Pennsylvanian to Cretaceous folds and thrusts in south-central Nevada: evidence from the Timpahute Range

Pennsylvanian to Cretaceous folds and thrusts in south-central Nevada: evidence from the Timpahute Range by Angela Russo Dr. Wanda J. Taylor, Examination Committee Chair Professor of Geoscience University of Nevada, Las Vegas Understanding Permian and Mesozoic contractional structures from southern California to northern Nevada requires correlation through south-central Nevada. After the Devonian-Mississippian Antler orogeny through the Permian-Triassic Sonoma orogeny and then up to the Sevier orogeny, south-central Nevada was thought to have remained tectonically inactive. However, Pennsylvanian through Jurassic age deformation is documented to the south in Death Valley and to the north. Identifying geometries, spatial relationships, and relative timing of deformations in the Timpahute Range, south-central Nevada, is an essential piece to completing the overall understanding of Nevada geology. The purpose of this study is to identify and analyze deformational structures of the Timpahute Range and clarify their geometries, relative timing, regional correlation, and tectonic significance. All contraction in the Timpahute Range is constrained by Antler foreland basin units and the intrusion of the 102.9 ± 3.2 Ma Lincoln stock. New mapping at a scale of 1:12,000 documents three contractional episodes in the Timpahute Range, and crosscutting relations from this study determine at least a relative timeline. The Tempiute