Calcium carbonate contents and oxygen and carbon isotopic compositions of planktic and benthic foraminifera in sediments at DSDP Site 85-575, supplement to: Thomas, Ellen; Vincent, Edith (1987): Equatorial Pacific deep-sea benthic foraminifera: Faunal changes before the middle Miocene polar cooling. Geology, 15(11), 1035-1039

• Main Authors: Thomas, Ellen, Vincent, Edith
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1987
• Subjects: DEPTH, sediment/rock; AGE; Calcium carbonate; Oridorsalis umbonatus, δ18O; Oridorsalis umbonatus, δ13C; Globoquadrina venezuelana, δ18O; Globoquadrina venezuelana, δ13C; Drilling/drill rig; Leg85; Glomar Challenger; Deep Sea Drilling Project DSDP; Antarctic; The Antarctic; Pacific; Edith; Antarc*; Ice cap
• Online Access: https://dx.doi.org/10.1594/pangaea.712912; https://doi.pangaea.de/10.1594/PANGAEA.712912

Data on the composition of benthic foraminiferal faunas at Deep Sea Drilling Project Site 575 in the eastern equatorial Pacific Ocean were combined with benthic and planktonic carbon- and oxygen-isotope records and CaCO3 data. Changes in the composition of the benthic foraminiferal faunas at Site 575 predated the middle Miocene period of growth of the Antarctic ice cap and cooling of the deep ocean waters by about 2 m.y., and thus were not caused by this cooling (as has been proposed). The benthic faunal changes may have been caused by increased variability in corrosivity of the bottom waters, possibly resulting from enhanced productivity in the surface waters. : On 2017-09-25 it was noted, that ages were given as 5 ka instead of 5 Ma. The numbers were recalculated (x1000) to fit to the unit.