Earth fissures crop out in five Arizona counties: Cochise, La Paz, Maricopa, Pima, and Pinal Counties. This illustration shows the distribution of earth fissure study areas as of 2015. Note the McMullen Valley study area in La Paz County was added post-2015. Earth fissures form as the result of substantial basin subsidence that stems from groundwater withdrawal. Visit the interactive Natural Hazards in Arizona Viewer for the most up-to-date distribution of Arizona earth fissures. http://uagis.maps.arcgis.com/apps/webappviewer/index.html?id=98729f76e46...
Photographer: Joseph Cook
Photo Date: 2015