Representative core close-up photographs. Figure 10 . Representative layered sections of the Leg 176 core. Figure 11 . Downhole distribution of secondary phases in Hole 735B, related to the variation in total rock alteration with depth.
Data are from thin section observations.
Figure 12 . A. Distribution of total veins by percentage of core in gabbroic rocks recovered during Legs 118 and 176. Below 1250 mbsf, felsic veins are rare. D. Distribution of amphibole veins by percentage of core. Below 600 mbsf, amphibole veins are rare.