Figure F9. Oxygen isotope and carbonate time series across the Eocene/Oligocene boundary at Site 1218, ODP Leg 199 (Coxall et al., 2005). Oxygen isotope changes are in step with carbonate changes. The transition was accomplished in two steps of ~40 k.y. length, separated by a pause of ~100 k.y. MAR = mass accumulation rates. VPDB = Vienna Peedee belemnite.
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