Figure F108. A. Photomicrograph showing detail of a black halo similar to that in Figure F107. Vesicle filled by celadonite and olivine phenocryst totally replaced by iron oxyhydroxides, minor celadonite, and later saponite (Sample 206-1256D-35R-3, 11-12 cm; field of view = 1.25 mm; plane polarized light). B. Photomicrograph showing celadonite filling a vesicle, interstitial voids, and veinlets within the blue-green dark zone of a mixed halo (Sample 206-1256D-16R-1, 81-83 cm; field of view = 1.25 mm; plane polarized light).

Figure F108. A. Photomicrograph showing detail of a black halo similar to that in Figure F107. Vesicle filled by celadonite and olivine phenocryst totally replaced by iron oxyhydroxides, minor celadonite, and later saponite (Sample 206-1256D-35R-3, 11-12 cm; field of view = 1.25 mm; plane polarized light). B. Photomicrograph showing celadonite filling a vesicle, interstitial voids, and veinlets within the blue-green dark zone of a mixed halo (Sample 206-1256D-16R-1, 81-83 cm; field of view = 1.25 mm; plane polarized light).