Figure F17. Photomicrographs showing titanomagnetite morphologies. A. Alteration of titanomagnetite to maghemite along cleavage planes and around rims in the weathered flow top of Unit 10 (Sample 197-1205A-24R-2 [Piece 19, 124-130 cm]) (reflected light; f

Figure F17. Photomicrographs showing titanomagnetite morphologies. M. Ilmenite oxidation not restricted to lamellae in Unit 27. After rotating the stage 90°, ilmenite is not illuminated (Sample 197-1205A-43R-2 [Piece 2A, 58-60 cm]) (reflected light; field of view = 0.25 mm; photomicrograph 1205A-253). N. Early stages of maghemite (bright blue-gray) replacement of titanomagnetite (dull pink-gray) in the Site 1205 basement lava units: maghemite development along titanomagnetite cleavage planes in Subunit 12b (Sample 197-1205A-27R-5 [Piece 5, 103-105 cm]) (reflected light; field of view = 0.25 mm; photomicrograph 1205A-224).