Figure F16. A. Correlation of percent ash (blue line) in the marine sediment record from Site 1094 and sodium concentration (dashed red line) in the Vostok ice core. B. Resulting comparison of 18O of N. pachyderma (green line), inferred temperatures from the Vostok ice core (dashed magenta line) (Petit et al., 1999), and lithic concentration at Site 1094 (black line) (after Kanfoush et al., 2002).