Figure F18. A. Dark green amphibole veins cutting gabbro (interval 305-U1309D-294R-2, 30–44 cm). B. Gabbro cut by parallel set of dark green amphibole veins (interval 305-U1309D-160R-4, 0–23 cm). The density of such sets locally approaches that of a foliation. Note development of corona texture in the alteration halo of these veins.
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