Figure F33. Photomicrographs of Cr spinel inclusions (light spots) in a partially altered olivine phenocryst in Unit 1 (Sample 197-1206A-4R-3 [Piece 4A, 72-74 cm]) (reflected light). A. The largest Cr spinel (center right) has no titanomagnetite overgrowths, unlike the smaller crystals in this olivine (field of view = 1.25 mm; photomicrograph 1206A-293). B. Close-up of the left side of A, where four Cr spinel inclusions have partially or totally been replaced by titanomagnetite (light gray) (field of view = 0.25 mm; photomicrograph 1206A-294).

Figure F33. Photomicrographs of Cr spinel inclusions (light spots) in a partially altered olivine phenocryst in Unit 1 (Sample 197-1206A-4R-3 [Piece 4A, 72-74 cm]) (reflected light). A. The largest Cr spinel (center right) has no titanomagnetite overgrowths, unlike the smaller crystals in this olivine (field of view = 1.25 mm; photomicrograph 1206A-293). B. Close-up of the left side of A, where four Cr spinel inclusions have partially or totally been replaced by titanomagnetite (light gray) (field of view = 0.25 mm; photomicrograph 1206A-294).