Figure F53. Anhedral former magnetite microphenocryst, which has broken down to leucoxene (dark patch in central portion of image), with remnant trellislike laths of magnetite faintly visible. A pyrite cube overgrows the magnetite (interval 193-1188A-19R-1, 73-76 cm, Unit 22, in reflected light; width of view = 0.7 mm. Photomicrograph ID# 1188A

Figure F53. Anhedral former magnetite microphenocryst, which has broken down to leucoxene (dark patch in central portion of image), with remnant trellislike laths of magnetite faintly visible. A pyrite cube overgrows the magnetite (interval 193-1188A-19R-1, 73-76 cm, Unit 22, in reflected light; width of view = 0.7 mm. Photomicrograph ID# 1188A_93; thin section 22).