Figure F282. Pyroxene in veins pseudomorphed by amphibole (Thin Section 37; Sample 312-1256D-197R-1; 3–6 cm; 1367.53 mbsf). A. Quartz + plagioclase + actinolite + small clinopyroxene + hornblende-rich amphibole vein (plane-polarized light; field of view [FOV] = 2.25 mm). B. Detail of A, showing plagioclase + quartz + small rounded clinopyroxene replaced by actinolite (plane-polarized light; FOV = 0.6 mm). C. Same as B; cross-polarized light.
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