Figure F50. Photomicrograph of a GSC altered volcanic rock with preserved flow-banded texture and late crosscutting quartz veins (interval 193-1189A-5R-1, 14-16 cm, Unit 9, in plane-polarized light; width of view = 5.5 mm. Photomicrograph ID# 1189A

Figure F50. Photomicrograph of a GSC altered volcanic rock with preserved flow-banded texture and late crosscutting quartz veins (interval 193-1189A-5R-1, 14-16 cm, Unit 9, in plane-polarized light; width of view = 5.5 mm. Photomicrograph ID# 1189A_14; thin section 34).