This map was originally published in 1991 as part of Geological Society of America Special Paper 264. It is based on more than 80 geologic maps, both published and unpublished, that were prepared by more than 60 workers, as well as on reconnaissance, remapping, and reinterpretation by the author. References to these previous maps are listed in the following publication: Dickinson, W.R., 1987, General geologic map of Catalina core complex and San Pedro trough, Arizona: Arizona Bureau of Geology and Mineral Technology [currently the Arizona Geological Survey] Miscellaneous Map MM-87-A, 18 p., scale 1:62,500, 15 sheets..