Figure F6. Time plot of delta18O, the estimated winter and summer sea-surface temperatures and their differences, and the abundances of warm-water and deep-dwelling groups. Note distinct transitions of these parameters after ~0.9 Ma. FO = first occurrence, LO = last occurrence, D = dextral, S = sinistral. MIS = marine isotope stage.

Figure F6. Time plot of

¹⁸O, the estimated winter and summer sea-surface temperatures and their differences, and the abundances of warm-water and deep-dwelling groups. Note distinct transitions of these parameters after ~0.9 Ma. FO = first occurrence, LO = last occurrence, D = dextral, S = sinistral. MIS = marine isotope stage.