Figure F32. Distribution of clay- and calcium carbonate-filled veins with depth (mbsf) in Hole 1136A. Note that we calculated the abundance of veins by summing the total thickness (vein width) of each vein type for each core divided by the meters of core actually recovered. Only 45 cm of brecciated volcanic glass, completely altered to black clay, was recovered from Unit 3. These rocks are crosscut by numerous fine zeolite-filled veinlets (see "Alteration and Weathering").