Pliocene sinistral slip across the Adobe Hills, eastern California-western Nevada: Kinematics of fault slip transfer across the Mina Deflection
Sarah Nagorsen-Rinke et al., Dept. of Geological Sciences, Central Washington University, Ellensburg, Washington 98926, USA. Posted online 11 Jan. 2013; now part of the February 2013 issue; http://geosphere.gsapubs.org/content/9/1/37.abstract.
The Adobe Hills, California-Nevada, USA, is a region of faulted volcanic rock located within what is called the Mina deflection, a zone of faults that connects the right-lateral fault slip dominated northern Eastern California shear zone (ECSZ) to the south with the right-lateral fault slip dominated Walker Lane belt (WLB) to the north. New geologic mapping, fault studies, and geochronology in the Adobe Hills allow researchers Sarah Nagorsen-Rinke and colleagues to calculate fault slip rates and test predictions for how fault slip is transferred from one fault system to another. Rocks exposed in the Adobe Hills include 11-million-year-old explosive volcanic rock overlain by three- to four-million-year-old (Pliocene age) sandstones, basalt lava flows, and basalt cinder cones, and younger (less than one-million-year-old) sands, alluvium, and mud. The authors propose that a set of faults located west of the White Mountains fault zone and east of Long Valley Caldera transfer a portion of right lateral Owens Valley fault slip northwestward onto the left lateral faults in the Adobe Hills. Fault slip in the Adobe Hills is part of a regional pattern of initiation and renewal of
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