de.pangaea.dataset928159 und dataset PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact 2026-02-26T01:08:48Z https://doi.pangaea.de/10.1594/PANGAEA.928159 2026-01-28T12:00:23 publication https://doi.org/10.1594/PANGAEA.928159 Vahlenkamp, Maximilian

mvahlenkamp@marum.de

https://orcid.org/0000-0002-2455-5719 information author D'haenens, Simon

Simon.Dhaenens@ees.kuleuven.be

https://orcid.org/0000-0003-1248-3188 information author De Vleeschouwer, David

ddevlees@uni-muenster.de

https://orcid.org/0000-0002-3323-807X information author Hull, Pincelli M

pincelli.hull@yale.edu

https://orcid.org/0000-0001-8607-4817 information author Zachos, James C

jzachos@ernerald.ucsc.edu

https://orcid.org/0000-0001-8439-1886 information author Agnini, Claudia

claudia.agnini@unipd.it

https://orcid.org/0000-0001-9749-6003 information author Pälike, Heiko

hpaelike@marum.de

https://orcid.org/0000-0003-3386-0923 information author PANGAEA

info@pangaea.de

https://www.pangaea.de/ information publisher tableDigital To come to a coherent middle Eocene timescale for the Atlantic, we re-evaluate the astrochronology of chrons C20n/C20r at International Ocean Discovery Program (IODP) Expedition 342 Sites U1408 and U1410 off Newfoundland. Based on the stratigraphic work of Cappelli et al., 2019 a two-site-composite for the chrons C20n and C20r (~42-46 Ma) was constructed by transferring U1410 samples to the U1408 depth-scale. We then used previously published (U1410; Vahlenkamp et al., 2018) and new (U1408) benthic and bulk stable isotopes (d^13^C and d^18^O) to derive a revised eccentricity-tuned astrochronology for the Expedition 342 composite. The astrochronologic tuning demonstrates that the contourite deposition (reflected by the Ca/Fe ratio) at the Newfoundland Ridge occurred under an amplified climatic response to obliquity during C20n and C20r – with intermittent "astronomical flickering" to precession. To further test our astrochronology we refined nannofossil datums at Site 1263 to compare with those at Site U1410 (Cappelli et al., 2019). The new chronology synchronizes time scales across the Atlantic basin. A robust middle Eocene chronology for the North Atlantic is indispensable because Expedition 342 sites host the highest-resolution middle Eocene benthic stable isotope records for this time interval. completed IODP Integrated Ocean Drilling Program / International Ocean Discovery Program ODP Ocean Drilling Program theme 1995-01-01 creation PANGAEA

info@pangaea.de

https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-4.0: Creative Commons Attribution 4.0 International textTable und geoscientificInformation -49.785805 2.77948 -28.53283 41.438315 2003-03-29T15:15:00 2003-04-03T13:30:00 This dataset has been carefully reviewed and curated in accordance with PANGAEA's exceptionally high quality standards. However, due to discontinued communication from the authors' side, it did not receive the usual formal approval by the authors and therefore lacks final scientific validation. application/zip unknown https://doi.pangaea.de/10.1594/PANGAEA.928159?format=zip download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data.