Figure 3.
Modal data for plutonic units from Yosemite National Park, California, USA, from Bateman (1992). Many of the main units scatter evenly across the granite (monzogranite) and granodiorite fields, and petrologic variability in the granodiorite of Kuna Crest crosses the common point of four fields, meaning that the rock could be called any of the four (really, six; see text). Q—quartz; A—alkali feldspar; P—plagioclase.