Calcareous nannofossils, bulk and benthic foraminifera stable isotope from ODP Hole 121-756C
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| Autori principali: | , , , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2023
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| _version_ | 1867168576050298880 |
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| author | Viganò, Allyson Coxall, Helen Holmström, Max Vinco, Martina Lear, Caroline H Agnini, Claudia |
| author_facet | Viganò, Allyson Coxall, Helen Holmström, Max Vinco, Martina Lear, Caroline H Agnini, Claudia |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_948646 |
| institution | PANGAEA |
| language | en |
| publishDate | 2023 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Calcareous nannofossils, bulk and benthic foraminifera stable isotope from ODP Hole 121-756C Viganò, Allyson Coxall, Helen Holmström, Max Vinco, Martina Lear, Caroline H Agnini, Claudia Biostratigraphy; Calcareous nannofossils; Eocene-Oligocene Transition; ODP Hole 756C; paleoecology 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. |
| title | Calcareous nannofossils, bulk and benthic foraminifera stable isotope from ODP Hole 121-756C |
| topic | Biostratigraphy; Calcareous nannofossils; Eocene-Oligocene Transition; ODP Hole 756C; paleoecology |
| url | https://doi.org/10.1594/PANGAEA.948646 |