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Viganò, Allyson; Coxall, Helen; Holmström, Max; Vinco, Martina; Lear, Caroline H; Agnini, Claudia (2023): Calcareous nannofossils, bulk and benthic foraminifera stable isotope from ODP Hole 121-756C [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.948646

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Published: 2023-03-14 • DOI registered: 2023-03-14

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Abstract:
The Eocene-Oligocene transition (EOT, ~34 Ma) is marked by changes in calcareous nannofossil assemblages and coincides with variations in sea-surface temperature and nutrient availability. During the EOT, calcareous nannofossil assemblages underwent an abrupt turnover with a permanent decline of warm-oligotrophic taxa, a decrease in species diversity and a remarkable increase in eutrophic taxa. Here, we combined calcareous nannofossil and planktonic foraminifera biostratigraphy from ODP Hole 756C (Ninetyeast Ridge, Indian Ocean), as well as new benthic foraminifera and bulk sediment stable isotope (C, O) records, which documents ocean-climate changes and provides independent chemostratigraphy. Our results provide further support to previous records documenting an invigorated Southern Ocean circulation associated with the transport of cooler and nutrient-enriched waters toward low-middle latitudes.
Keyword(s):
biostratigraphy; Calcareous nannofossils; Eocene-Oligocene Transition; ODP Hole 756C; paleoecology
Supplement to:
Viganò, Allyson; Coxall, Helen K; Holmström, Max; Vinco, Martina; Lear, Caroline H; Agnini, Claudia (2023): Calcareous nannofossils across the Eocene-Oligocene transition at Site 756 (Ninetyeast Ridge, Indian Ocean): implications for biostratigraphy and paleoceanographic clues. Newsletters on Stratigraphy, 56(2), 187-223, https://doi.org/10.1127/nos/2022/0725
Coverage:
Latitude: -27.354000 * Longitude: 87.598200
Date/Time Start: 1988-05-26T00:00:00 * Date/Time End: 1988-05-27T18:45:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
7 datasets

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Datasets listed in this bundled publication

  1. Viganò, A; Coxall, H; Holmström, M et al. (2023): Calcareous nannofossils from ODP Hole 121-756C. https://doi.org/10.1594/PANGAEA.948583
  2. Viganò, A; Coxall, H; Holmström, M et al. (2023): Semi-quantitative calcareous nannofossils counts from ODP Hole 121-756C. https://doi.org/10.1594/PANGAEA.948584
  3. Viganò, A; Coxall, H; Holmström, M et al. (2023): Relative abundance of calcareous nannofossils from ODP Hole 121-756C. https://doi.org/10.1594/PANGAEA.948586
  4. Viganò, A; Coxall, H; Holmström, M et al. (2023): Carbonate content and stable isotope from bulk samples of ODP Hole 121-756C. https://doi.org/10.1594/PANGAEA.948587
  5. Viganò, A; Coxall, H; Holmström, M et al. (2023): Stable isotope (δ¹³C and δ¹⁸O) of benthic foraminifera from ODP Hole 121-756C. https://doi.org/10.1594/PANGAEA.948588
  6. Viganò, A; Coxall, H; Holmström, M et al. (2023): Biostratigraphic of planktonic foraminifera (>180 µm fraction) from ODP Hole 121-756C. https://doi.org/10.1594/PANGAEA.948591
  7. Viganò, A; Coxall, H; Holmström, M et al. (2023): Biostratigraphic of planktonic foraminifera (>63 µm fraction) from ODP Hole 121-756C. https://doi.org/10.1594/PANGAEA.948592