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. http://repository.azgs.az.gov/uri_gin/azgs/dlio/1705
Online Geologic Map of Arizona: http://data.azgs.az.gov/geologic-map-of-arizona/
