Figure F17. Photomicrographs showing titanomagnetite morphologies. K. Bireflectance of ilmenite and highlighting the development of ilmenite oxidation lamellae in titanomagnetite from Subunit 3b. After rotating the stage 90, the ilmenite oxidation lamellae are not illuminated (Sample 197-1205A-13R-3, 27-29 cm) (reflected light; field of view = 0.25 mm; photomicrograph 1205A-227). L. Ilmenite oxidation not restricted to lamellae in Unit 27. Ilmenite is illuminated (Sample 197-1205A-43R-2 [Piece 2A, 58-60 cm]) (reflected light; field of view = 0.25 mm; photomicrograph 1205A-252).