Fig. 1. Regional map of southern California showing location of major structures and muscovite-bearing granitic rocks. Stippled field shows area where muscovite-garnet granites crop out in central and western Mojave Desert. GR = Gabilan Range, TP = Thorps Peak granodiorite, JM = Josephine Mountain intrusion, LB = Lovejoy Buttes, FB = Fremont Peak/Buttes, HC = Hall Canyon muscovite granite, and QM = Twentynine Palms quartz monzonite. Other muscovite-bearing granitic rocks in the southern Sierra Nevada are shown on the map in Miller et al. (1996, their Fig. 1).