Upheaval Dome is a breached domal structure that is surrounded by a well-developed rim syncline; it lies in the rugged canyonlands of southern Utah, near the western margin of the Paradox Basin. Strata that range in age from Permian to Jurassic are exposed in the dome and all have been deformed by the forces which produced the feature; about 3000 feet of Pennsylvanian salt beds underlies the area of the dome. The origin of Upheaval Dome has not been established, but the following hypotheses have been advanced: (1) it is a cryptovolcanic feature; (2) it is a simple salt dome;...