Figure 1--Sea-level fluctuations based on positions determined by Bloom and Yonekura (1985, 1990); Chappell and Shackleton (1986); and Ludwig et al. (1996). The positions are plotted on the deep-sea oxygen-isotropic proxy data of Shackleton (1987) and Labeyrie et al. (1987). Illustration courtesy of David Mallinson.