Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138
Three sites from Ocean Drilling Program (ODP) Leg 183 (Kerguelen Plateau) have been analyzed to document faunal change in high-latitude radiolarians and to compare the faunal change to Eocene-Oligocene climatic deterioration. Radiolarians are not preserved in Eocene sediments. In Oligocene sediments...
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Texas A & M University
2002
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ftoceanrep:oai:oceanrep.geomar.de:2349 2023-05-15T18:25:29+02:00 Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138 Apel, M. Kiessling, W. Böhm, Florian Lazarus, D. 2002 text https://oceanrep.geomar.de/id/eprint/2349/ https://oceanrep.geomar.de/id/eprint/2349/1/002.pdf http://www-odp.tamu.edu/publications/183_SR/002/002.htm en eng Texas A & M University https://oceanrep.geomar.de/id/eprint/2349/1/002.pdf Apel, M., Kiessling, W., Böhm, F. and Lazarus, D. (2002) Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138. Open Access Proceedings of the Ocean Drilling Program: Scientific Results, 183 . pp. 1-48. info:eu-repo/semantics/openAccess Article PeerReviewed 2002 ftoceanrep 2023-04-07T14:45:37Z Three sites from Ocean Drilling Program (ODP) Leg 183 (Kerguelen Plateau) have been analyzed to document faunal change in high-latitude radiolarians and to compare the faunal change to Eocene-Oligocene climatic deterioration. Radiolarians are not preserved in Eocene sediments. In Oligocene sediments, radiolarian preservation improves in a stepwise manner toward the Miocene. A total of 115 species were found in lower Oligocene samples from Site 1138; all are documented herein. Radiolarian preservation is presumably linked to productivity triggered by climatic cooling during the early Oligocene. Similar patterns of improving preservation through the Eocene/Oligocene boundary are documented from several Deep Sea Drilling Project and ODP sites in the Southern Ocean, indicating a general pattern. In contrast to the Southern Kerguelen Plateau, however, proxies for productivity are more divergent at Site 1138 (Central Kerguelen Plateau). Whereas carbonate dissolution, as indicated by poor preservation of foraminifers and common hiatuses, is very pronounced in the upper Eocene-lowermost Oligocene, the quality of radiolarian and diatom preservation does not significantly increase until the uppermost lower Oligocene. Multiple measures of radiolarian diversity in the Oligocene from Site 1138 closely parallel radiolarian preservation, indicating that preserved radiolarian diversity is controlled by productivity. Article in Journal/Newspaper Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Kerguelen Southern Ocean |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Three sites from Ocean Drilling Program (ODP) Leg 183 (Kerguelen Plateau) have been analyzed to document faunal change in high-latitude radiolarians and to compare the faunal change to Eocene-Oligocene climatic deterioration. Radiolarians are not preserved in Eocene sediments. In Oligocene sediments, radiolarian preservation improves in a stepwise manner toward the Miocene. A total of 115 species were found in lower Oligocene samples from Site 1138; all are documented herein. Radiolarian preservation is presumably linked to productivity triggered by climatic cooling during the early Oligocene. Similar patterns of improving preservation through the Eocene/Oligocene boundary are documented from several Deep Sea Drilling Project and ODP sites in the Southern Ocean, indicating a general pattern. In contrast to the Southern Kerguelen Plateau, however, proxies for productivity are more divergent at Site 1138 (Central Kerguelen Plateau). Whereas carbonate dissolution, as indicated by poor preservation of foraminifers and common hiatuses, is very pronounced in the upper Eocene-lowermost Oligocene, the quality of radiolarian and diatom preservation does not significantly increase until the uppermost lower Oligocene. Multiple measures of radiolarian diversity in the Oligocene from Site 1138 closely parallel radiolarian preservation, indicating that preserved radiolarian diversity is controlled by productivity. |
format |
Article in Journal/Newspaper |
author |
Apel, M. Kiessling, W. Böhm, Florian Lazarus, D. |
spellingShingle |
Apel, M. Kiessling, W. Böhm, Florian Lazarus, D. Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138 |
author_facet |
Apel, M. Kiessling, W. Böhm, Florian Lazarus, D. |
author_sort |
Apel, M. |
title |
Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138 |
title_short |
Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138 |
title_full |
Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138 |
title_fullStr |
Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138 |
title_full_unstemmed |
Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138 |
title_sort |
radiolarian faunal characteristics in oligocene of the kerguelen plateau, leg 183, site 1138 |
publisher |
Texas A & M University |
publishDate |
2002 |
url |
https://oceanrep.geomar.de/id/eprint/2349/ https://oceanrep.geomar.de/id/eprint/2349/1/002.pdf http://www-odp.tamu.edu/publications/183_SR/002/002.htm |
geographic |
Kerguelen Southern Ocean |
geographic_facet |
Kerguelen Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/2349/1/002.pdf Apel, M., Kiessling, W., Böhm, F. and Lazarus, D. (2002) Radiolarian faunal characteristics in Oligocene of the Kerguelen Plateau, Leg 183, Site 1138. Open Access Proceedings of the Ocean Drilling Program: Scientific Results, 183 . pp. 1-48. |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766206972706684928 |