The Eocene−Oligocene transition in Nanggulan, Java: lithostratigraphy, biostratigraphy and foraminiferal stable isotopes

Coxall, Helen; Jones, Tom Dunkley; Jones, Amy; Lunt, Peter; MacMillan, Ian; Marliyani, Gayatri Indah; Nicholas, C. J.; O'Halloran, A.; Piga, Emanuela; Sanyoto, Prihardjo; Rahardjo, Wartono; Pearson, Paul Nicholas

doi:10.1144/jgs2021-006

Cited by 3 publications

(1 citation statement)

References 64 publications

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“…Unfortunately, the surface dwelling foraminifera T. ampliapertura and the shallow genera Pseudohastigerina and Globoturborotalita, which have provided EOT SST signals in previous studies (e.g., Coxall et al, , 2021Pearson et al, 2008;Wade et al, 2012; see also Figure S4 in Supporting Information S1) were rare in the assemblages, as suggested by the species counts for the late Eocene of Site U1411 (Holmström, 2016).…”

Section: Planktonic Foraminiferamentioning

confidence: 91%

North Atlantic Temperature Change Across the Eocene‐Oligocene Transition From Clumped Isotopes

Kocken,

Nooteboom,

van der Veen

et al. 2024

Paleoceanog and Paleoclimatol

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The Eocene‐Oligocene transition (EOT) (∼34 Ma) is marked by the rapid development of a semi‐permanent Antarctic ice‐sheet, as indicated by ice‐rafted debris and a 1–1.5‰ increase in deep sea δ18O. Proxy reconstructions indicate a drop in atmospheric CO2 and global cooling. How these changes affected surface ocean temperatures in the North Atlantic and ocean water stratification remains poorly constrained. In this study, we apply clumped‐isotope thermometry to well‐preserved planktonic foraminifera, that are associated with lower mixed‐layer to subthermocline dwelling depths from the drift sediments at international ocean discovery program Site 1411, Newfoundland, across four intervals bracketing the EOT. The thermocline/lower mixed‐layer dwelling foraminifera record a cooling of 1.9 ± 3.5 K (mean ± 95% CI) across the EOT. While the cooling amplitude is similar to previous sea surface temperature (SST) reconstructions, absolute temperatures (Eocene 20.0 ± 2.9°C, Oligocene 18.0 ± 2.2°C) appear colder than previous organic proxy reconstructions for the northernmost Atlantic extrapolated to this location. We discuss seasonal bias, recording depth, and appropriate consideration of paleolatitudes, all of which complicate the comparison between SST reconstructions and model output. Our subthermocline dwelling foraminifera record a larger cooling across the EOT (Eocene 19.0 ± 3.5°C, Oligocene 13.0 ± 3.2°C, cooling of 5.5 ± 4.6 K) than foraminifera from the thermocline/lower mixed‐layer, consistent with global cooling and an increase in ocean stratification which may be related to the onset or intensification of the Atlantic meridional overturning circulation.

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Section: Planktonic Foraminiferamentioning

confidence: 91%

North Atlantic Temperature Change Across the Eocene‐Oligocene Transition From Clumped Isotopes

Kocken,

Nooteboom,

van der Veen

et al. 2024

Paleoceanog and Paleoclimatol

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Controls on Early Miocene carbonate and siliciclastic deposition in eastern Java and south Makassar Straits, Indonesia

Luan

Lunt

2022

Journal of Asian Earth Sciences

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Debris-slides, olistoliths and turbidites: keys to understanding the tectonostratigraphic affinities of a terrane block in a young orogenic belt, Timor-Leste

Nano,

Haig,

Fraga

et al. 2023

JGS

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Timor lies at the centre of a rapidly evolving orogenic belt. Matebian Range, one of its largest mountains, was previously mapped as Lower Miocene neritic Cablac Limestone and regarded as allochthonous (viz. Banda Terrane). New analyses have demonstrated a disjunct stratigraphy, extending from the Lower Jurassic to lowest Miocene and encompassing neritic to abyssal strata. Positioning each stratigraphic unit (six new) on a time vs. bathymetry plot and identifying clast types in conglomerates and turbidites allows reconstruction of changes in provenance to depo-centres through time. Terrane progression from the northern margin of Gondwana to the southern Sundaland margin (Asia) and then back to the northwest margin of the Australian continent is indicated involving progressive amalgamation and rifting and substantial episodes of uplift, particularly during the Middle Eocene and the Late Oligocene. The youngest unit (Late Oligocene–earliest Miocene) was deposited adjacent a rapidly rising hinterland (southern Sundaland) very different from that on the coeval Australian margin. The study provides a model for the tectonostratigraphic reconstruction of limestone-dominated mountains in young orogenic belts and demonstrates the importance of using sedimentary clasts in mass-flow deposits to interpret ages and depositional environments of reworked material and to stitch together tectonostratigraphic pathways through time. Supplementary material: https://doi.org/10.6084/m9.figshare.c.6852387

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The Eocene−Oligocene transition in Nanggulan, Java: lithostratigraphy, biostratigraphy and foraminiferal stable isotopes

Cited by 3 publications

References 64 publications

North Atlantic Temperature Change Across the Eocene‐Oligocene Transition From Clumped Isotopes

North Atlantic Temperature Change Across the Eocene‐Oligocene Transition From Clumped Isotopes

Controls on Early Miocene carbonate and siliciclastic deposition in eastern Java and south Makassar Straits, Indonesia

Debris-slides, olistoliths and turbidites: keys to understanding the tectonostratigraphic affinities of a terrane block in a young orogenic belt, Timor-Leste

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