Figure F289. Veins in gabbros (Thin Section 71; Sample 312-1256D-215R-1, 84–88 cm; 1416.54 mbsf) (field of view = 4.5 mm). A. Vein of epidote + prehnite crosscutting pyroxene (replaced by hornblende) (plane-polarized light). B. Same as A; cross-polarized light. C. Epidote-titanite-prehnite vein with irregular boundaries (plane-polarized light). Wallrock plagioclase is replaced by an unidentified mineral (prehnite?) and epidote. D. Same as C; cross-polarized light.
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