Late Cretaceous Click the image to see the original photo at maximum resolution (potentially large files). Click the title to see a full description, geolocation, and more. Photos 1 - 6 of 6 azgs_photo Geologic map of the Tucson Caldera, Arizona azgs_photo Pegmatite dike in biotite granite, Mt Lemmon, Arizona azgs_photo Fossil Leaf of the Wepo Formation azgs_photo Granite exposed along Mt. Lemmon Highway, Santa Catalina Mountains azgs_photo Granite of the Dragoon Mountains, eastern Arizona azgs_photo Grus of the Amole Pluton of northern Tucson Mountains
