Fig. 5. Felsic diorite, showing cataclastic texture. Broken groundmass matrix, consisting of hornblende (brown and green), quartz (clear-white and gray), and plagioclase (gray and dark gray), surrounds larger islands of albite-twinned plagioclase (white to gray). In center and center left are two microcline crystals (dark gray) with irregular borders against the granulated groundmass. Microcline is in earliest stages of replacement and contains minor wartlike myrmekite with tiny quartz vermicules (barely visible) along borders of the microcline. Microcline is 1 to 5 vol. % of the rock. Normal, undeformed, felsic Gold Park diorite (Fig. 4) has crystals of hornblende and plagioclase all about the same size. (Photo magnification is 52.5x)