Figure F10. 208Pb/204Pb vs. 206Pb/204Pb showing measured data points for basalts recovered from the Kerguelen Plateau and Broken Ridge. Shown for comparison are measured fields for Southeast Indian Ridge (two subfields: the field extending to high ratios includes samples near the Amsterdam-St. Paul platform), lavas from St. Paul and Amsterdam Islands (diagonal hatching), and initial ratios for lavas from the Kerguelen Archipelago (shaded area) and the Ninetyeast Ridge (fields labeled NER and NER 216). Data sources are given in Figure F9.