Figure F23. Reflected-light photomicrographs showing maghemite replacement of titanomagnetite along cleavage planes. Replacement is almost complete and only narrow relict bands remain, giving the maghemite the appearance of exsolving titanomagnetite. A. Sample 197-1204B-12R-1, 28-30 cm (field of view = 0.25 mm; photomicrograph 1204B-145). B. Sample 197-1204B-12R-1, 28-30 cm (field of view = 0.625 mm; photomicrograph 1204B-146).

Figure F23. Reflected-light photomicrographs showing maghemite replacement of titanomagnetite along cleavage planes. Replacement is almost complete and only narrow relict bands remain, giving the maghemite the appearance of exsolving titanomagnetite. A. Sample 197-1204B-12R-1, 28-30 cm (field of view = 0.25 mm; photomicrograph 1204B-145). B. Sample 197-1204B-12R-1, 28-30 cm (field of view = 0.625 mm; photomicrograph 1204B-146).