Figure F37. Photomicrographs of vein phenomena in Hole U1346A basalts. A. Conjugate veins (Thin Section 38; Sample 324-U1346A-11R-1, 34–35 cm). B. T-shaped vein filled with nontronite and polycrystalline calcites (Thin Section 59; Sample 324-U1346A-16R-2, 30–31 cm). C. Vesicle cut by veins and filled with nontronite, Fe hydroxide, and cross-fibrous calcites (Thin Section 47; Sample 324-U1346A-13R-1, 102–105 cm). D. En echelon veins (Thin Section 50; Sample 324-U1346A-14R-2, 36–37 cm). A and D are at 2.5x magnification, C and B are at 5x magnification. Plane-polarized light.
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