Figure F27. Close-up photomicrograph in cross-polarized light of rounded plagioclase phenocrysts in altered volcanic rock from Hole 1189B (Section 193-1189B-16R-1 [Piece 6, 36-39 cm]; width of view = 2.75 mm. Photomicrograph ID# 1189B

Figure F27. Close-up photomicrograph in cross-polarized light of rounded plagioclase phenocrysts in altered volcanic rock from Hole 1189B (Section 193-1189B-16R-1 [Piece 6, 36-39 cm]; width of view = 2.75 mm. Photomicrograph ID# 1189B_71, thin section 136).