Figure 28. Time series from Site 1020 on the East Gorda Ridge, off Northern California (Fig. 20). SST data from Kreitz et al. (Chap. 10, this volume); Sequoia pollen data from Heusser et al. (Chap. 17, this volume); oxygen isotopes, CaCO3 and Corg from Lyle et al. (Chap. 11, this volume); biogenic silica from Kuroda et al. (Chap. 14, this volume). High Sequoia (redwood) abundance is associated with only the major interglacials, as marked by both isotopes and alkenone SST. High CaCO3 generally occurs in glacial periods, but lowest values lag the glacial-interglacial transition. There is a major transition in alkenone SST, CaCO3, and biogenic silica records occurring through MIS 12 and 11. Depth is shown in revised meters composite depth from Lyle et al. (Chap. 11, this volume).

Figure 28. Time series from Site 1020 on the East Gorda Ridge, off Northern California (Fig. 20). SST data from Kreitz et al. (Chap. 10, this volume); Sequoia pollen data from Heusser et al. (Chap. 17, this volume); oxygen isotopes, CaCO₃ and Corg from Lyle et al. (Chap. 11, this volume); biogenic silica from Kuroda et al. (Chap. 14, this volume). High Sequoia (redwood) abundance is associated with only the major interglacials, as marked by both isotopes and alkenone SST. High CaCO₃ generally occurs in glacial periods, but lowest values lag the glacial-interglacial transition. There is a major transition in alkenone SST, CaCO₃, and biogenic silica records occurring through MIS 12 and 11. Depth is shown in revised meters composite depth from Lyle et al. (Chap. 11, this volume).