Figure F9. Thin section of silty clay-sized serpentine matrix showing typical unsorted grain-size texture (Sample 195-1200F-1H-4, 34-36 cm) (crossed polarizers; 10x magnification). The groundmass consists of silt-sized serpentine flakes. Larger embedded sand-sized grains consist of serpentine flakes or represent altered lithoclasts (upper left and right) that were replaced pseudomorphously by serpentine (white and gray interference colors) and brucite (brown interference colors).

Figure F9. Thin section of silty clay-sized serpentine matrix showing typical unsorted grain-size texture (Sample 195-1200F-1H-4, 34-36 cm) (crossed polarizers; 10x magnification). The groundmass consists of silt-sized serpentine flakes. Larger embedded sand-sized grains consist of serpentine flakes or represent altered lithoclasts (upper left and right) that were replaced pseudomorphously by serpentine (white and gray interference colors) and brucite (brown interference colors).