Figure F47. Photomicrographs of cementation and alteration in the upper crystal vitric tuff (Unit 5). A. Matrix clays (Sample 200-1223A-3X-2, 71-73; plane-polarized light). B. Clays lining altered olivine (same sample as A). C. Green chloritized glass shard (same sample as A). D. Zeolite in a vesicle (Sample 200-1223A-3X-2, 82-84 cm).

Figure F47. Photomicrographs of cementation and alteration in the upper crystal vitric tuff (Unit 5). A. Matrix clays (Sample 200-1223A-3X-2, 71-73; plane-polarized light). B. Clays lining altered olivine (same sample as A). C. Green chloritized glass shard (same sample as A). D. Zeolite in a vesicle (Sample 200-1223A-3X-2, 82-84 cm).