Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea
We present preliminary results of the first detailed surveys of the former Larsen-A Ice Shelf, Larsen Inlet aiid southern Prince Gustav Channel. where disintegration of small ice shelvcs 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
2001
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Online Access: | http://nora.nerc.ac.uk/id/eprint/20201/ http://journals.cambridge.org/abstract_S095410200100044X |
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ftnerc:oai:nora.nerc.ac.uk:20201 2023-05-15T14:14:51+02:00 Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Del Valle, Rodolfo A. 2001 http://nora.nerc.ac.uk/id/eprint/20201/ http://journals.cambridge.org/abstract_S095410200100044X unknown Cambridge University Press Pudsey, Carol J.; Evans, Jeffrey; Domack, Eugene W.; Morris, Peter; Del Valle, Rodolfo A. 2001 Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea. Antarctic Science, 13 (3). 312-322. https://doi.org/10.1017/S095410200100044X <https://doi.org/10.1017/S095410200100044X> Publication - Article PeerReviewed 2001 ftnerc https://doi.org/10.1017/S095410200100044X 2023-02-04T19:32:43Z We present preliminary results of the first detailed surveys of the former Larsen-A Ice Shelf, Larsen Inlet aiid southern Prince Gustav Channel. where disintegration of small ice shelvcs in the past ten years has exposed the seafloor. Glacial troughs in the Larsen-A area, Larsen Inlet and Prince Gustav Channel reach 900-1 100 m in depth and have hunitnocky floors. Farther south-cast, the continental shelf is shallower (400-500 m in) 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 Princc Gustav Channel, thinning southwards. In cores, this drape corresponds to diatom-bearing marine and glacial-marine mud. In the Larsen-A area aiid Larsen Inlet, acoustically opaque sediment includes proximal ice shelfglaciomarine gravelly aiid sandy muds. aiid firm to stiff diamicts probably deposited subglacially. These arc overlain by thin (up to 1.3 in) glacioniariiie muds, locally with distinctivc diatom ooze laminae. Article in Journal/Newspaper Antarctic Science Ice Shelf Ice Shelves Weddell Sea Natural Environment Research Council: NERC Open Research Archive 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 |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
We present preliminary results of the first detailed surveys of the former Larsen-A Ice Shelf, Larsen Inlet aiid southern Prince Gustav Channel. where disintegration of small ice shelvcs in the past ten years has exposed the seafloor. Glacial troughs in the Larsen-A area, Larsen Inlet and Prince Gustav Channel reach 900-1 100 m in depth and have hunitnocky floors. Farther south-cast, the continental shelf is shallower (400-500 m in) 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 Princc Gustav Channel, thinning southwards. In cores, this drape corresponds to diatom-bearing marine and glacial-marine mud. In the Larsen-A area aiid Larsen Inlet, acoustically opaque sediment includes proximal ice shelfglaciomarine gravelly aiid sandy muds. aiid firm to stiff diamicts probably deposited subglacially. These arc overlain by thin (up to 1.3 in) glacioniariiie muds, locally with distinctivc diatom ooze laminae. |
format |
Article in Journal/Newspaper |
author |
Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Del Valle, Rodolfo A. |
spellingShingle |
Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Del Valle, Rodolfo A. Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea |
author_facet |
Pudsey, Carol J. Evans, Jeffrey Domack, Eugene W. Morris, Peter Del Valle, Rodolfo A. |
author_sort |
Pudsey, Carol J. |
title |
Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea |
title_short |
Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea |
title_full |
Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea |
title_fullStr |
Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea |
title_full_unstemmed |
Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea |
title_sort |
bathymetry and acoustic facies beneath the former larsen-a and prince gustav ice shelves, nw weddell sea |
publisher |
Cambridge University Press |
publishDate |
2001 |
url |
http://nora.nerc.ac.uk/id/eprint/20201/ http://journals.cambridge.org/abstract_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_relation |
Pudsey, Carol J.; Evans, Jeffrey; Domack, Eugene W.; Morris, Peter; Del Valle, Rodolfo A. 2001 Bathymetry and acoustic facies beneath the former Larsen-a and Prince Gustav ice shelves, NW Weddell Sea. Antarctic Science, 13 (3). 312-322. https://doi.org/10.1017/S095410200100044X <https://doi.org/10.1017/S095410200100044X> |
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_ |
1766287230624595968 |