Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution
A long-lasting Cenozoic record (similar to 50 m.y.) of alkaline igneous rocks characterizes northern Victoria Land, Antarctica, Landscape analysis allows distinction between older volcanic and intrusive rocks with well-developed alpine topography sculptured by wet-based glaciers, and younger volcani...
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ftunivpisairis:oai:arpi.unipi.it:11568/189463 2024-04-14T08:02:49+00:00 Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution ARMIENTI, PIETRO BARONI, CARLO Armienti, Pietro Baroni, Carlo 1999 STAMPA http://hdl.handle.net/11568/189463 http://geology.gsapubs.org/content/27/7/617.full.pdf+html?sid=7f27f59c-da83-483e-9852-4a8f4572ba98 eng eng info:eu-repo/semantics/altIdentifier/wos/000081167900010 volume:27(7) issue:7 firstpage:617 lastpage:620 numberofpages:4 journal:GEOLOGY http://hdl.handle.net/11568/189463 10.1130/0091-7613(1999)027<0617:CCCIAR>2.3.CO;2 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0032717725 http://geology.gsapubs.org/content/27/7/617.full.pdf+html?sid=7f27f59c-da83-483e-9852-4a8f4572ba98 Volcanic rock landscape analysi Cenozoic Victoria Land Antarctica info:eu-repo/semantics/article 1999 ftunivpisairis 2024-03-21T18:37:46Z A long-lasting Cenozoic record (similar to 50 m.y.) of alkaline igneous rocks characterizes northern Victoria Land, Antarctica, Landscape analysis allows distinction between older volcanic and intrusive rocks with well-developed alpine topography sculptured by wet-based glaciers, and younger volcanic cones lacking these features. Many K-Ar and Rb-Sr dates testify that the erosion that formed the alpine landscape ceased between ca, 8.2 and 7.5 Ma, Since ca, 8 Ma, morphological evolution has been driven by cold-based glaciers; warm-based glaciers were no longer active. That this change affected a 300-km-long coastal area suggests a persistent cause of global significance. Glacier dynamics control landscape shaping as a function of ice thickness and temperature, which are driven by climatic conditions. In this view, a significant climatic change occurred in northern Victoria Land between 8.2 and 7.5 Ma. The perfectly preserved serrated alpine ridges, with their delicate spires, testify that no warm-based ice sheets overrode the region after 7.5 Ma and that polar conditions held sway in the Pliocene and Pleistocene Epochs. Article in Journal/Newspaper Antarc* Antarctica Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Victoria Land |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Volcanic rock landscape analysi Cenozoic Victoria Land Antarctica |
spellingShingle |
Volcanic rock landscape analysi Cenozoic Victoria Land Antarctica ARMIENTI, PIETRO BARONI, CARLO Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution |
topic_facet |
Volcanic rock landscape analysi Cenozoic Victoria Land Antarctica |
description |
A long-lasting Cenozoic record (similar to 50 m.y.) of alkaline igneous rocks characterizes northern Victoria Land, Antarctica, Landscape analysis allows distinction between older volcanic and intrusive rocks with well-developed alpine topography sculptured by wet-based glaciers, and younger volcanic cones lacking these features. Many K-Ar and Rb-Sr dates testify that the erosion that formed the alpine landscape ceased between ca, 8.2 and 7.5 Ma, Since ca, 8 Ma, morphological evolution has been driven by cold-based glaciers; warm-based glaciers were no longer active. That this change affected a 300-km-long coastal area suggests a persistent cause of global significance. Glacier dynamics control landscape shaping as a function of ice thickness and temperature, which are driven by climatic conditions. In this view, a significant climatic change occurred in northern Victoria Land between 8.2 and 7.5 Ma. The perfectly preserved serrated alpine ridges, with their delicate spires, testify that no warm-based ice sheets overrode the region after 7.5 Ma and that polar conditions held sway in the Pliocene and Pleistocene Epochs. |
author2 |
Armienti, Pietro Baroni, Carlo |
format |
Article in Journal/Newspaper |
author |
ARMIENTI, PIETRO BARONI, CARLO |
author_facet |
ARMIENTI, PIETRO BARONI, CARLO |
author_sort |
ARMIENTI, PIETRO |
title |
Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution |
title_short |
Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution |
title_full |
Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution |
title_fullStr |
Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution |
title_full_unstemmed |
Cenozoic climatic change in Antarctica recorded by volcanic activity and landscape evolution |
title_sort |
cenozoic climatic change in antarctica recorded by volcanic activity and landscape evolution |
publishDate |
1999 |
url |
http://hdl.handle.net/11568/189463 http://geology.gsapubs.org/content/27/7/617.full.pdf+html?sid=7f27f59c-da83-483e-9852-4a8f4572ba98 |
geographic |
Victoria Land |
geographic_facet |
Victoria Land |
genre |
Antarc* Antarctica Victoria Land |
genre_facet |
Antarc* Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000081167900010 volume:27(7) issue:7 firstpage:617 lastpage:620 numberofpages:4 journal:GEOLOGY http://hdl.handle.net/11568/189463 10.1130/0091-7613(1999)027<0617:CCCIAR>2.3.CO;2 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0032717725 http://geology.gsapubs.org/content/27/7/617.full.pdf+html?sid=7f27f59c-da83-483e-9852-4a8f4572ba98 |
_version_ |
1796317745720066048 |