The results of the biogenic opal analyses are presented in Table 1 and plotted vs. the meters composite depth (mcd) scale in Figure 1 (see the "Explanatory Notes" chapter in Lyle, Koizumi, Richter, et al. [1997] for a discussion of the mcd scale). To facilitate graphical comparison between sites, the data were also converted to the time domain (Fig. 2) using the shipboard magneto- and biostratigraphic datum events (Lyle, Koizumi, Richter, et al., 1997) compiled and presented in Ravelo et al. (1997). Although Sites 1010 and 1021 have analyzed opal records that extend back to 13 Ma, only the opal record for the past 8 Ma is shown in Figure 2. All analyzed opal data are shown in Figure 1 and presented in Table 1.