Fig. 19. Corner of orthoclase megacryst (light gray, left side) and granulated groundmass minerals anastomosing around the corner, causing elongated biotite and plagioclase grains to become aligned parallel to the faces of the orthoclase. Note that the orthoclase grew into the corner where the broken groundmass minerals split and divide and surrounded some of the broken groundmass minerals. The narrow black crystals that partly extend across the orthoclase at the corner are not in a fracture but quartz at extinction.