West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation
The Eocene-Oligocene Transition (~34.4–33.7 Ma) marks a major step in the long-term evolution from the greenhouse climate of the Early Palaeogene to the icehouse regime of the Late Neogene and Quaternary. However, it remains uncertain which landmasses were covered by ice sheets during the Early Olig...
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ftawi:oai:epic.awi.de:54031 2024-09-15T17:39:09+00:00 West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Bickert, Torsten Lohmann, Gerrit Gohl, Karsten Kuhn, Gerhard Titschack, Jürgen Müller, Juliane Bauersachs, Thorsten Frederichs, Thomas Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Rodríguez Tovar, Francisco J. Schmiedl, Gerhard van de Flierdt, Tina Spiegel, Cornelia Eisenhauer, Anton PS104, Science Team of Expedition 2021 https://epic.awi.de/id/eprint/54031/ https://hdl.handle.net/10013/epic.d081bef3-044e-452d-b2f4-e660e9e5dbaa unknown Klages, J. P. orcid:0000-0003-0968-1183 , Hillenbrand, C. D. , Bohaty, S. M. , Salzmann, U. , Bickert, T. , Lohmann, G. orcid:0000-0003-2089-733X , Gohl, K. orcid:0000-0002-9558-2116 , Kuhn, G. orcid:0000-0001-6069-7485 , Titschack, J. , Müller, J. orcid:0000-0003-0724-4131 , Bauersachs, T. , Frederichs, T. , Larter, R. D. , Hochmuth, K. orcid:0000-0003-2789-2179 , Ehrmann, W. , Rodríguez Tovar, F. J. , Schmiedl, G. , van de Flierdt, T. , Spiegel, C. , Eisenhauer, A. and PS104, S. T. o. E. (2021) West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation , vEGU21: Gather Online, Online, 19 April 2021 - 30 April 2021 . doi:10.5194/egusphere-egu21-1538 <https://doi.org/10.5194/egusphere-egu21-1538> , hdl:10013/epic.d081bef3-044e-452d-b2f4-e660e9e5dbaa EPIC3vEGU21: Gather Online, Online, 2021-04-19-2021-04-30 Conference notRev 2021 ftawi https://doi.org/10.5194/egusphere-egu21-1538 2024-06-24T04:26:11Z The Eocene-Oligocene Transition (~34.4–33.7 Ma) marks a major step in the long-term evolution from the greenhouse climate of the Early Palaeogene to the icehouse regime of the Late Neogene and Quaternary. However, it remains uncertain which landmasses were covered by ice sheets during the Early Oligocene Glacial Maximum (~33.7–33.2 Ma), an interval of peak glaciation inferred from deep-sea benthic foraminifera oxygen isotope records that immediately follows the Eocene-Oligocene Transition. The scarcity of Late Eocene and Early Oligocene continental and shallow-marine records in both Arctic and Antarctic regions has prevented the reconstruction of environmental conditions and ice-sheet extent during the Early Oligocene, which is critical for assessing ice–ocean–atmosphere interactions during early stages of the Cenozoic icehouse. Here, we present the first Early Oligocene shallow-marine record from the Pacific margin of West Antarctica, recovered from the central Amundsen Sea Embayment shelf on RV Polarstern expedition PS104 at Site 21. Marine mudstones recovered at this site document the presence of a vegetated archipelago at a palaeo-latitude of 73.5°S. Pollen assemblages and organic biomarker proxies indicate a cool-temperate Nothofagus-dominated forest situated within a productive marine archipelago. No evidence for marine terminating ice was detected in the cores from Site 21, thus indicating that the West Antarctic Ice Sheet was small or entirely absent during the Early Oligocene. Conference Object Amundsen Sea Antarc* Antarctic Antarctica Foraminifera* Ice Sheet West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The Eocene-Oligocene Transition (~34.4–33.7 Ma) marks a major step in the long-term evolution from the greenhouse climate of the Early Palaeogene to the icehouse regime of the Late Neogene and Quaternary. However, it remains uncertain which landmasses were covered by ice sheets during the Early Oligocene Glacial Maximum (~33.7–33.2 Ma), an interval of peak glaciation inferred from deep-sea benthic foraminifera oxygen isotope records that immediately follows the Eocene-Oligocene Transition. The scarcity of Late Eocene and Early Oligocene continental and shallow-marine records in both Arctic and Antarctic regions has prevented the reconstruction of environmental conditions and ice-sheet extent during the Early Oligocene, which is critical for assessing ice–ocean–atmosphere interactions during early stages of the Cenozoic icehouse. Here, we present the first Early Oligocene shallow-marine record from the Pacific margin of West Antarctica, recovered from the central Amundsen Sea Embayment shelf on RV Polarstern expedition PS104 at Site 21. Marine mudstones recovered at this site document the presence of a vegetated archipelago at a palaeo-latitude of 73.5°S. Pollen assemblages and organic biomarker proxies indicate a cool-temperate Nothofagus-dominated forest situated within a productive marine archipelago. No evidence for marine terminating ice was detected in the cores from Site 21, thus indicating that the West Antarctic Ice Sheet was small or entirely absent during the Early Oligocene. |
format |
Conference Object |
author |
Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Bickert, Torsten Lohmann, Gerrit Gohl, Karsten Kuhn, Gerhard Titschack, Jürgen Müller, Juliane Bauersachs, Thorsten Frederichs, Thomas Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Rodríguez Tovar, Francisco J. Schmiedl, Gerhard van de Flierdt, Tina Spiegel, Cornelia Eisenhauer, Anton PS104, Science Team of Expedition |
spellingShingle |
Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Bickert, Torsten Lohmann, Gerrit Gohl, Karsten Kuhn, Gerhard Titschack, Jürgen Müller, Juliane Bauersachs, Thorsten Frederichs, Thomas Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Rodríguez Tovar, Francisco J. Schmiedl, Gerhard van de Flierdt, Tina Spiegel, Cornelia Eisenhauer, Anton PS104, Science Team of Expedition West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation |
author_facet |
Klages, Johann Philipp Hillenbrand, Claus-Dieter Bohaty, Steven M. Salzmann, Ulrich Bickert, Torsten Lohmann, Gerrit Gohl, Karsten Kuhn, Gerhard Titschack, Jürgen Müller, Juliane Bauersachs, Thorsten Frederichs, Thomas Larter, Robert D. Hochmuth, Katharina Ehrmann, Werner Rodríguez Tovar, Francisco J. Schmiedl, Gerhard van de Flierdt, Tina Spiegel, Cornelia Eisenhauer, Anton PS104, Science Team of Expedition |
author_sort |
Klages, Johann Philipp |
title |
West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation |
title_short |
West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation |
title_full |
West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation |
title_fullStr |
West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation |
title_full_unstemmed |
West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation |
title_sort |
west antarctic archipelago covered by cool-temperate forests during the early oligocene glaciation |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54031/ https://hdl.handle.net/10013/epic.d081bef3-044e-452d-b2f4-e660e9e5dbaa |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Foraminifera* Ice Sheet West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Foraminifera* Ice Sheet West Antarctica |
op_source |
EPIC3vEGU21: Gather Online, Online, 2021-04-19-2021-04-30 |
op_relation |
Klages, J. P. orcid:0000-0003-0968-1183 , Hillenbrand, C. D. , Bohaty, S. M. , Salzmann, U. , Bickert, T. , Lohmann, G. orcid:0000-0003-2089-733X , Gohl, K. orcid:0000-0002-9558-2116 , Kuhn, G. orcid:0000-0001-6069-7485 , Titschack, J. , Müller, J. orcid:0000-0003-0724-4131 , Bauersachs, T. , Frederichs, T. , Larter, R. D. , Hochmuth, K. orcid:0000-0003-2789-2179 , Ehrmann, W. , Rodríguez Tovar, F. J. , Schmiedl, G. , van de Flierdt, T. , Spiegel, C. , Eisenhauer, A. and PS104, S. T. o. E. (2021) West Antarctic archipelago covered by cool-temperate forests during the early Oligocene glaciation , vEGU21: Gather Online, Online, 19 April 2021 - 30 April 2021 . doi:10.5194/egusphere-egu21-1538 <https://doi.org/10.5194/egusphere-egu21-1538> , hdl:10013/epic.d081bef3-044e-452d-b2f4-e660e9e5dbaa |
op_doi |
https://doi.org/10.5194/egusphere-egu21-1538 |
_version_ |
1810477821929193472 |