This Clear, Easy-To-Read Study documents the most recent interpretations of the spectacular geologic features in the eastern half of the Colorado Plateau. More than 200 illustrations complement the step-by-step explanations of the more than 300-million-year evolution of this convoluted landscape. Fillmore covers in detail the region stretching from the high plateaus of the Book Cliffs in the north to the spectacularly deep canyons of the San Juan River area in the south.<BR><BR>Presenting the controversial Upheaval dome in a clear and complete discussion, Fillmore cites past theories as well as the latest evidence that solves this geologic mystery. He also incorporates mile-by-mile road logs with explanations for the various rock units and geologic features found along most of the scenic routes throughout the area, including roads in Natural Bridges National Monument and Canyonlands and Arches national parks. The chronological presentation of the geologic events that shaped this vast region emulates the colorful layers of sediment laid down one on top of the other, revealing a fascinating story.