Figure F10. A–C. Thin section images of a polymict volcanic breccia clast containing vesicular flow-banded glassy volcanic rock in a silicified matrix, Site C0013. Primary volcanic glass forms the ground mass of the pumice clasts (extinct in cross polars in B and C). Quartz and opaque sulfide mineralization follow stretched vesicles. Secondary illite and Mg chlorite predominate over primary phyllosilicates.
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