Figure F14. Veins and cataclastic zones in olivine gabbro (Thin Section 13; Sample 345-U1415I-2R-1, 25–31 cm). A, B. Prehnite (Preh) veins with tension gashes cutting highly altered olivine gabbro. C, D. Prehnite replacing comminuted plagioclase (Pl) in cataclasite. Cpx = clinopyroxene, Ol = olivine. A and C are under plane-polarized light; B and D are under crossed polars.
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