First Cenozoic glaciers in West Antarctica
Abstract: One of the most significant global climatic events in the Cenozoic was the transi− tion from greenhouse to icehouse conditions in Antarctica. Tectonic evolution of the region and gradual cooling at the end of Eocene led to the first appearance of ice sheets at the Eocene/Oligocene boundary...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.630.7803 2023-05-15T13:32:12+02:00 First Cenozoic glaciers in West Antarctica Krzysztof Birkenmajer Andrzej Gaździcki Krzysztof P. Krajewski Instytut Nauk Geologicznych Uniwersytet Wrocławski Pl. Maksa Borna Centrum Badań Ekologicznych Polska Akademia Nauk Ul. Konopnickiej The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.7803 http://www.polar.pan.pl/ppr26/ppr26-003.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.7803 http://www.polar.pan.pl/ppr26/ppr26-003.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.polar.pan.pl/ppr26/ppr26-003.pdf Key words Antarctica King George Island Eocene mountain glaciers text 2005 ftciteseerx 2016-01-08T15:28:32Z Abstract: One of the most significant global climatic events in the Cenozoic was the transi− tion from greenhouse to icehouse conditions in Antarctica. Tectonic evolution of the region and gradual cooling at the end of Eocene led to the first appearance of ice sheets at the Eocene/Oligocene boundary (ca. 34 Ma). Here we report geological record of mountain gla− ciers that preceded major ice sheet formation in Antarctica. A terrestrial, valley−type tillite up to 65 metres thick was revealed between two basaltic lava sequences in the Eocene– Oligocene Point Thomas Formation at Hervé Cove – Breccia Crag in Admiralty Bay, King George Island, South Shetland Islands. K−Ar dating of the lavas suggests the age of the gla− ciation at 45–41 Ma (Middle Eocene). It is the oldest Cenozoic record of alpine glaciers in West Antarctica, providing insight into the onset of glaciation of the Antarctic Peninsula and South Shetland Islands. Text Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet King George Island South Shetland Islands West Antarctica Unknown Admiralty Bay Antarctic Antarctic Peninsula Breccia Crag ENVELOPE(-58.542,-58.542,-62.175,-62.175) Hervé Cove ENVELOPE(-58.534,-58.534,-62.179,-62.179) King George Island Point Thomas ENVELOPE(-58.500,-58.500,-62.167,-62.167) South Shetland Islands The Antarctic West Antarctica |
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ftciteseerx |
language |
English |
topic |
Key words Antarctica King George Island Eocene mountain glaciers |
spellingShingle |
Key words Antarctica King George Island Eocene mountain glaciers Krzysztof Birkenmajer Andrzej Gaździcki Krzysztof P. Krajewski Instytut Nauk Geologicznych Uniwersytet Wrocławski Pl. Maksa Borna Centrum Badań Ekologicznych Polska Akademia Nauk Ul. Konopnickiej First Cenozoic glaciers in West Antarctica |
topic_facet |
Key words Antarctica King George Island Eocene mountain glaciers |
description |
Abstract: One of the most significant global climatic events in the Cenozoic was the transi− tion from greenhouse to icehouse conditions in Antarctica. Tectonic evolution of the region and gradual cooling at the end of Eocene led to the first appearance of ice sheets at the Eocene/Oligocene boundary (ca. 34 Ma). Here we report geological record of mountain gla− ciers that preceded major ice sheet formation in Antarctica. A terrestrial, valley−type tillite up to 65 metres thick was revealed between two basaltic lava sequences in the Eocene– Oligocene Point Thomas Formation at Hervé Cove – Breccia Crag in Admiralty Bay, King George Island, South Shetland Islands. K−Ar dating of the lavas suggests the age of the gla− ciation at 45–41 Ma (Middle Eocene). It is the oldest Cenozoic record of alpine glaciers in West Antarctica, providing insight into the onset of glaciation of the Antarctic Peninsula and South Shetland Islands. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Krzysztof Birkenmajer Andrzej Gaździcki Krzysztof P. Krajewski Instytut Nauk Geologicznych Uniwersytet Wrocławski Pl. Maksa Borna Centrum Badań Ekologicznych Polska Akademia Nauk Ul. Konopnickiej |
author_facet |
Krzysztof Birkenmajer Andrzej Gaździcki Krzysztof P. Krajewski Instytut Nauk Geologicznych Uniwersytet Wrocławski Pl. Maksa Borna Centrum Badań Ekologicznych Polska Akademia Nauk Ul. Konopnickiej |
author_sort |
Krzysztof Birkenmajer |
title |
First Cenozoic glaciers in West Antarctica |
title_short |
First Cenozoic glaciers in West Antarctica |
title_full |
First Cenozoic glaciers in West Antarctica |
title_fullStr |
First Cenozoic glaciers in West Antarctica |
title_full_unstemmed |
First Cenozoic glaciers in West Antarctica |
title_sort |
first cenozoic glaciers in west antarctica |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.7803 http://www.polar.pan.pl/ppr26/ppr26-003.pdf |
long_lat |
ENVELOPE(-58.542,-58.542,-62.175,-62.175) ENVELOPE(-58.534,-58.534,-62.179,-62.179) ENVELOPE(-58.500,-58.500,-62.167,-62.167) |
geographic |
Admiralty Bay Antarctic Antarctic Peninsula Breccia Crag Hervé Cove King George Island Point Thomas South Shetland Islands The Antarctic West Antarctica |
geographic_facet |
Admiralty Bay Antarctic Antarctic Peninsula Breccia Crag Hervé Cove King George Island Point Thomas South Shetland Islands The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet King George Island South Shetland Islands West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet King George Island South Shetland Islands West Antarctica |
op_source |
http://www.polar.pan.pl/ppr26/ppr26-003.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.630.7803 http://www.polar.pan.pl/ppr26/ppr26-003.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766025063030587392 |