Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb. At head of title: Department of the Interior. U.S. Geographical and Geological Survey of the Rocky Mountain Region. J.W. Powell, in charge Atlas has special title: ... Topographical and geological atlas of the district of the high plateaus of Utah ... New York, J. Bien, 1879 General considerations relating to the topography and geological history of the high plateaus.--Structural geology.--Volcanic phenomena.--Classification of the volcanic rocks.--Speculations concerning the causes of volcanic action.--Sedimentary formations.--The Wasatch Plateau.--The Tushar.--The Markágunt Plateau.--Sevier Valley and its alluvial conglomerates.--Sevier and Paunságunt Plateaus.--The Fish Lake Plateau. The Awapa. Thousand Lake Mountain--The Aquarius Plateau.--Topographical and geological atlas