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Figure F11. X-ray diffractograms of selected sediment, Site U1371. A. Characteristic diffraction peaks for quartz (Q), cristobalite (C), chlorite (Cl), illite (I), phillipsite (P), and halite (H) in Unit I. Peaks are labeled twice when the intensities from the upper (black) and lower (red) parts of the unit showed significant differences. B. Diffraction patterns illustrating differences among variable XRD mineralogy in samples from the upper (black) and lower (red) parts of Unit II. Notable changes in minerals common to the intervals (illite, cristobalite, quartz, and phillipsite) and unique occurrence of red-brown to yellow-brown semiopaque oxyhydroxides (RSO) distinguish the two patterns.

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