Figure F3. Spinel grains (circled). A. Sample 209-1271B-4R-1 (Piece 6, 28–31 cm) (reflected light; Cr# = 38.2). B. Sample 209-1271B-7R-1 (Piece 7, 49–54 cm) (Cr# = 45.1). C, D. Sample 209-1271B-10R-1 (Piece 15, 82–84 cm) (Cr# = 52.7); (C) reflected light; (D) plane-polarized light. E. Sample 209-1271B-12R-1 (Piece 12, 68–72 cm) (reflected light; Cr# = 57–59). F. Sample 209-1271B-15R-1 (Piece 5, 23–26 cm) (reflected light; Cr# = 64.0). Scale bar = 1mm.