Figure F123. Photomicrograph showing intensively altered basalt with coalescing vugs filled with successive minor colorless phyllosilicate, iron oxyhydroxides, celadonite, and quartz. Primary clinopyroxene is replaced by a colorless phyllosilicate and iron oxyhydroxides (Sample 206-1256D-57R-3, 0-1 cm). A. Field of view = 10 mm; plane polarized light. B. Detail of a vug in A (field of view = 1.25 mm; plane polarized light). C. Same area as B (field of view = 1.25 mm; cross polarized light).

Figure F123. Photomicrograph showing intensively altered basalt with coalescing vugs filled with successive minor colorless phyllosilicate, iron oxyhydroxides, celadonite, and quartz. Primary clinopyroxene is replaced by a colorless phyllosilicate and iron oxyhydroxides (Sample 206-1256D-57R-3, 0-1 cm). A. Field of view = 10 mm; plane polarized light. B. Detail of a vug in A (field of view = 1.25 mm; plane polarized light). C. Same area as B (field of view = 1.25 mm; cross polarized light).