Figure F38. Visual estimation of clinopyroxene alteration in thin sections from Hole 735B vs. depth. A. Average alteration of pyroxene. B. Percentage of secondary clinopyroxene in the secondary mineral assemblage. C. Percentage of brown amphibole after clinopyroxene in the secondary mineral assemblage. D. Percentage of green amphibole after clinopyroxene in the secondary mineral assemblage.