Arizona Geological Society: Untangling the Stratigraphy of the Upper Paleozoic Supai and Naco Groups of the Mogollon Escarpment
The famous red rocks of the Mogollon Escarpment, from Sedona to White River, have traditionally been assigned the name Supai, correlating these rocks with the Supai Group of the Grand Canyon. The underlying limestone-bearing units have traditionally been called the Naco Formation in reference to the Naco Group of southeastern Arizona. Several workers, however, have...