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Figure F9. Plots of paleosecular variation and paleolatitude uncertainties. A. Mean and 95% paleolatitude uncertainties at 50°S as a function of the number of temporally independent flow groups based on two recent paleosecular variation models. B. Number of independent flow groups from selected DSDP/ODP sites. Hawaiian-Emperor data from DSDP Leg 55 (Kono, 1980) and ODP Legs 145 (Tarduno and Cottrell, 1997) and 197 (Tarduno et al., 2003). Solid squares for Suiko and Detroit Seamounts indicate total number of flow units, including volcaniclastic units. Kerguelen-Ninetyeast Ridge data from ODP Legs 120 (Inokuchi and Heider, 1992), 121 (Klootwijk et al., 1991), and 183 (Antretter et al., 2002). Pacific atoll/guyot data from ODP Legs 143 (Tarduno and Sager, 1995) and 144 (Nakanishi and Gee, 1995). Ontong Java Plateau data from ODP Legs 130 (Mayer and Tarduno, 1993) and 192 (Riisager et al., 2003). C. Paleolatitude uncertainties vs. flow group numbers, based on same references as B.

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