Figure F13. X-ray diffractogram traces of samples from lithologic Unit I. Ill = illite; Ch/Ka = chlorite and/or kaolinite; Ch = chlorite; Qz = quartz; Fsp = feldspar; Hal = halite; and Clay = nonbasal clay-mineral reflection. Halite is from seawater. Samples from Cores 185-1149A-1H, 11H, and 12H are from monotonous background sediment. Sample 185-1149A-2H-1, 22-23 cm, is from a slightly indurated green clay lamina. Note the well-defined plagioclase peak at 3.18 Å in this diffractogram and that individual diffractograms are offset by 500 cps for clarity.