C. 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 SEIR MORB, and lavas from St. Paul and Amsterdam Islands, and initial ratios for lavas from the Kerguelen Archipelago and the Ninetyeast Ridge. The proposed field (Weis et al., 1993) for the plume is labeled "Southeast UMS." Data sources are as in Figure 5B.

To Table 1: Primary Site Time Estimates

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