Figure 26 | Table of Contents

Figure 25. A. Variations in Zr/Ba vs. Ba (in parts per million) content of basaltic glass dredged from 0- to 7-Ma seafloor within and east of the Australian Antarctic Discordance (ADD) (D. Pyle and D. Christie, unpubl. data). MORB = mid-ocean-ridge basalt; PRT = propagating rift tip lavas. B. Variations in Na₂O/TiO₂ vs. MgO (in weight percent) content of basaltic glass dredged from 0- to 7-Ma seafloor within and east of the AAD (D. Pyle and D. Christie, unpubl. data).