Figure F21. Reflected-light photomicrographs showing that titanomagnetite has been completely replaced by maghemite. A. Sample 197-1204B-10R-2, 77-79 cm (field of view = 0.625 mm; photomicrograph 1204A-155). B. Sample 197-1204B-7R-2, 129-131 cm (field of view = 0.625 mm; photomicrograph 1204B-151).