A area, Larsen Inlet and Prince Gustav Channel reach 900–1100 m depth and have hummocky floors. Farther south-east, the continental shelf is shallower (400–500 m) and its surface is fluted to smooth, with the density of iceberg furrowing increasing towards the shelf edge. Acoustic profiles show a drape of transparent sediment 4–8 m thick in Prince Gustav Channel, thinning southwards. In cores, this drape corresponds to diatom-bearing marine and glacial-marine mud. In the Larsen-A area and Larsen Inlet, acoustically opaque sediment includes proximal ice shelf glaciomarine gravelly and sandy muds, and firm to stiff diamicts probably deposited subglacilly. These are overlain by thin (up to 1.3 m) glaciomarine muds, locally with distinctive diatom ooze laminae. |
format |
Article in Journal/Newspaper |
author |
Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Valle, Rodolfo A. Del |
author_facet |
Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Valle, Rodolfo A. Del |
author_sort |
Pudsey, Carol J. |
title |
Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea |
title_short |
Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea |
title_full |
Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea |
title_fullStr |
Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea |
title_full_unstemmed |
Bathymetry and acoustic facies beneath the former Larsen-A and Prince Gustav ice shelves, north-west Weddell Sea |
title_sort |
bathymetry and acoustic facies beneath the former larsen-a and prince gustav ice shelves, north-west weddell sea |
publisher |
Cambridge University Press (CUP) |
publishDate |
2001 |
url |
http://dx.doi.org/10.1017/s095410200100044x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S095410200100044X |
long_lat |
ENVELOPE(-58.250,-58.250,-63.833,-63.833) ENVELOPE(-59.500,-59.500,-64.333,-64.333) |
geographic |
Weddell Sea Weddell Prince Gustav Channel Larsen Inlet |
geographic_facet |
Weddell Sea Weddell Prince Gustav Channel Larsen Inlet |
genre |
Antarctic Science Ice Shelf Ice Shelves Weddell Sea |
genre_facet |
Antarctic Science Ice Shelf Ice Shelves Weddell Sea |
op_source |
Antarctic Science volume 13, issue 3, page 312-322 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s095410200100044x |
container_title |
Antarctic Science |
container_volume |
13 |
container_issue |
3 |
container_start_page |
312 |
op_container_end_page |
322 |
_version_ |
1792494977290338304 |