Figure F31 (continued). B. Thin section photomicrographs of evolved tuff: (a) light green tuff composed of a formerly glassy matrix with pyroxene and feldspar crystals (8R-4, 45–48 cm; TS83; 1136.45–1136.48 mbsf); (b) intercalated white and gray tuff with a crystal-rich and vitric-rich layers. The crystal-rich layer is composed of plagioclase, clinopyroxene, and amphibole (8R-1, 59–62 cm; TS82; 1133.59–1133.62 mbsf); (c) dark gray tuff composed of altered glassy shards, plagioclase, and opaques (7R-7, 71–73 cm; TS81; 1130.71–1130.73 mbsf); (d) stratified brown tuff composed of altered glass shards, plagioclase, and opaques (19R-1, 81–84 cm; TS95; 1233.81–1233.84 mbsf). (Continued on next page.)
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