Figure F9. Raw benthic oxygen isotopic data (Zachos et al., 2001) for the last 40 m.y. (and a smoothed version of the same data—a line through points at 200-k.y. intervals, least-squares fit to a five-point running mean) compared with observations of the glacial state of the Antarctic Peninsula, from onshore evidence and from ODP Leg 178. Timescale from Berggren et al. (1995). IRD = ice-rafted detritus.

Figure F9. Raw benthic oxygen isotopic data (Zachos et al., 2001) for the last 40 m.y. (and a smoothed version of the same data—a line through points at 200-k.y. intervals, least-squares fit to a five-point running mean) compared with observations of the glacial state of the Antarctic Peninsula, from onshore evidence and from ODP Leg 178. Timescale from Berggren et al. (1995). IRD = ice-rafted detritus.