Figure 11. Coccolith measurements from an Early Pleistocene (1.8-1.6 Ma) time-slice, as illustrated in Figure 13a and 13c of Knappertsbusch et al. (1997). The diagrams include samples DSDP 572A-3-4, 80 cm (Equatorial Pacific), DSDP 366A-3-5, 60 cm; V16-205, 779 cm and ME69-196, 471 cm (North Atlantic); DSDP 251-6-2, 110 cm and DSDP Site 236-3-1, 120 cm (Indian Ocean) (Table 1). The positions of morphotype modes are indicated as red squares. The line separates coccoliths of morphocline A (upper figure, including morphotypes S, I, and L) from coccoliths of morphocline B (lower figure, including morphotypes A and B). The equation of the separation line is Y = 2.0 X + 17.946 (X denotes the coccolith diameter in µm, and Y the number of elements in the distal shield).