Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge
Compositions and abundances of calcareous nannofossil taxa have been determined in a ca 170 kyrs long time interval across the Paleocene/Eocene boundary at 1-cm to 10-cm resolution from two ODP Sites (1262, 1263) drilled along the flank of the Walvis Ridge in the South Atlantic. The results are comp...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.774062 2023-05-15T18:43:19+02:00 Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge Raffi, Isabella Backman, Jan Zachos, James C Sluijs, Appy MEDIAN LATITUDE: -27.859552 * MEDIAN LONGITUDE: 2.178332 * SOUTH-BOUND LATITUDE: -28.533230 * WEST-BOUND LONGITUDE: 1.577000 * NORTH-BOUND LATITUDE: -27.185830 * EAST-BOUND LONGITUDE: 2.779700 * DATE/TIME START: 2003-03-24T13:00:00 * DATE/TIME END: 2003-04-05T10:15:00 2009-01-16 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.774062 https://doi.org/10.1594/PANGAEA.774062 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.774062 https://doi.org/10.1594/PANGAEA.774062 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Raffi, Isabella; Backman, Jan; Zachos, James C; Sluijs, Appy (2009): The response of calcareous nannofossil assemblages to the Paleocene Eocene Thermal Maximum at the Walvis Ridge in the South Atlantic. Marine Micropaleontology, 70(3-4), 201-212, https://doi.org/10.1016/j.marmicro.2008.12.005 208-1262A 208-1262B 208-1263C 208-1263D DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.774062 https://doi.org/10.1016/j.marmicro.2008.12.005 2023-01-20T07:32:23Z Compositions and abundances of calcareous nannofossil taxa have been determined in a ca 170 kyrs long time interval across the Paleocene/Eocene boundary at 1-cm to 10-cm resolution from two ODP Sites (1262, 1263) drilled along the flank of the Walvis Ridge in the South Atlantic. The results are compared to published data from ODP Site 690 in the Weddell Sea. The assemblages underwent rapid evolution over a 74 kyrs period, indicating stressed, unstable and/or extreme photic zone environments during the PETM hyperthermal. This rapid evolution, which created 5 distinct stratigraphic horizons, is consistent with the restricted brief occurrences of malformed and/or weakly calcified morphotypes. The production of these aberrant morphotypes is possibly caused by major global scale changes in carbon cycling in the ocean-atmosphere system, affecting also photic zone environments. No marked paleoecologically induced changes are observed in abundances of the genera Discoaster, Fasciculithus and Sphenolithus at the Walvis Ridge sites. Surprisingly, there is no significant correlation in abundance between these three genera, presumed to have had a similar paleoecological preference for warm and oligotrophic conditions. Dataset Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Weddell Weddell Sea ENVELOPE(1.577000,2.779700,-27.185830,-28.533230) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
208-1262A 208-1262B 208-1263C 208-1263D DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean |
spellingShingle |
208-1262A 208-1262B 208-1263C 208-1263D DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean Raffi, Isabella Backman, Jan Zachos, James C Sluijs, Appy Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge |
topic_facet |
208-1262A 208-1262B 208-1263C 208-1263D DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean |
description |
Compositions and abundances of calcareous nannofossil taxa have been determined in a ca 170 kyrs long time interval across the Paleocene/Eocene boundary at 1-cm to 10-cm resolution from two ODP Sites (1262, 1263) drilled along the flank of the Walvis Ridge in the South Atlantic. The results are compared to published data from ODP Site 690 in the Weddell Sea. The assemblages underwent rapid evolution over a 74 kyrs period, indicating stressed, unstable and/or extreme photic zone environments during the PETM hyperthermal. This rapid evolution, which created 5 distinct stratigraphic horizons, is consistent with the restricted brief occurrences of malformed and/or weakly calcified morphotypes. The production of these aberrant morphotypes is possibly caused by major global scale changes in carbon cycling in the ocean-atmosphere system, affecting also photic zone environments. No marked paleoecologically induced changes are observed in abundances of the genera Discoaster, Fasciculithus and Sphenolithus at the Walvis Ridge sites. Surprisingly, there is no significant correlation in abundance between these three genera, presumed to have had a similar paleoecological preference for warm and oligotrophic conditions. |
format |
Dataset |
author |
Raffi, Isabella Backman, Jan Zachos, James C Sluijs, Appy |
author_facet |
Raffi, Isabella Backman, Jan Zachos, James C Sluijs, Appy |
author_sort |
Raffi, Isabella |
title |
Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge |
title_short |
Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge |
title_full |
Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge |
title_fullStr |
Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge |
title_full_unstemmed |
Calcareous nannofossil during the Paleocene Eocene Thermal Maximum in sediments of Walvish Ridge |
title_sort |
calcareous nannofossil during the paleocene eocene thermal maximum in sediments of walvish ridge |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.774062 https://doi.org/10.1594/PANGAEA.774062 |
op_coverage |
MEDIAN LATITUDE: -27.859552 * MEDIAN LONGITUDE: 2.178332 * SOUTH-BOUND LATITUDE: -28.533230 * WEST-BOUND LONGITUDE: 1.577000 * NORTH-BOUND LATITUDE: -27.185830 * EAST-BOUND LONGITUDE: 2.779700 * DATE/TIME START: 2003-03-24T13:00:00 * DATE/TIME END: 2003-04-05T10:15:00 |
long_lat |
ENVELOPE(1.577000,2.779700,-27.185830,-28.533230) |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Weddell Sea |
genre_facet |
Weddell Sea |
op_source |
Supplement to: Raffi, Isabella; Backman, Jan; Zachos, James C; Sluijs, Appy (2009): The response of calcareous nannofossil assemblages to the Paleocene Eocene Thermal Maximum at the Walvis Ridge in the South Atlantic. Marine Micropaleontology, 70(3-4), 201-212, https://doi.org/10.1016/j.marmicro.2008.12.005 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.774062 https://doi.org/10.1594/PANGAEA.774062 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.774062 https://doi.org/10.1016/j.marmicro.2008.12.005 |
_version_ |
1766233637353684992 |