Figure F2. Example XRD profiles of six Site 1068 breccia matrix samples. A. Base of lithostratigraphic Unit II (851.55 mbsf). B. Subunit IVA (858.78 mbsf). C. Anomalous brown horizon within Subunit IVB (868.01 mbsf). I = peak intensity. Mineral identification is labeled above the corresponding peak. Note the difference in intensity scale between A-C and D-F, Ch = chlorite, Cl = expandable clays, I = illite, B = boehmite, Q = quartz, P = plagioclase, Ca = calcite, H = hornblende, and Ap = apatite. cps = counts per second. D. Subunit IVB (876.94 mbsf). E. Subunit IVC (890.08 mbsf). F. Subunit IVC (893.13 mbsf). An = analcime, S = serpentine, And = andradite.