Figure F19. A. Augite/plagioclase vs. CaO/Al₂O₃ for Leg 176 rocks. B. TiO₂ (wt%) vs. oxide (vol%) mode of Leg 176 rocks. Modes by point counting and chemical analysis by X-ray fluorescence on samples adjacent to the thin-section billets. Gabbronorite and oxide gabbro-norite include orthopyroxene-bearing gabbro and gabbronorite.