Fig. 5 Comparison of Malpass x-ray diffraction patterns. Sample from presumed Malpass deposit at Jackson-Frazier wetland (upper pattern) and Malpass sample from Corvallis airport (lower pattern). 1 = Mg-dismectite-glycol, 2 = di-vermiculite, 3 = illite, 5 = Mg-chlorite, 6 = kaolinite