Figure F85. Sphalerite or magnetite (too small to identify in thin section) precipitated on early pyrite and overgrown by later pyrite (Sample 193-1189A-12R-1 [Piece 16, 122-126 cm]; in reflected light, oil immersion; width of view = 0.14 mm. Photomicrograph ID# 1189A

Figure F85. Sphalerite or magnetite (too small to identify in thin section) precipitated on early pyrite and overgrown by later pyrite (Sample 193-1189A-12R-1 [Piece 16, 122-126 cm]; in reflected light, oil immersion; width of view = 0.14 mm. Photomicrograph ID# 1189A_86; thin section 42).