Figure F33. X-ray diffraction spectra and associated core photographs. Red ovals = analyzed zones. A. Green cement in aphyric basalt hyaloclastite of Unit VI (Sample 330-U1372A-13R-3, 0–2 cm). Secondary mineral assemblage is predominantly composed of Mg calcite, glauconite, and saponite. B. Infilled vesicles in aphyric basalt (Unit X, Sample 330-U1372A-16R-3, 32–34 cm). Secondary mineral assemblage is predominantly composed of Mg calcite, siderite, bannisterite, and nontronite. For both samples, a second analysis was performed after dissolution of carbonates with hydrochloric acid in order to obtain a better resolution for clay minerals.
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