Fig. 2. Topographic and geologic map in Bartlett Mountains northwest of Joshua Tree, California (Hopson, 1996), showing a sixth location of remnant felsic diorite interlayered with megacrystal quartz monzonite. (Joshua Tree North, 7 and 1/2 Minute Quadrangle, California, T1N, R6E, Section 21, center of SE quarter, four red dots)