Figure F40. Close-up photograph of coarse-grained highly altered Fe-Ti gabbro (Sample 176-735B-181R-2 [Piece 9C and 9D, 100-112 cm]; 1244 mbsf) showing alteration of olivine and pyroxene (dark grains), of orthopyroxene (brilliant crystals) and plagioclase (from fresh light-gray Ca-plagioclase to milky-white Na-rich species). Olivine and clinopyroxene are mostly altered to smectite + sulfide. Minor talc + oxide and chlorite form after olivine and orthopyroxene. Plagioclase shows variable coloration from dark gray to milky white when pseudomorphed by albite. Note veins of dark green smectites, particularly at the top of the photo (cut side of the core section).