Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence
Oxygen isotopic compositions of the tests of mainly benthic foraminifera, from sections of conformable Late Eocene (Runangan) to Early Oligocene (Whaingaroan) shelf mudstones, at both Cape Foulwind and Port Elizabeth, western South Island, indicate that shelf sea paleotemperatures followed the globa...
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ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/4838 2023-05-15T14:00:59+02:00 Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence Burns, David A. Nelson, Campbell S. 1981 application/pdf https://hdl.handle.net/10289/4838 en eng The Royal Society of New Zealand http://www.royalsociety.org.nz/publications/journals/nzjg/ Burns, D.A. & Nelson, C.S. (1981). Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence. New Zealand Journal of Geology and Geophysics, 24, 529-538. https://hdl.handle.net/10289/4838 This article has been published in the journal: New Zealand Journal of Geology and Geophysics. © 1981 The Royal Society of New Zealand. Used with permission. paleotemperatures oxygen isotopes Eocene Oligocene Runangan Stage Whaingaroan Stage foraminifera shelf sediments Journal Article 1981 ftunivwaikato 2022-03-29T15:11:38Z Oxygen isotopic compositions of the tests of mainly benthic foraminifera, from sections of conformable Late Eocene (Runangan) to Early Oligocene (Whaingaroan) shelf mudstones, at both Cape Foulwind and Port Elizabeth, western South Island, indicate that shelf sea paleotemperatures followed the global open-ocean trend towards a Paleogene minimum near the Eocene-Oligocene boundary. Throughout the latest Eocene, temperatures declined steadily by 3°C, showed a temporary minor warming at the Eocenc-Oligocene boundary, dropped sharply by 2°C in the Early Oligocene, and ameliorated significantly later in the Early Oligocene. The qualitative temperature trends for New Zealand shelf waters at this time are similar to those inferred from earlier paleontologic syntheses and limited oxygen isotopic work, but involve a range of temperatures within the warm and cool temperate climatic zones and an absolute temperature depression across the Eocene-Oligocene boundary of only 5°C from about 17 to 12°C. Results are consistent with isotopic paleotemperatures determined from deep-sea sediment cores south of New Zealand where the cooling is inferred to mark the onset of production of Antarctic bottom waters at near-freezing temperatures. Article in Journal/Newspaper Antarc* Antarctic The University of Waikato: Research Commons Antarctic New Zealand |
institution |
Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
topic |
paleotemperatures oxygen isotopes Eocene Oligocene Runangan Stage Whaingaroan Stage foraminifera shelf sediments |
spellingShingle |
paleotemperatures oxygen isotopes Eocene Oligocene Runangan Stage Whaingaroan Stage foraminifera shelf sediments Burns, David A. Nelson, Campbell S. Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence |
topic_facet |
paleotemperatures oxygen isotopes Eocene Oligocene Runangan Stage Whaingaroan Stage foraminifera shelf sediments |
description |
Oxygen isotopic compositions of the tests of mainly benthic foraminifera, from sections of conformable Late Eocene (Runangan) to Early Oligocene (Whaingaroan) shelf mudstones, at both Cape Foulwind and Port Elizabeth, western South Island, indicate that shelf sea paleotemperatures followed the global open-ocean trend towards a Paleogene minimum near the Eocene-Oligocene boundary. Throughout the latest Eocene, temperatures declined steadily by 3°C, showed a temporary minor warming at the Eocenc-Oligocene boundary, dropped sharply by 2°C in the Early Oligocene, and ameliorated significantly later in the Early Oligocene. The qualitative temperature trends for New Zealand shelf waters at this time are similar to those inferred from earlier paleontologic syntheses and limited oxygen isotopic work, but involve a range of temperatures within the warm and cool temperate climatic zones and an absolute temperature depression across the Eocene-Oligocene boundary of only 5°C from about 17 to 12°C. Results are consistent with isotopic paleotemperatures determined from deep-sea sediment cores south of New Zealand where the cooling is inferred to mark the onset of production of Antarctic bottom waters at near-freezing temperatures. |
format |
Article in Journal/Newspaper |
author |
Burns, David A. Nelson, Campbell S. |
author_facet |
Burns, David A. Nelson, Campbell S. |
author_sort |
Burns, David A. |
title |
Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence |
title_short |
Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence |
title_full |
Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence |
title_fullStr |
Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence |
title_full_unstemmed |
Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence |
title_sort |
oxygen isotopic paleotemperatures across the runangan-whaingaroan (eocene-oligocene) boundary in a new zealand shelf sequence |
publisher |
The Royal Society of New Zealand |
publishDate |
1981 |
url |
https://hdl.handle.net/10289/4838 |
geographic |
Antarctic New Zealand |
geographic_facet |
Antarctic New Zealand |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://www.royalsociety.org.nz/publications/journals/nzjg/ Burns, D.A. & Nelson, C.S. (1981). Oxygen isotopic paleotemperatures across the Runangan-Whaingaroan (Eocene-Oligocene) boundary in a New Zealand shelf sequence. New Zealand Journal of Geology and Geophysics, 24, 529-538. https://hdl.handle.net/10289/4838 |
op_rights |
This article has been published in the journal: New Zealand Journal of Geology and Geophysics. © 1981 The Royal Society of New Zealand. Used with permission. |
_version_ |
1766270389127741440 |