Restoration of 12%-30% Basin and Range extension allows direct interpretation of ductile fabrics associated with a stack of Laramide thrust faults in the Quito- vac region in northwestern Sonora. The inferred direction of displacement of these thrusts varies gradually from N63??W to N23??E and is interpreted to represent a clockwise rotation of the direction of Laramide thrusting through time. The thrust faults represent a piggy-back sequence of thrusting propagating north, toward the foreland. The average direction and sense of displacement of the thrusts is N18??W, and the cumulative 45 km of estimated northward-directed displacement corresponds to ???86% of shortening. ?? 2005 Geological Society of America.
Additional Publication Details
Northward laramide thrusting in the quitovac region, northwestern sonora, mexico: Implications for the juxtaposition of paleoproterozoic basement blocks and the mojave-sonora megashear hypothesis
Special Paper of the Geological Society of America