Figure F2. Evolution of oxygen stable isotopes (δ18O) through the Cenozoic and related major phases of climate change (modified from Zachos et al., 2001b, 2008). Yellow boxes = time slices of interest for the PEAT program, green and blue boxes = ODP legs and sites previously drilled in the equatorial Pacific region; these additional sites will be used with the PEAT sites to obtain a nearly continuous Cenozoic record of the equatorial Pacific region. VPDB = Vienna Peedee belemnite. Oi-1 = Oligocene isotopic Event 1, Mi-1 = Miocene isotopic Event 1 (described in Miller et al., 1991). ETM2 = Eocene thermal maximum 2.
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