Figure F49. Typical XRD results for clay veins: (A) smectite (interval 200-1224E-3R-3, 46-50 cm) and (B) illite (interval 200-1223D-3R-3, 90-92 cm). Significant peaks are identified. Montmorillonite and saponite are in the smectite group. Laumonite is in the zeolite group. Green = montmorillonite, blue = saponite, red = illite, black = laumonite. Cps = counts per second.