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. C. Alteration of titanomagnetite to maghemite in tholeiitic Subunit 19b (Sample 197-1205A-35R-4 [Piece 1C, 77-79 cm]) (reflected light; field of view = 0.25 mm; photomicrograph 1205A-280). D. Typical titanomagnetite morphologies in the alkali basalt from Unit 20 (Sample 197-1205A-36R-5 [Piece 2D, 50-51 cm]) (reflected light; field of view = 1.25 mm; photomicrograph 1205A-283).