Quartz grain in micaceous quartzite. Quartz is dissolved on the top and bottom boundaries and new quartz-mica has precipitated in the pressure shadows on both sides of the quartz grain; the contact detrital grain-recrystallized aggregate is irregular and displays a concentration of subgrains showing a slight crystallographic misorientation relative to old grain; the jaggedness of the contact corresponds to the shape of new grains formed at the expense of the old grain, possibly through the process of progressive subgrain rotation, although the role of dissolution-reprecipitation is clearly important. (Sample WR 041, White Range, central Australia) (0.65 mm)