(Table 1) 87Sr/86Sr ratios and ages of DSDP Site 144A samples ...

• Main Authors: Wilson, Paul A, Norris, Richard D, Cooper, Matthew J
• Format: Dataset
• Language: English
• Published: PANGAEA 2002
• Subjects: AGE; Sample code/label; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error; Age, maximum/old; Age, minimum/young; Drilling/drill rig; DSDP/ODP/IODP sample designation; Mass spectrometer VG Sector 54; Calculated; Leg14; Glomar Challenger; Deep Sea Drilling Project DSDP; Methane hydrate
• Online Access: https://dx.doi.org/10.1594/pangaea.713542; https://doi.pangaea.de/10.1594/PANGAEA.713542

Glassy Turonian foraminifera preserved in clay-rich sediments from the western tropical Atlantic yield the warmest equivalent d18O sea-surface temperatures (SSTs) yet reported for the entire Cretaceous-Cenozoic. We estimate Turonian SSTs that were at least as warm as (conservative mean ~30 °C) to significantly warmer (warm mean ~33 °C) than those in the region today. However, if independent evidence for high middle Cretaceous pCO2 is reliable and resulted in greater isotopic fractionation between seawater and calcite because of lower sea-surface pH, our conservative and warm SST estimates would be even higher (32 and 36°C, respectively). Our new tropical SSTs help reconcile geologic data with the predictions of general circulation models that incorporate high Cretaceous pCO2 and lend support to the hypothesis of a Cretaceous greenhouse. Our data also strengthen the case for a Turonian age for the Cretaceous thermal maximum and highlight a 20-40 m.y. mismatch between peak Cretaceous-Cenozoic global warmth and ... : Supplement to: Wilson, Paul A; Norris, Richard D; Cooper, Matthew J (2002): Warming the fuel for the fire: Evidence for the thermal dissociation of methane hydrate during the Paleocene-Eocene thermal maximum. Geology, 30(7), 1067-1070 ...