A glimpse of Late Cretaceous West Antarctica
The ‘greenhouse climate’ of the Late Cretaceous epoch was one of the Earth’s warmest periods of the past 140 Ma, particularly at high latitudes. However, records allowing insights into terrestrial environmental conditions south of the Antarctic circle during that time are extremely rare. Hence, it r...
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ftawi:oai:epic.awi.de:49685 2024-09-15T17:39:09+00:00 A glimpse of Late Cretaceous West Antarctica Klages, Johann Philipp Salzmann, Ulrich Bickert, Torsten Hillenbrand, Claus-Dieter Gohl, Karsten Kuhn, Gerhard Bohaty, Steve Titschack, Jürgen Bauersachs, Thorsten 2019 https://epic.awi.de/id/eprint/49685/ https://hdl.handle.net/10013/epic.20f720ae-c188-4e7c-b5f6-df7fa7eb8a3a unknown Klages, J. P. , Salzmann, U. , Bickert, T. , Hillenbrand, C. D. , Gohl, K. orcid:0000-0002-9558-2116 , Kuhn, G. orcid:0000-0001-6069-7485 , Bohaty, S. , Titschack, J. and Bauersachs, T. , PS104 Shipboard Scientific Party (2019) A glimpse of Late Cretaceous West Antarctica , 43. Treffen des DGP Arbeitskreises "Geologie und Geophysik der Polargebiete", Fürstbischöfliches Schloss Münster, 23 May 2019 - 24 May 2019 . hdl:10013/epic.20f720ae-c188-4e7c-b5f6-df7fa7eb8a3a EPIC343. Treffen des DGP Arbeitskreises "Geologie und Geophysik der Polargebiete", Fürstbischöfliches Schloss Münster, 2019-05-23-2019-05-24 Conference notRev 2019 ftawi 2024-06-24T04:22:11Z The ‘greenhouse climate’ of the Late Cretaceous epoch was one of the Earth’s warmest periods of the past 140 Ma, particularly at high latitudes. However, records allowing insights into terrestrial environmental conditions south of the Antarctic circle during that time are extremely rare. Hence, it remains highly elusive how the sensitive South Polar environment may have been impacted by such an extreme climate. Here we report a unique sedimentary sequence that was recovered with the MeBo-70 sea floor drill rig from the central Amundsen Sea Embayment shelf, West Antarctica. The record contains ~26 m of quartzitic sandstone underlain by a lithified swamp deposit that consists of a ~2 m-long complex and intact network of in-situ fossil plant roots embedded in a mudstone matrix. The lower ~1.5 m of this mudstone contain a highly diverse pollen and spore assemblage, documenting a temperate coastal lowland rain forest environment with mean annual temperatures of 11-15°C at a palaeolatitude of 77°S. Hence, the drill record provides the hitherto southernmost evidence of Cretaceous terrestrial environmental conditions and reveals a ‘greenhouse climate’ that was capable of maintaining a temperate environment much further south than previously known. The predictive capabilities of model simulations for high-latitude climate and environment characteristics for this critical period of Earth’s climatic history can therefore now be evaluated more reliably. Conference Object Amundsen Sea Antarc* Antarctic Antarctica West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The ‘greenhouse climate’ of the Late Cretaceous epoch was one of the Earth’s warmest periods of the past 140 Ma, particularly at high latitudes. However, records allowing insights into terrestrial environmental conditions south of the Antarctic circle during that time are extremely rare. Hence, it remains highly elusive how the sensitive South Polar environment may have been impacted by such an extreme climate. Here we report a unique sedimentary sequence that was recovered with the MeBo-70 sea floor drill rig from the central Amundsen Sea Embayment shelf, West Antarctica. The record contains ~26 m of quartzitic sandstone underlain by a lithified swamp deposit that consists of a ~2 m-long complex and intact network of in-situ fossil plant roots embedded in a mudstone matrix. The lower ~1.5 m of this mudstone contain a highly diverse pollen and spore assemblage, documenting a temperate coastal lowland rain forest environment with mean annual temperatures of 11-15°C at a palaeolatitude of 77°S. Hence, the drill record provides the hitherto southernmost evidence of Cretaceous terrestrial environmental conditions and reveals a ‘greenhouse climate’ that was capable of maintaining a temperate environment much further south than previously known. The predictive capabilities of model simulations for high-latitude climate and environment characteristics for this critical period of Earth’s climatic history can therefore now be evaluated more reliably. |
format |
Conference Object |
author |
Klages, Johann Philipp Salzmann, Ulrich Bickert, Torsten Hillenbrand, Claus-Dieter Gohl, Karsten Kuhn, Gerhard Bohaty, Steve Titschack, Jürgen Bauersachs, Thorsten |
spellingShingle |
Klages, Johann Philipp Salzmann, Ulrich Bickert, Torsten Hillenbrand, Claus-Dieter Gohl, Karsten Kuhn, Gerhard Bohaty, Steve Titschack, Jürgen Bauersachs, Thorsten A glimpse of Late Cretaceous West Antarctica |
author_facet |
Klages, Johann Philipp Salzmann, Ulrich Bickert, Torsten Hillenbrand, Claus-Dieter Gohl, Karsten Kuhn, Gerhard Bohaty, Steve Titschack, Jürgen Bauersachs, Thorsten |
author_sort |
Klages, Johann Philipp |
title |
A glimpse of Late Cretaceous West Antarctica |
title_short |
A glimpse of Late Cretaceous West Antarctica |
title_full |
A glimpse of Late Cretaceous West Antarctica |
title_fullStr |
A glimpse of Late Cretaceous West Antarctica |
title_full_unstemmed |
A glimpse of Late Cretaceous West Antarctica |
title_sort |
glimpse of late cretaceous west antarctica |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49685/ https://hdl.handle.net/10013/epic.20f720ae-c188-4e7c-b5f6-df7fa7eb8a3a |
genre |
Amundsen Sea Antarc* Antarctic Antarctica West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica West Antarctica |
op_source |
EPIC343. Treffen des DGP Arbeitskreises "Geologie und Geophysik der Polargebiete", Fürstbischöfliches Schloss Münster, 2019-05-23-2019-05-24 |
op_relation |
Klages, J. P. , Salzmann, U. , Bickert, T. , Hillenbrand, C. D. , Gohl, K. orcid:0000-0002-9558-2116 , Kuhn, G. orcid:0000-0001-6069-7485 , Bohaty, S. , Titschack, J. and Bauersachs, T. , PS104 Shipboard Scientific Party (2019) A glimpse of Late Cretaceous West Antarctica , 43. Treffen des DGP Arbeitskreises "Geologie und Geophysik der Polargebiete", Fürstbischöfliches Schloss Münster, 23 May 2019 - 24 May 2019 . hdl:10013/epic.20f720ae-c188-4e7c-b5f6-df7fa7eb8a3a |
_version_ |
1810477792537608192 |