These maps cover Maricopa, Pinal, Pima and Cochise counties. The show known and previously reported earth fissures at a 1:250,000 scale suitable for planning purposes. The AZGS is currently working on higher resolution mapping of earth fissures that will be displayed on 1:24,000 scale. These detailed maps will be released as they are completed.
Yesterday the Arizona Geologic Survey (AZGS) released the first two of their 1:12,000 series earth fissure maps to the general public. The mapping program, perhaps the first of its kind in the country, came about after an earth fissures opened up in 2005 near Queen Creek, AZ, southeast of metropolitan Phoenix received much media attention. As a result, the Arizona Legislature passed House Bill 2639 of the 2006 Legislative Session that tasked the AZGS with mapping earth fissures and providing the data to the State Land Department for eventual delivery to property owners in Arizona. More after the break. (At left, the Apache Junction study area map, AZGS)