Articles | Volume 11, issue 12
https://doi.org/10.5194/cp-11-1599-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/cp-11-1599-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
07 Dec 2015
Research article |
| 07 Dec 2015
Expansion and diversification of high-latitude radiolarian assemblages in the late Eocene linked to a cooling event in the southwest Pacific
K. M. Pascher
CORRESPONDING AUTHOR
GNS Science, P.O. Box 30368, Lower Hutt 5040, New Zealand
Victoria University Wellington, Antarctic Research Centre, P.O. Box 600, Wellington 6140, New Zealand
C. J. Hollis
GNS Science, P.O. Box 30368, Lower Hutt 5040, New Zealand
S. M. Bohaty
Ocean and Earth Science, University of Southampton, National Oceanography Centre Southampton, European Way, Southampton SO14 3ZH, UK
G. Cortese
GNS Science, P.O. Box 30368, Lower Hutt 5040, New Zealand
R. M. McKay
Victoria University Wellington, Antarctic Research Centre, P.O. Box 600, Wellington 6140, New Zealand
H. Seebeck
GNS Science, P.O. Box 30368, Lower Hutt 5040, New Zealand
N. Suzuki
Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, Sendai City, 980-8578, Japan
K. Chiba
Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, Sendai City, 980-8578, Japan
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Cited
10 citations as recorded by crossref.
- Controls on Palaeogene deep-sea diatom-bearing sediment deposition and comparison with shallow marine environments C. Figus et al. https://doi.org/10.5194/bg-22-3029-2025
- Increasing opal productivity in the Late Eocene Southern Ocean: Evidence for increased carbon export preceding the Eocene-Oligocene glaciation V. Özen et al. https://doi.org/10.5194/cp-21-2283-2025
- Unraveling Southern Ocean diatom diversity across the Eocene–Oligocene transition V. Özen et al. https://doi.org/10.5194/jm-45-177-2026
- Surface-circulation change in the southwest Pacific Ocean across the Middle Eocene Climatic Optimum: inferences from dinoflagellate cysts and biomarker paleothermometry M. Cramwinckel et al. https://doi.org/10.5194/cp-16-1667-2020
- Eocene-Oligocene southwest Pacific Ocean paleoceanography new insights from foraminifera chemistry (DSDP site 277, Campbell Plateau) F. Hodel et al. https://doi.org/10.3389/feart.2022.998237
- Late middle Eocene to early Oligocene radiolarian biostratigraphy in the Southern Ocean (Agulhas Ridge, ODP Leg 117, Site 1090) A. Souza et al. https://doi.org/10.1016/j.marmicro.2021.102038
- Astronomical forcing of the hydrological cycle in the Weihe Basin (North China) during the middle to late Eocene R. Zhang et al. https://doi.org/10.1016/j.gloplacha.2023.104208
- Integrated calcareous nannofossil and magnetostratigraphic record of ODP Site 709: Middle Eocene to late Oligocene paleoclimate and paleoceanography of the Equatorial Indian Ocean G. Villa et al. https://doi.org/10.1016/j.marmicro.2021.102051
- Late Eocene–early Miocene evolution of the southern Australian subtropical front: a marine palynological approach F. Hoem et al. https://doi.org/10.5194/jm-40-175-2021
- No dramatic changes observed in subtropical radiolarian plankton assemblages during the Middle Eocene Climatic Optimum (MECO); evidence from the North Atlantic ODP Site 1051 M. Meunier & T. Danelian https://doi.org/10.1016/j.marmicro.2023.102272
10 citations as recorded by crossref.
- Controls on Palaeogene deep-sea diatom-bearing sediment deposition and comparison with shallow marine environments C. Figus et al. https://doi.org/10.5194/bg-22-3029-2025
- Increasing opal productivity in the Late Eocene Southern Ocean: Evidence for increased carbon export preceding the Eocene-Oligocene glaciation V. Özen et al. https://doi.org/10.5194/cp-21-2283-2025
- Unraveling Southern Ocean diatom diversity across the Eocene–Oligocene transition V. Özen et al. https://doi.org/10.5194/jm-45-177-2026
- Surface-circulation change in the southwest Pacific Ocean across the Middle Eocene Climatic Optimum: inferences from dinoflagellate cysts and biomarker paleothermometry M. Cramwinckel et al. https://doi.org/10.5194/cp-16-1667-2020
- Eocene-Oligocene southwest Pacific Ocean paleoceanography new insights from foraminifera chemistry (DSDP site 277, Campbell Plateau) F. Hodel et al. https://doi.org/10.3389/feart.2022.998237
- Late middle Eocene to early Oligocene radiolarian biostratigraphy in the Southern Ocean (Agulhas Ridge, ODP Leg 117, Site 1090) A. Souza et al. https://doi.org/10.1016/j.marmicro.2021.102038
- Astronomical forcing of the hydrological cycle in the Weihe Basin (North China) during the middle to late Eocene R. Zhang et al. https://doi.org/10.1016/j.gloplacha.2023.104208
- Integrated calcareous nannofossil and magnetostratigraphic record of ODP Site 709: Middle Eocene to late Oligocene paleoclimate and paleoceanography of the Equatorial Indian Ocean G. Villa et al. https://doi.org/10.1016/j.marmicro.2021.102051
- Late Eocene–early Miocene evolution of the southern Australian subtropical front: a marine palynological approach F. Hoem et al. https://doi.org/10.5194/jm-40-175-2021
- No dramatic changes observed in subtropical radiolarian plankton assemblages during the Middle Eocene Climatic Optimum (MECO); evidence from the North Atlantic ODP Site 1051 M. Meunier & T. Danelian https://doi.org/10.1016/j.marmicro.2023.102272
Saved (final revised paper)
Latest update: 09 Jun 2026
Short summary
Radiolarian taxa with high-latitude affinities are present from at least the middle Eocene in the SW Pacific and become very abundant in the late Eocene at all investigated sites. A short incursion of low-latitude taxa is observed during the MECO and late Eocene warming event at Site 277. Radiolarian abundance, diversity and taxa with high-latitude affinities increase at Site 277 in two steps in the latest Eocene due to climatic cooling and expansion of cold water masses.
Radiolarian taxa with high-latitude affinities are present from at least the middle Eocene in...
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