Figure F16. Photomicrographs of thin sections and close-up photographs of altered basalts. A. Saponite and celadonite replacing the groundmass (plane-polarized light). B. Saponite partly filling a vesicle (plane-polarized light). C. Celadonite filling a vein (interval 322-C0012A-53R-2, 6–16 cm). D. Saponite and celadonite filling a vein (cross-polarized light).
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