10.1594/PANGAEA.961095Taylor, Victoria EVictoria ETaylor0000-0002-6909-1575Wilson, Paul APaul AWilson0000-0001-6425-8906Bohaty, Steven MSteven MBohatyMeckler, Anna NeleAnna NeleMeckler0000-0002-7225-8276PANGAEA2023Clumped isotope thermometryDeep ocean temperaturesEastern Equatorial Pacific OceanEocene-Oligocene TransitionGroupReplicatesAGEAgeAge, maximum/oldAge, minimum/youngCibicidoides spp., δ13CCibicidoides spp., δ18OSpeciesΔ47Δ47, standard deviationΔ47, standard errorDeep water temperatureConfidence intervalComposite CoreAstronomically calibrated age model modified after Westerhold et al. (2014)Weighted averageI-CDES scale (Bernasconi et al., 2021)Calculated using Meinicke et al. (2020) calibration updated to the I-CDES scale by Meinicke et al. (2021)Exp320Joides ResolutionIntegrated Ocean Drilling Program / International Ocean Discovery Program (IODP)Dataset10.1594/PANGAEA.96109410.1029/2022PA00449310.1594/PANGAEA.956848182 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset contains clumped isotope, and stable carbon and oxygen isotope data from benthic foraminifera from IODP Expedition 320 Site U1334 in the eastern equatorial Pacific Ocean. The clumped isotope data were used to reconstruct deep ocean temperatures from ~35 Ma to ~33 Ma, across the Eocene-Oligocene Transition. Data in this dataset are provided as averaged stable isotope and temperature data, whereby each individual temperature represents the average of a minimum of 30 measurements of aliquots of monospecific benthic foraminifera sourced from multiple (n = 11-34) closely spaced samples.-131.9737.999European Research Councilhttps://doi.org/10.13039/501100000781638467Climate change across Cenozoic cooling steps reconstructed with clumped isotope thermometry (C4T)Natural Environment Research Councilhttps://doi.org/10.13039/501100000270NE/K006800/1Natural Environment Research Councilhttps://doi.org/10.13039/501100000270NE/K008390/1Natural Environment Research Councilhttps://doi.org/10.13039/501100000270NE/K014137/1Natural Environment Research Councilhttps://doi.org/10.13039/501100000270NE/L002531/1SPITFIRE - the Southampton Partnership for Innovative Training of Future Investigators Researching the EnvironmentRoyal Societyhttps://doi.org/10.13039/501100000288Wolfson_Merit_AwardThe Research Council of Norwayhttps://doi.org/10.13039/501100005416314371