Fig. 2. Geologic map of part of the Tuolumne Intrusive Suite near Tuolumne Meadows, showing where Route 120 crosses the Cathedral Peak granodiorite (+ symbols). Map is modified after Bateman and Chappell (1979). Samples were collected along Route 120 from which photomicrographs of textures in thin sections of the Cathedral Peak granodiorite were obtained (Figs. 3-13).