Stable isotope ratios of benthic and planktonic foraminifera from Miocene to Pliocene sediments of DSDP Hole 7-62A on the Eauripik Rise, Pacific Ocean (Table 1) ...

• Main Authors: Resig, Johanna M, Kroopnick, Peter M
• Format: Dataset
• Language: English
• Published: PANGAEA 1983
• Subjects: DEPTH, sediment/rock; AGE; Sample code/label; Epoch; Planktic foraminifera zone; Globigerinoides sacculifer, δ13C; Globigerinoides sacculifer, δ18O; Temperature, calculated; Globorotalia tumida, δ13C; Globorotalia tumida, δ18O; Streptochilus globulosum, δ13C; Streptochilus globulosum, δ18O; Foraminifera, benthic δ13C; Foraminifera, benthic δ18O; Siphouvigerina sp., δ13C; Siphouvigerina sp., δ18O; Uvigerina spp., δ13C; Uvigerina spp., δ18O; Drilling/drill rig; DSDP/ODP/IODP sample designation; Isotope ratio mass spectrometry; Calculated from stable oxygen isotopes; Leg7; Glomar Challenger; Deep Sea Drilling Project DSDP; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.682292; https://doi.pangaea.de/10.1594/PANGAEA.682292

Oxygen and carbon isotope analyses show that the biserial forarniniferal genus Streptochilus, which was originally described from pelagic sediments on the Eauripik Rise and Ontong Java Plateau, lived deep in the upper water column within the oxygen minimum layer. The species of Streptochilus average from 4 to 19% of the foraminiferal assemblages in which benthic forms compose less than 1 or 2%. Specimens of Streptochilus are selectively dissolved when in contact with the bottom water mass. Their rapid evolutionary turnover of less than a few million years and their wide areal distribution in the equatorial Indo-Pacific are indicative of planktonic foraminifera. Aside from usefulness of the species of Streptochilus as stratigraphic indices, these Neogene biserial planktonic foraminifera are potential indices of paleoceanographic stratification. ... : Ages are approximated, Temperature calculation: T (∞C) = 16.5-4.3 * (deltaO18 O3) + 1.4 * (deltaO18 O3)**2, based on the revised paleotemperature equation of Epstein et al. (1953) ...