Integrated calcareous nannofossil and magnetostratigraphic record of ODP Site 709: Middle Eocene to late Oligocene paleoclimate and paleoceanography of the Equatorial Indian Ocean

Villa, Giuliana; Florindo, Fabio; Persico, Davide; Lurcock, Pontus; Martini, Ana Paula de; Jovane, Luigi; Fioroni, Chiara

doi:10.1016/j.marmicro.2021.102051

Cited by 7 publications

(21 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our datum is consistent with those provided by de Kaenel and Villa (1996), Bordiga et al (2015) and more recently by Villa et al (2021), which indicate that this event occurs in the early Oligocene.…”

Section: Figs 7-8supporting

confidence: 92%

“…Ericsonia is thought to have thrived in warm-waters in the Paleogene (Haq and Lohmann 1976, Wei and Wise 1990, Aubry 1992, Kelly et al 1996, Bralower 2002 and is considered a warm water indicator (Villa et al 2008(Villa et al , 2014(Villa et al , 2021. Discoaster has been consistently considered as a warm-water taxon, common in oligotrophic environments (Aubry 1998, Bralower 2002.…”

Section: Paleoenvironmental Changes During the Late Eocene -Early Oli...mentioning

confidence: 99%

“…The negative loadings on PC1 are Reticulofenestra and Cyclicargolithus. Reticulofenestra is an eurytopic cosmopolitan taxon, thriving in a wide range of environmental conditions with a preference for temperate waters (Wei and Wise 1990, Shcherbinina 2010, Cappelli et al 2019, while Cyclicargolithus floridanus is considered a species with preferences for eutrophic-high productivity environments (Aubry 1992, Villa et al 2021.…”

Section: Paleoenvironmental Changes During the Late Eocene -Early Oli...mentioning

confidence: 99%

“…Chiasmolithus is thought to be indicative of cool-cold water conditions (Wei and Wise 1990, Wei et al 1992Bralower 2002, Persico and Villa 2004, Tremolada and Bralower 2004, Villa and Persico 2006), an ecological affinity that is confirmed in our study. Genus Sphenolithus is known to be considered a warm water taxon (Villa et al 2021) adapted to oligotrophic environments (Aubry 1998, Bralower 2002, Gibbs et al 2004, Kalb and Bralower 2012, even so the study carried out by Wade and Bown (2006) shows a strong increase of sphenoliths during eutrophic conditions. It is becoming increasingly evident that species belonging to the same genus can in fact better thrive in a wide trophic continuum (Dunkley Jones et al 2008, Toffanin et al 2011, Cappelli et al 2021 showing species-specific responses to climate/environmental changes.…”

Section: Paleoenvironmental Changes During the Late Eocene -Early Oli...mentioning

confidence: 99%

“…To date, calcareous nannofossil responses still lack a global perspective and only few high-resolution studies are available for the EOT at high (Southern Ocean; Persico and Villa 2004 and midlow latitudes (Tanzania, Dunkley South Atlantic, Bordiga et al 2015;Equatorial Indian Ocean, Fioroni et al 2015, Villa et al 2021Indonesia, Jones et al 2019). From a biostratigraphic point of view, the E-O transition is characterized by a low rate of evolution, despite assemblage compositional changes, which is reflected in a scarcity of useful calcareous nannofossils biohorizons (Raffi et al 2016).…”

mentioning

confidence: 99%

See 4 more Smart Citations

Calcareous nannofossils across the Eocene-Oligocene transition at Site 756 (Ninetyeast Ridge, Indian Ocean): implications for biostratigraphy and paleoceanographic clues

Viganò¹,

Coxall²,

Holmström³

et al. 2023

nos

View full text Add to dashboard Cite

The timing and modalities of calcareous phytoplankton community and evolutionary responses to the Eocene-Oligocene transition (EOT, ~ 34 Ma) are still under-investigated. In order to better constrain the dynamics of these pelagic primary producers during the climate transition, we conducted high resolution assemblage analysis on calcareous nannofossils across a ~19 m-thick interval of nannofossil ooze at Ocean Drilling Program (ODP) Site 756 (Ninetyeast Ridge, Indian Ocean; Peirce et al. 1989) (paleolatitude ~43°S; Zachos et al. 1992). We explored the diversity patterns against a new integrated planktonic foraminifera and calcareous nannofossil biostratigraphy produced for the site, as well as new benthic foraminifera stable isotope (C, O) record, which documents ocean-climate changes, and provides independent chemostratigraphy. The study section spans nannofossil Zones NP20-NP23 (equivalent to CNE20-CNO4) and lasts 5.6 Myr. The results show that the hankeninid extinction falls within the ~4.5 m-thick EOT isotopic interval (0.67 m below the base of the second positive δ 18 O shift -EOIS), which is consistent with previous studies, making Hole 756C one of a few sites globally boasting both the familiar stepped δ 18 O and δ 13 C structure of the EOT and the primary biostratigraphic marker defining the base of the Oligocene. A series of potentially useful new calcareous nannofossil bioevents were identified that could help improve dating and correlation of this crucial interval. In this context, changes in calcareous nannofossil assemblages observed across EOT are interpreted in terms of modifications of paleoecological parameters that typically control the abundance and distribution of different taxa. Variations in sea surface temperature and nutrient availability are considered to be the most likely triggers for the calcareous phytoplankton changes observed across EOT. Specifically, our data suggest that increased nutrients in the mixed layer played a key role in shaping the late Eocene -early Oligocene calcareous nannofossil assemblages.

show abstract

Section: Figs 7-8supporting

confidence: 92%

Section: Paleoenvironmental Changes During the Late Eocene -Early Oli...mentioning

confidence: 99%

Section: Paleoenvironmental Changes During the Late Eocene -Early Oli...mentioning

confidence: 99%

Section: Paleoenvironmental Changes During the Late Eocene -Early Oli...mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Calcareous nannofossils across the Eocene-Oligocene transition at Site 756 (Ninetyeast Ridge, Indian Ocean): implications for biostratigraphy and paleoceanographic clues

Viganò¹,

Coxall²,

Holmström³

et al. 2023

nos

View full text Add to dashboard Cite

show abstract

Middle Eocene to early Oligocene biostratigraphy in the SW Neo-Tethys (Tunisia): Large-scale correlations using calcareous nannofossil events and paleoceanographic implications

Messaoud

Thibault

Aljahdali

et al. 2023

Journal of African Earth Sciences

View full text Add to dashboard Cite

Calcareous nannofossils across the Eocene-Oligocene transition: Preservation signals and biostratigraphic remarks from ODP Site 1209 (NW Pacific, Shatsky Rise) and IODP Hole U1411B (NW Atlantic Ocean, Newfoundland Ridge)

Viganò,

Westerhold,

Bown

et al. 2023

Palaeogeography, Palaeoclimatology, Palaeoecology

View full text Add to dashboard Cite

Integrated calcareous nannofossil and magnetostratigraphic record of ODP Site 709: Middle Eocene to late Oligocene paleoclimate and paleoceanography of the Equatorial Indian Ocean

Cited by 7 publications

References 64 publications

Calcareous nannofossils across the Eocene-Oligocene transition at Site 756 (Ninetyeast Ridge, Indian Ocean): implications for biostratigraphy and paleoceanographic clues

Calcareous nannofossils across the Eocene-Oligocene transition at Site 756 (Ninetyeast Ridge, Indian Ocean): implications for biostratigraphy and paleoceanographic clues

Middle Eocene to early Oligocene biostratigraphy in the SW Neo-Tethys (Tunisia): Large-scale correlations using calcareous nannofossil events and paleoceanographic implications

Calcareous nannofossils across the Eocene-Oligocene transition: Preservation signals and biostratigraphic remarks from ODP Site 1209 (NW Pacific, Shatsky Rise) and IODP Hole U1411B (NW Atlantic Ocean, Newfoundland Ridge)

Contact Info

Product

Resources

About