Figure F32. Quartz-sphalerite amygdule within highly altered volcanic rock from Unit 26 (Sample 193-1189B-16R-1 [Piece 2, 36-39 cm] in plane-polarized light; width of view = 1.38 mm. Photomicrograph ID# 1189B

Figure F32. Quartz-sphalerite amygdule within highly altered volcanic rock from Unit 26 (Sample 193-1189B-16R-1 [Piece 2, 36-39 cm] in plane-polarized light; width of view = 1.38 mm. Photomicrograph ID# 1189B_51; thin section 136).