Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica)
Abstract Geomorphological and glacial geological surveys and multiple cosmogenic nuclide analyses ( 10 Be, 26 Al, and 21 Ne) allowed us to reconstruct the chronology of variations prior to the last glacial maximum of the East Antarctic Ice Sheet (EAIS) and valley glaciers in the Terra Nova Bay regio...
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Cambridge University Press (CUP)
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crcambridgeupr:10.1016/j.yqres.2008.07.004 2024-09-15T17:47:53+00:00 Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica) Di Nicola, Luigia Strasky, Stefan Schlüchter, Christian Salvatore, Maria Cristina Akçar, Naki Kubik, Peter W. Christl, Marcus Kasper, Haino Uwe Wieler, Rainer Baroni, Carlo 2009 http://dx.doi.org/10.1016/j.yqres.2008.07.004 http://api.elsevier.com/content/article/PII:S0033589408000951?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408000951?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400014770 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 71, issue 1, page 83-92 ISSN 0033-5894 1096-0287 journal-article 2009 crcambridgeupr https://doi.org/10.1016/j.yqres.2008.07.004 2024-07-10T04:04:26Z Abstract Geomorphological and glacial geological surveys and multiple cosmogenic nuclide analyses ( 10 Be, 26 Al, and 21 Ne) allowed us to reconstruct the chronology of variations prior to the last glacial maximum of the East Antarctic Ice Sheet (EAIS) and valley glaciers in the Terra Nova Bay region. Glacially scoured coastal piedmonts with round-topped mountains occur below the highest local erosional trimline. They represent relict landscape features eroded by extensive ice overriding the whole coastal area before at least 6 Ma (pre-dating the build-up of the Mt. Melbourne volcanic field). Since then, summit surfaces were continuously exposed and well preserved under polar condition with negligible erosion rates on the order of 17 cm/Ma. Complex older drifts rest on deglaciated areas above the younger late-Pleistocene glacial drift and below the previously overridden summits. The combination of stable and radionuclide isotopes documents complex exposure histories with substantial periods of burial combined with minimal erosion. The areas below rounded summits were repeatedly exposed and buried by ice from local and outlet glaciers. The exposure ages of the older drift(s) indicate multiple Pleistocene glacial cycles, which did not significantly modify the pre-existing landscape. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Victoria Land Cambridge University Press Quaternary Research 71 1 83 92 |
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Cambridge University Press |
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English |
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Abstract Geomorphological and glacial geological surveys and multiple cosmogenic nuclide analyses ( 10 Be, 26 Al, and 21 Ne) allowed us to reconstruct the chronology of variations prior to the last glacial maximum of the East Antarctic Ice Sheet (EAIS) and valley glaciers in the Terra Nova Bay region. Glacially scoured coastal piedmonts with round-topped mountains occur below the highest local erosional trimline. They represent relict landscape features eroded by extensive ice overriding the whole coastal area before at least 6 Ma (pre-dating the build-up of the Mt. Melbourne volcanic field). Since then, summit surfaces were continuously exposed and well preserved under polar condition with negligible erosion rates on the order of 17 cm/Ma. Complex older drifts rest on deglaciated areas above the younger late-Pleistocene glacial drift and below the previously overridden summits. The combination of stable and radionuclide isotopes documents complex exposure histories with substantial periods of burial combined with minimal erosion. The areas below rounded summits were repeatedly exposed and buried by ice from local and outlet glaciers. The exposure ages of the older drift(s) indicate multiple Pleistocene glacial cycles, which did not significantly modify the pre-existing landscape. |
format |
Article in Journal/Newspaper |
author |
Di Nicola, Luigia Strasky, Stefan Schlüchter, Christian Salvatore, Maria Cristina Akçar, Naki Kubik, Peter W. Christl, Marcus Kasper, Haino Uwe Wieler, Rainer Baroni, Carlo |
spellingShingle |
Di Nicola, Luigia Strasky, Stefan Schlüchter, Christian Salvatore, Maria Cristina Akçar, Naki Kubik, Peter W. Christl, Marcus Kasper, Haino Uwe Wieler, Rainer Baroni, Carlo Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica) |
author_facet |
Di Nicola, Luigia Strasky, Stefan Schlüchter, Christian Salvatore, Maria Cristina Akçar, Naki Kubik, Peter W. Christl, Marcus Kasper, Haino Uwe Wieler, Rainer Baroni, Carlo |
author_sort |
Di Nicola, Luigia |
title |
Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica) |
title_short |
Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica) |
title_full |
Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica) |
title_fullStr |
Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica) |
title_full_unstemmed |
Multiple cosmogenic nuclides document complex Pleistocene exposure history of glacial drifts in Terra Nova Bay (northern Victoria Land, Antarctica) |
title_sort |
multiple cosmogenic nuclides document complex pleistocene exposure history of glacial drifts in terra nova bay (northern victoria land, antarctica) |
publisher |
Cambridge University Press (CUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1016/j.yqres.2008.07.004 http://api.elsevier.com/content/article/PII:S0033589408000951?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408000951?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400014770 |
genre |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
op_source |
Quaternary Research volume 71, issue 1, page 83-92 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2008.07.004 |
container_title |
Quaternary Research |
container_volume |
71 |
container_issue |
1 |
container_start_page |
83 |
op_container_end_page |
92 |
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1810497581033193472 |