Figure F15. Vein of pale-green smectite in Sample 176-735B-133R-7 (Piece 1, 126-137 cm). Olivine, plagioclase, and clinopyroxene are highly altered to smectite in the alteration halo. Altered plagioclase appears pale green, altered olivine dark, and altered clinopyroxene brown or has a brilliant reflectance at greater distance from the vein (incipient alteration).