Figure F14. A. Variations of Zr/Ba vs. Ba for Holes 1152A and 1152B basaltic glass and whole-rock Southeast Indian Ridge (SEIR) lavas dredged between 123°E and 133°E. TP = Transitional Pacific; PRT = propagating rift tip. B. Variations of Na₂O/TiO₂ vs. MgO for Holes 1152A and 1152B basaltic glass and whole-rock samples compared with Indian- and Pacific-type MORB fields defined by zero-age SEIR lavas dredged between 123°E and 133°E. Dashed line separates Indian- and Pacific-type zero-age SEIR basalt glass.