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.