Figure F46. Abundances of Na2O, K2O, TiO2, CaO, Al2O3, and Zr vs. MgO content for lavas from Koko, Nintoku, and Suiko Seamounts. All trends show an inverse correlation except for CaO in Nintoku Seamount lavas with <5 wt% MgO. Note that some lavas from Suiko Seamount contain up to 30 wt% MgO.