Figure F46. A. Sample 176-735B-133R-5 (Piece 3, 113-116 cm): large crystal of olivine in fresh olivine gabbro showing irregular cracks lined with smectite and finely disseminated oxide. B. Sample 176-735B-94R-1 (Piece 1F, 81-85 cm): partly altered olivine crystal in olivine gabbro. Note core of fresh olivine rimmed by dark smectite, which, in turn, is rimmed with a mixture of talc, Mg-amphibole, and disseminated oxide. C. Sample 176-735B-92R-1 (Piece 6B, 60-62 cm): large olivine grain enclosing a clinopyroxene grain with excellent cleavage. Note abundance of irregular cracks in the olivine and their paucity in the pyroxene, and the total absence of alteration in the pyroxene. Scale bars = 1 mm.