Figure F76. Disseminated Type 1 pyrite in a microlite-rich groundmass of moderately altered rhyodacite (Sample 193-1189A-3R-1 [Piece 2, 6-10 cm]; in plane-polarized transmitted light; width of view = 0.7 mm. Photomicrograph ID# 1189A

Figure F76. Disseminated Type 1 pyrite in a microlite-rich groundmass of moderately altered rhyodacite (Sample 193-1189A-3R-1 [Piece 2, 6-10 cm]; in plane-polarized transmitted light; width of view = 0.7 mm. Photomicrograph ID# 1189A_06; thin section 32).