Sand & gravel builds Arizona

In most U.S. states, sand and gravel is the number one mineral commodity. Why? Because it's the critical ingredient of American infrastructure - buildings, roads, bridges, and more. Sand and gravel quarry at the northwest end of the Gila Mountains east of Yuma, looking northwest across the Gila River at the Laguna Hills. Photo by Jon Spencer. Pearthree, P.A. & others, 2015, Geologic Map Database for Aggregate Resource Assessment in the Phoenix Metropolitan Area and Surrounding Regions, Arizona. Arizona Geological Survey Digital Information DI-43, 11 p., map sheet, Shapefiles, ArcGIS Map Packages, polygons and geologic features http://repository.azgs.az.gov/uri_gin/azgs/dlio/1640