Image Arizona has Potash! Read more Image Arizona Rocks Postcard #4 Read more Image Drilling for Potash, Holbrook Basin 6/2010 Read more Image Northern Arizona: Geologic cross section Gray Mtn to Moenkopi Wash Read more Image People putting geology to work - Sinagua Ruins near Flagstaff Read more Image Rock strata of Hualapai Canyon, Havasupai Tribal Lands Read more Permian Arizona has Potash! Northern Arizona: Geologic cross section Gray Mtn to Moenkopi Wash Drilling for Potash, Holbrook Basin 6/2010 People putting geology to work - Sinagua Ruins near Flagstaff Rock strata of Hualapai Canyon, Havasupai Tribal Lands Sedona Red Rock Country - Brins Fire 2006 Sandstones of the Supai Group along AZ 89A, Sedona, Arizona Strata exposed on the White House Ruin Trail, Canyon de Chelly McCauley Sinks, Holbrook Basin, Arizona Walking through time on Grand Canyon's Bright Angel Trail Geologic map of Grand Canyon, Arizona Pothole in the Supai formation of Wet Beaver Creek, central Arizona Trace fossils in the Permian Coconino Sandstone Potash Distribution in the subsurface of the Holbrook Basin Diorite intruding Naco Group Limestone Reptile Trackway in Permian sandstone