Figure F20. Stable oxygen and carbon isotope records of benthic foraminifer Cibicidoides mundulus (C.mund) for Sites 1263, 1265, and 1266, and of bulk fragments of planktonic foraminifer fragments (PF.frag.) for Site 1262 plotted as a function of age for the period 30–35 Ma. The carbonate fossils of Site 1262 were completely dissolved below the Eocene/Oligocene boundary at 33.7 Ma (Liu et al., 2004b). The earliest Oligocene Glacial Maximum (EOGM) spans the interval 33.2–33.6 Ma for all sites. The age model is based on the onboard calcareous nannofossil and foraminifer stratigraphies combined with the magnetic stratigraphy (Zachos, Kroon, Blum, et al., 2004). VPDB = Vienna Peedee belemnite.