Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages.
Antarctica has played an integral role in the global climate system since the Early Oligocene. It comprises a complex system of glacial bodies, each characterized by its own history, dynamics, reaction capability and time-response to environmental and climatic stresses. Our study focuses on northern...
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Australian and New Zealand Geomorphology Group and International Association of Geomorphologists
2009
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ftunivpisairis:oai:arpi.unipi.it:11568/135648 2024-04-14T08:04:04+00:00 Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages. BARONI, CARLO SALVATORE, MARIA CRISTINA DI NICOLA L. STRASKY S. SCHLÜCHTER C. AKÇAR N. KUBIK P. W. WIELER R. Baroni, Carlo DI NICOLA, L. Strasky, S. Salvatore, MARIA CRISTINA Schlüchter, C. Akçar, N. Kubik, P. W. Wieler, R. 2009 http://hdl.handle.net/11568/135648 http://trove.nla.gov.au/version/38753305 eng eng Australian and New Zealand Geomorphology Group and International Association of Geomorphologists country:AUS place:Melbourne info:eu-repo/semantics/altIdentifier/isbn/1877040746 ispartofbook:Ancient Landscape – Modern Perspectives, Conference Abstracts 7th International Conference on Geomorphology (ANZIAG) http://hdl.handle.net/11568/135648 http://trove.nla.gov.au/version/38753305 Geomorphology Glacial geology Surface Exposure Dating multiple cosmogenic nuclide paleoclimatic evolution East Antarctic Ice Sheet info:eu-repo/semantics/conferenceObject 2009 ftunivpisairis 2024-03-21T18:30:33Z Antarctica has played an integral role in the global climate system since the Early Oligocene. It comprises a complex system of glacial bodies, each characterized by its own history, dynamics, reaction capability and time-response to environmental and climatic stresses. Our study focuses on northern Victoria Land (NVL), where an articulated glacial system behaves with its own dynamics, independently from the East Antarctic Ice Sheet (EAIS). A regional landscape analysis, based on glacial geologic and geomorphologic surveys and mapping, was conducted to investigate NVL glacial history in order to assess the relationship between EAIS and NVL glacial system. Through detailed field traverses in NVL, we identified and classified several geomorphologic units and glacial drifts offering valuable archives of past environmental changes and glacial advances. The polar environment endured in NVL since at least 7.5 – 8 Ma (and even before when considering the EAIS region). In such a highly conservative setting, surface exposure dating (SED) has proven to be highly valuable in order to establish a precise chronology of the landscape features. Through field observations in ice- free areas at the borders of outlet, valley and local glaciers, as well as in nunataks at the margin of the EAIS are combined with cosmogenic data from erosional surfaces and erratic boulders. Our data indicate several ice fluctuations, providing valuable insights into the paleoclimatic evolution of the study area. The employment of multiple cosmogenic nuclides (10Be, 26Al, 21Ne) constrains denudation rates which testify persistent climate stability with cold and dry condition. Complex glacial dynamics are unraveled in the coastal area as well as at the internal margin of EAIS. Our results provide valuable insights into the paleoclimatic evolution of the investigated area, allowing the reconstruction of the major global events recorded in NVL and the identification of significant relationships with other Antarctic regions. Conference Object Antarc* Antarctic Antarctica Ice Sheet Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic East Antarctic Ice Sheet Victoria Land |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Geomorphology Glacial geology Surface Exposure Dating multiple cosmogenic nuclide paleoclimatic evolution East Antarctic Ice Sheet |
spellingShingle |
Geomorphology Glacial geology Surface Exposure Dating multiple cosmogenic nuclide paleoclimatic evolution East Antarctic Ice Sheet BARONI, CARLO SALVATORE, MARIA CRISTINA DI NICOLA L. STRASKY S. SCHLÜCHTER C. AKÇAR N. KUBIK P. W. WIELER R. Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages. |
topic_facet |
Geomorphology Glacial geology Surface Exposure Dating multiple cosmogenic nuclide paleoclimatic evolution East Antarctic Ice Sheet |
description |
Antarctica has played an integral role in the global climate system since the Early Oligocene. It comprises a complex system of glacial bodies, each characterized by its own history, dynamics, reaction capability and time-response to environmental and climatic stresses. Our study focuses on northern Victoria Land (NVL), where an articulated glacial system behaves with its own dynamics, independently from the East Antarctic Ice Sheet (EAIS). A regional landscape analysis, based on glacial geologic and geomorphologic surveys and mapping, was conducted to investigate NVL glacial history in order to assess the relationship between EAIS and NVL glacial system. Through detailed field traverses in NVL, we identified and classified several geomorphologic units and glacial drifts offering valuable archives of past environmental changes and glacial advances. The polar environment endured in NVL since at least 7.5 – 8 Ma (and even before when considering the EAIS region). In such a highly conservative setting, surface exposure dating (SED) has proven to be highly valuable in order to establish a precise chronology of the landscape features. Through field observations in ice- free areas at the borders of outlet, valley and local glaciers, as well as in nunataks at the margin of the EAIS are combined with cosmogenic data from erosional surfaces and erratic boulders. Our data indicate several ice fluctuations, providing valuable insights into the paleoclimatic evolution of the study area. The employment of multiple cosmogenic nuclides (10Be, 26Al, 21Ne) constrains denudation rates which testify persistent climate stability with cold and dry condition. Complex glacial dynamics are unraveled in the coastal area as well as at the internal margin of EAIS. Our results provide valuable insights into the paleoclimatic evolution of the investigated area, allowing the reconstruction of the major global events recorded in NVL and the identification of significant relationships with other Antarctic regions. |
author2 |
Baroni, Carlo DI NICOLA, L. Strasky, S. Salvatore, MARIA CRISTINA Schlüchter, C. Akçar, N. Kubik, P. W. Wieler, R. |
format |
Conference Object |
author |
BARONI, CARLO SALVATORE, MARIA CRISTINA DI NICOLA L. STRASKY S. SCHLÜCHTER C. AKÇAR N. KUBIK P. W. WIELER R. |
author_facet |
BARONI, CARLO SALVATORE, MARIA CRISTINA DI NICOLA L. STRASKY S. SCHLÜCHTER C. AKÇAR N. KUBIK P. W. WIELER R. |
author_sort |
BARONI, CARLO |
title |
Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages. |
title_short |
Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages. |
title_full |
Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages. |
title_fullStr |
Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages. |
title_full_unstemmed |
Cenozoic glacial history of northern Victoria Land (Antarctica): geomorphologic evidences and surface exposure ages. |
title_sort |
cenozoic glacial history of northern victoria land (antarctica): geomorphologic evidences and surface exposure ages. |
publisher |
Australian and New Zealand Geomorphology Group and International Association of Geomorphologists |
publishDate |
2009 |
url |
http://hdl.handle.net/11568/135648 http://trove.nla.gov.au/version/38753305 |
geographic |
Antarctic East Antarctic Ice Sheet Victoria Land |
geographic_facet |
Antarctic East Antarctic Ice Sheet Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/isbn/1877040746 ispartofbook:Ancient Landscape – Modern Perspectives, Conference Abstracts 7th International Conference on Geomorphology (ANZIAG) http://hdl.handle.net/11568/135648 http://trove.nla.gov.au/version/38753305 |
_version_ |
1796300440188485632 |