"The occasion presented an opportunity for the organizing committee to provide, through 34 field trips, a comprehensive expose of the geology of Arizona. Thirty-three of the field guides to these trips are included herein. Field-trip plans were made with two chief goals in mind: to provide to participants a sense of the discovery and momentum that attend geologic research and exploration in the Southwest during this, the close of the first century of GSA; and to underscore the quality of geologic exposures and the natural aesthetic appeal of the Southwest in general and Arizona in particular. It seemed very appropriate that the 100th meeting of GSA be held in the Grand canyon State"
CITATION: Davis, G.H. and VandenDolder, E.M., 1987, Geologic Diversity of Arizona and its Margins: Excursions to Choice Areas. Field-Trip Guidebook, Geological Society of America, Arizona Bureau of Mineral Technology, Special Paper 5, 422 p.