Figure F42. Anhydrite-pyrite veining with well-developed siliceous halos hosted in GSC altered volcanic rock. The vein has cut and filled two vesicles (interval 193-1188A-8R-1, 124-127 cm, Unit 6, in plane-polarized light; width of view = 0.7 mm. Photomicrograph ID# 1188A

Figure F42. Anhydrite-pyrite veining with well-developed siliceous halos hosted in GSC altered volcanic rock. The vein has cut and filled two vesicles (interval 193-1188A-8R-1, 124-127 cm, Unit 6, in plane-polarized light; width of view = 0.7 mm. Photomicrograph ID# 1188A_22; thin section 8).