Improved resolution of the Pleistocene extinction level of Stylatractus universus Hays (Radiolaria) in ODP Hole 745B, Kerguelen Plateau

摘要

A combination of high resolution sampling and reevaluation of the "extinction" of the Pleistocene radiolarian, Stylatractus universus Hays, has resulted in precise placement of the .425 Ma datum at 24.8-24.4 mbsf in the siliceous sediment section recovered by ODP from Kerguelen Plateau Site 745. This reevaluation reconciles earlier differences between diatom and radiolarian stratigraphies of the Brunhes section of the sediments.