A generalized view illustrating the approximate distribution of major rock types in Arizona: silt, sand & gravel (aggregate), granite, schist & gneiss, limestone, sandstone, basalt, and mixed volcanic rocks.
Online resources:
Richard, S.M. and others, 2000, Geologic Map of Arizona. Arizona Geological Survey Map-35, 1,000,000 map scale.
Online Geologic Map of Arizona https://library.azgs.arizona.edu/item/AGMS-1552428422626-489
Photo Date: circa 2000