Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica)
ANDRILL Core AND-1B, recovered in the Western Ross Sea of Antarctica, has been examined in search of calcareous nannofossils. Exhaustive and detailed analyses of the interval from 86.61 to 98.99 mbsf revealed for the first time at an extreme southern high latitude (77.88° S) the presence of lower Pl...
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ftunivparmairis:oai:air.unipr.it:11381/2534452 2024-04-14T08:01:41+00:00 Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica) VILLA, Giuliana PERSICO, Davide Sherwood W. Wise Alessia Gadaleta Villa, Giuliana Persico, Davide Sherwood W., Wise Alessia, Gadaleta 2012 http://hdl.handle.net/11381/2534452 https://doi.org/10.1016/j.gloplacha.2009.12.003 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000309896800006 volume:96-97 firstpage:75 lastpage:86 numberofpages:12 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11381/2534452 doi:10.1016/j.gloplacha.2009.12.003 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84866417632 info:eu-repo/semantics/closedAccess Calcareous nannofossil Pleistocene Palaeoclimate MIS-31 ANDRILL Antarctica info:eu-repo/semantics/article 2012 ftunivparmairis https://doi.org/10.1016/j.gloplacha.2009.12.003 2024-03-21T18:36:30Z ANDRILL Core AND-1B, recovered in the Western Ross Sea of Antarctica, has been examined in search of calcareous nannofossils. Exhaustive and detailed analyses of the interval from 86.61 to 98.99 mbsf revealed for the first time at an extreme southern high latitude (77.88° S) the presence of lower Pleistocene calcareous nannofossils, together with Tertiary and Upper Cretaceous reworked species. Other calcareous microfossils in the assemblage include, spicules of calciosponges and small foraminifers. The short normal magnetozone between 84.97 and 91.13 mbsf is correlated with the Jaramillo Subchron (C1r.1n) (Wilson et al., 2007). The presence of nannofossils in the biogenic interglacial sediments is consistent with an episode of warm surface waters and open-marine conditions during the Jaramillo subchron, at ~1 Ma, which corresponds with Marine Isotope Stage (MIS)-31 (Scherer et al., 2007; Naish et al., 2007). Climate proxies such as oxygen isotope stratigraphy and calcareous nannofossils at ODP Site 1165 (Pospichal, 2003; Villa et al., 2008) and the diatom assemblage in a shelly carbonate sequence at Cape Roberts 1 (Bohaty et al., 1998) also support a warming event during this time and suggest it extended around the Antarctic Continent. This in turn implies a total or partial collapse of the McMurdo Ice Shelf and a concurrent shift or temporary dissipation of the Polar Front (Antarctic Convergence) and Antarctic Divergence that currently serve as barriers to the influx of calcareous nannofossils to the margins of Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf McMurdo Ice Shelf Ross Sea Archivio della ricerca dell'Università di Parma (CINECA IRIS) Antarctic Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) McMurdo Ice Shelf ENVELOPE(166.500,166.500,-78.000,-78.000) Ross Sea The Antarctic Global and Planetary Change 96-97 75 86 |
institution |
Open Polar |
collection |
Archivio della ricerca dell'Università di Parma (CINECA IRIS) |
op_collection_id |
ftunivparmairis |
language |
unknown |
topic |
Calcareous nannofossil Pleistocene Palaeoclimate MIS-31 ANDRILL Antarctica |
spellingShingle |
Calcareous nannofossil Pleistocene Palaeoclimate MIS-31 ANDRILL Antarctica VILLA, Giuliana PERSICO, Davide Sherwood W. Wise Alessia Gadaleta Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica) |
topic_facet |
Calcareous nannofossil Pleistocene Palaeoclimate MIS-31 ANDRILL Antarctica |
description |
ANDRILL Core AND-1B, recovered in the Western Ross Sea of Antarctica, has been examined in search of calcareous nannofossils. Exhaustive and detailed analyses of the interval from 86.61 to 98.99 mbsf revealed for the first time at an extreme southern high latitude (77.88° S) the presence of lower Pleistocene calcareous nannofossils, together with Tertiary and Upper Cretaceous reworked species. Other calcareous microfossils in the assemblage include, spicules of calciosponges and small foraminifers. The short normal magnetozone between 84.97 and 91.13 mbsf is correlated with the Jaramillo Subchron (C1r.1n) (Wilson et al., 2007). The presence of nannofossils in the biogenic interglacial sediments is consistent with an episode of warm surface waters and open-marine conditions during the Jaramillo subchron, at ~1 Ma, which corresponds with Marine Isotope Stage (MIS)-31 (Scherer et al., 2007; Naish et al., 2007). Climate proxies such as oxygen isotope stratigraphy and calcareous nannofossils at ODP Site 1165 (Pospichal, 2003; Villa et al., 2008) and the diatom assemblage in a shelly carbonate sequence at Cape Roberts 1 (Bohaty et al., 1998) also support a warming event during this time and suggest it extended around the Antarctic Continent. This in turn implies a total or partial collapse of the McMurdo Ice Shelf and a concurrent shift or temporary dissipation of the Polar Front (Antarctic Convergence) and Antarctic Divergence that currently serve as barriers to the influx of calcareous nannofossils to the margins of Antarctica. |
author2 |
Villa, Giuliana Persico, Davide Sherwood W., Wise Alessia, Gadaleta |
format |
Article in Journal/Newspaper |
author |
VILLA, Giuliana PERSICO, Davide Sherwood W. Wise Alessia Gadaleta |
author_facet |
VILLA, Giuliana PERSICO, Davide Sherwood W. Wise Alessia Gadaleta |
author_sort |
VILLA, Giuliana |
title |
Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica) |
title_short |
Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica) |
title_full |
Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica) |
title_fullStr |
Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica) |
title_full_unstemmed |
Calcareous nannofossil evidence for Marine Isotope Stage 31 (1 Ma) in Core AND-1B, ANDRILL McMurdo Ice Shelf Project (Antarctica) |
title_sort |
calcareous nannofossil evidence for marine isotope stage 31 (1 ma) in core and-1b, andrill mcmurdo ice shelf project (antarctica) |
publishDate |
2012 |
url |
http://hdl.handle.net/11381/2534452 https://doi.org/10.1016/j.gloplacha.2009.12.003 |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(166.500,166.500,-78.000,-78.000) |
geographic |
Antarctic Cape Roberts McMurdo Ice Shelf Ross Sea The Antarctic |
geographic_facet |
Antarctic Cape Roberts McMurdo Ice Shelf Ross Sea The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Shelf McMurdo Ice Shelf Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf McMurdo Ice Shelf Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000309896800006 volume:96-97 firstpage:75 lastpage:86 numberofpages:12 journal:GLOBAL AND PLANETARY CHANGE http://hdl.handle.net/11381/2534452 doi:10.1016/j.gloplacha.2009.12.003 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84866417632 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.gloplacha.2009.12.003 |
container_title |
Global and Planetary Change |
container_volume |
96-97 |
container_start_page |
75 |
op_container_end_page |
86 |
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1796310276780326912 |