Figure 2. Biogenic opal concentrations vs. age for a latitudinal transect of seven Leg 167 sites along the California margin. The sites are plotted from south (bottom plot) to north. Note that Sites 1010 and 1021 contain biogenic opal records that extend to 13 Ma (only the portion of the record from 8 Ma to the present is shown in this figure). The entire analyzed opal data sets for Sites 1010 and 1021 are shown vs. depth in Figure 1 and presented in Table 1. Depth-to-age conversions were made using the shipboard magneto- and biostratigraphic datum events (Lyle, Koizumi, Richter, et al., 1997) compiled and presented in Ravelo et al. (1997).

Figure 2. Biogenic opal concentrations vs. age for a latitudinal transect of seven Leg 167 sites along the California margin. The sites are plotted from south (bottom plot) to north. Note that Sites 1010 and 1021 contain biogenic opal records that extend to 13 Ma (only the portion of the record from 8 Ma to the present is shown in this figure). The entire analyzed opal data sets for Sites 1010 and 1021 are shown vs. depth in Figure 1 and presented in Table 1. Depth-to-age conversions were made using the shipboard magneto- and biostratigraphic datum events (Lyle, Koizumi, Richter, et al., 1997) compiled and presented in Ravelo et al. (1997).