Figure F18. A. Fresh lithic arenite of Unit II, showing abundant porphyry and vitrophyre rock fragments. The upper left part of this section is occupied by a sideromelane fragment (Sidm) with abundant bubble-shaped vesicles (thin section from Sample 195-1201D-1R-CC, 14-17 cm [86.82 mbsf]). B. Fresh siltstone of Unit II dominated by bubble-wall glass shards (Sh) and infrequent plagioclase grains (Pl) (thin section from Sample 195-1201B-8X-6, 26-28 cm [59.16 mbsf]). Both photomicrographs were taken in plane-polarized light.

Figure F18. A. Fresh lithic arenite of Unit II, showing abundant porphyry and vitrophyre rock fragments. The upper left part of this section is occupied by a sideromelane fragment (Sidm) with abundant bubble-shaped vesicles (thin section from Sample 195-1201D-1R-CC, 14-17 cm [86.82 mbsf]). B. Fresh siltstone of Unit II dominated by bubble-wall glass shards (Sh) and infrequent plagioclase grains (Pl) (thin section from Sample 195-1201B-8X-6, 26-28 cm [59.16 mbsf]). Both photomicrographs were taken in plane-polarized light.