Figure F22. Ratios of Zr/Ba, Zr/Sr, Ti/Ba, and Ti/Sr vs. MgO content. At a given MgO content, these ratios increase in the order: Nintoku Seamount < Mauna Kea Volcano < Suiko Seamount (data from Kirkpatrick et al., 1980; Yang et al., 1996, S. Huang and F.A. Frey, unpubl. data; M. Regelous et al., unpubl. data).