Variability in downcore elemental concentrations is observed in all elements analyzed. Because the Ti record (Fig. F1A) illustrates typical trends seen in downcore concentrations of other terrigenous metals, such as Fe and Al, only Ti concentrations are plotted. Ti concentrations change considerably near the Eocene/Oligocene boundary coincident with sharp lithologic changes from claystone to glauconite sands to pelagic carbonates, with higher concentrations of Ti in the Eocene and older samples. Phosphorus concentrations (Fig. F1B) and Ba concentrations (Fig. F1C) increase by a factor of two before and decrease similarly after the Eocene-Oligocene transition (gray-shaded area in Fig. F1C). Variability after the Eocene-Oligocene transition appears to be at a higher frequency than that observed prior to the transitional time. This is also observed in the P/Ti (Fig. F2A) and Ba/Ti (Fig. F2B) records. During the Eocene, P and Ti appear to be increasing and decreasing in tandem, suggesting that some of the P may be of terrigenous origin rather than biologically related. This is further supported by the nearly constant P/Ti (Fig. F2A) and Ba/Ti (Fig. F2B) ratios observed during the Eocene. The absolute values of the P/Ti and Ba/Ti ratios change considerably before and after the Eocene-Oligocene transition. This is related to differences in the average composition of the different rock types, for example, carbonates (P/Ti = 1.0) (Faure, 1998) vs. deep-sea clay (P/Ti = 0.33) (Faure, 1998).
Ratios of Fe, Al, and Ti can provide information about general changes in metal sources. The Al/Ti (Fig. F2C) ratios are variable downcore, fluctuating between values similar to basalt or oceanic crust (Al/Ti 
9) (Taylor and McLennan, 1985) and continental sources (average continental crust Al/Ti = 15.6) (Taylor and McLennan, 1985), whereas Fe/Ti ratios are similar to those observed for average continental crust (Fe/Ti = 13.1) (Taylor and McLennan, 1985). In general, more variability is observed in both records following the Eocene-Oligocene transition.
