T. Scott Bryan 
Arizona Rocks [EPUB ebook] 
A Guide to Geologic Sites in the Grand Canyon State

Arizona Rocks! tells the stories of 44 of the best geologic sites in the state. Not only will you learn about well-known places, such as Barringer Meteorite Crater and Petrified Forest National Park, but you’ll also discover lesser-known sites, including Hopi Buttes, which formed from steam-driven explosions; Peridot Mesa, where gemstones from the Earth’s interior are found, and Montezuma Well, a limestone sinkhole with a perennial supply of water.