Fig. 11. Tiny portion of a microcline megacryst (dark gray), 2 to 3 cm long, in Twentynine Palms quartz monzonite. Megacryst contains more than 50 vol. % fragments of quartz and plagioclase (gray and white) and a few tiny euhedral sphene crystals (brown), all remnants of a cataclastically deformed diorite. Hornblende is absent and presumably replaced by quartz and/or microcline. In hand specimen, the megacryst looks like one of those shown in Figs. 3 and 4 and gives no outward clue that it contains abundant inclusions. In most megacrysts, inclusions are less abundant (5 to 20 vol. %). (Photo magnification is 52.5x)