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Figure F22. X-ray diffraction spectra and associated core photograph (Sample 330-U1373A-2R-3, 111–116 cm). Material from several altered olivine phenocrysts (red circles) was combined for a single XRD analysis. The secondary mineral assemblage is predominantly composed of hematite, montmorillonite, and bannisterite. Minor amounts of Mg calcite may also be present as small peaks (not labeled). The presence of augite in the X-ray pattern is due to inclusion of the adjacent groundmass during sample extraction.

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