Figure F77. Lamellae in lattice textured magnetite (medium gray) partially replaced by maghemite or hematite (light gray) in an altered groundmass (Sample 193-1188A-20R-1 [Piece 5, 92-95 cm] in reflected light; width of view = 0.275 mm. Photomicrograph ID# 1188A_105; thin section 25).