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Figure F45. Photomicrograph of chlorite and calcite veins and their relationships to groundmass alteration, Hole U1349A (Thin Section 235; Sample 324-U1349A-12R-3, 32–34 cm). 1 = alteration of olivine to iddingsite and formation of clay minerals ± Fe oxyhydroxides around vesicle, 2 = infilling of vesicles with calcite, 3 = chlorite vein, 4 = calcite veins. Plane-polarized light.

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