Figure F21. Compositional variation in bulk rocks identified as either Fe-Ti oxide bearing (open symbols) or Fe-Ti oxide free (closed symbols). Selected oxides are shown: TiO2, Fe2O3, and P2O5 as well as the element ratio Mg/(Mg + Fetotal). Note that the scale for the P2O5 variation goes from 0 to 5 wt%. The normative anorthite is the CIPW normative plagioclase composition. Data are from Shipboard Scientific Party (1999).