Figure F6. Compilation of benthic foraminiferal oxygen isotopic composition from 34 DSDP and ODP sites plotted vs. age (from Zachos et al., 1993; J. Zachos et al., unpubl. data). PETM = Paleocene-Eocene Thermal Maximum, K/T = Cretaceous/Tertiary boundary, MME = mid-Maastrichtian event. OAE = Oceanic Anoxic Event.