Figure F12. Volcanic clasts with fibrous, laminar internal texture are abundant in thin section of the sulfide-rich Unit 21. These delicate internal textures (arrow) are interpreted as the remnants of tube pumice vesicles (Sample 193-1189A-12R-1 [Piece 16, 122-126 cm]; width of view = 1.38 mm. Photomicrograph ID# 1189A

Figure F12. Volcanic clasts with fibrous, laminar internal texture are abundant in thin section of the sulfide-rich Unit 21. These delicate internal textures (arrow) are interpreted as the remnants of tube pumice vesicles (Sample 193-1189A-12R-1 [Piece 16, 122-126 cm]; width of view = 1.38 mm. Photomicrograph ID# 1189A_76; thin section 42).