The Last Glaciation in central Magellan-Strait, southernmost Chile
Glacial landforms and drift stratigraphy in central Magellan Strait, southernmost Chile, document repeated fluctuations during the last glacial cycle of outlet lobes from an ice cap centred over the southern Andes. The lobes developed comparatively low-gradient profiles because of low basal shear st...
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Online Access: | http://hdl.handle.net/1893/17216 https://doi.org/10.1006/qres.1995.1058 http://dspace.stir.ac.uk/bitstream/1893/17216/1/Clapperton%20et%20al%20QR%201995.pdf |
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ftunivstirling:oai:dspace.stir.ac.uk:1893/17216 2023-05-15T16:38:16+02:00 The Last Glaciation in central Magellan-Strait, southernmost Chile Clapperton, Chalmers M Sugden, David E Kaufman, Darrell McCulloch, Robert University of Aberdeen University of Edinburgh Utah State University Biological and Environmental Sciences orcid:0000-0001-5542-3703 1995-09 application/pdf http://hdl.handle.net/1893/17216 https://doi.org/10.1006/qres.1995.1058 http://dspace.stir.ac.uk/bitstream/1893/17216/1/Clapperton%20et%20al%20QR%201995.pdf en eng Elsevier Clapperton CM, Sugden DE, Kaufman D & McCulloch R (1995) The Last Glaciation in central Magellan-Strait, southernmost Chile. Quaternary Research, 44 (2), pp. 133-148. https://doi.org/10.1006/qres.1995.1058 http://hdl.handle.net/1893/17216 doi:10.1006/qres.1995.1058 WOS:A1995TA59800001 2-s2.0-0029473906 716441 http://dspace.stir.ac.uk/bitstream/1893/17216/1/Clapperton%20et%20al%20QR%201995.pdf The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. http://www.rioxx.net/licenses/under-embargo-all-rights-reserved 2999-12-31 [Clapperton et al QR 1995.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work. Journal Article VoR - Version of Record 1995 ftunivstirling https://doi.org/10.1006/qres.1995.1058 2022-06-13T18:44:25Z Glacial landforms and drift stratigraphy in central Magellan Strait, southernmost Chile, document repeated fluctuations during the last glacial cycle of outlet lobes from an ice cap centred over the southern Andes. The lobes developed comparatively low-gradient profiles because of low basal shear stresses over soft deformable beds and this made them sensitive to even small-scale changes in mass balance. Such low profiles and rapid calving in deep proglacial lakes during deglaciation may have made the Magellan ice lobe particularly responsive to climatic fluctuations during the last glacial cycle, and to readvance and retreat over considerable distances. Study of the glacial landforms and drift stratigraphy has led to the identification of at least five glacier advances to limits at and south of the Segunda Angostura. Fragments of mollusc shells contained in the basal till indicate marine incursions between some advances, thus documenting extensive deglaciation. A partial chronology based on amino acid studies and radiocarbon dating suggests that five of these advances occurred during the last glacial cycle. The most extensive advances may have culminated during substages of marine isotope stage 5 (substage 5b or 5d) and / or during stage 4. Slightly less extensive advances occurred between ca. 28,000 and 14,000 yr B.P. Article in Journal/Newspaper Ice cap University of Stirling: Stirling Digital Research Repository Quaternary Research 44 2 133 148 |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
description |
Glacial landforms and drift stratigraphy in central Magellan Strait, southernmost Chile, document repeated fluctuations during the last glacial cycle of outlet lobes from an ice cap centred over the southern Andes. The lobes developed comparatively low-gradient profiles because of low basal shear stresses over soft deformable beds and this made them sensitive to even small-scale changes in mass balance. Such low profiles and rapid calving in deep proglacial lakes during deglaciation may have made the Magellan ice lobe particularly responsive to climatic fluctuations during the last glacial cycle, and to readvance and retreat over considerable distances. Study of the glacial landforms and drift stratigraphy has led to the identification of at least five glacier advances to limits at and south of the Segunda Angostura. Fragments of mollusc shells contained in the basal till indicate marine incursions between some advances, thus documenting extensive deglaciation. A partial chronology based on amino acid studies and radiocarbon dating suggests that five of these advances occurred during the last glacial cycle. The most extensive advances may have culminated during substages of marine isotope stage 5 (substage 5b or 5d) and / or during stage 4. Slightly less extensive advances occurred between ca. 28,000 and 14,000 yr B.P. |
author2 |
University of Aberdeen University of Edinburgh Utah State University Biological and Environmental Sciences orcid:0000-0001-5542-3703 |
format |
Article in Journal/Newspaper |
author |
Clapperton, Chalmers M Sugden, David E Kaufman, Darrell McCulloch, Robert |
spellingShingle |
Clapperton, Chalmers M Sugden, David E Kaufman, Darrell McCulloch, Robert The Last Glaciation in central Magellan-Strait, southernmost Chile |
author_facet |
Clapperton, Chalmers M Sugden, David E Kaufman, Darrell McCulloch, Robert |
author_sort |
Clapperton, Chalmers M |
title |
The Last Glaciation in central Magellan-Strait, southernmost Chile |
title_short |
The Last Glaciation in central Magellan-Strait, southernmost Chile |
title_full |
The Last Glaciation in central Magellan-Strait, southernmost Chile |
title_fullStr |
The Last Glaciation in central Magellan-Strait, southernmost Chile |
title_full_unstemmed |
The Last Glaciation in central Magellan-Strait, southernmost Chile |
title_sort |
last glaciation in central magellan-strait, southernmost chile |
publisher |
Elsevier |
publishDate |
1995 |
url |
http://hdl.handle.net/1893/17216 https://doi.org/10.1006/qres.1995.1058 http://dspace.stir.ac.uk/bitstream/1893/17216/1/Clapperton%20et%20al%20QR%201995.pdf |
genre |
Ice cap |
genre_facet |
Ice cap |
op_relation |
Clapperton CM, Sugden DE, Kaufman D & McCulloch R (1995) The Last Glaciation in central Magellan-Strait, southernmost Chile. Quaternary Research, 44 (2), pp. 133-148. https://doi.org/10.1006/qres.1995.1058 http://hdl.handle.net/1893/17216 doi:10.1006/qres.1995.1058 WOS:A1995TA59800001 2-s2.0-0029473906 716441 http://dspace.stir.ac.uk/bitstream/1893/17216/1/Clapperton%20et%20al%20QR%201995.pdf |
op_rights |
The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. http://www.rioxx.net/licenses/under-embargo-all-rights-reserved 2999-12-31 [Clapperton et al QR 1995.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work. |
op_doi |
https://doi.org/10.1006/qres.1995.1058 |
container_title |
Quaternary Research |
container_volume |
44 |
container_issue |
2 |
container_start_page |
133 |
op_container_end_page |
148 |
_version_ |
1766028542213095424 |