Middle Miocene to Recent Exhumation of the Slate Range, Eastern California, and Implications for the Timing of Extension and the Transition to Transtension
Middle Miocene to recent exhumation of the Slate Range, eastern California, and implications for the timing of extension and the transition to transtension J. Douglas Walker, Tandis S. Bidgoli, Brad D. Didericksen*, Daniel F. Stockli†, and Joseph E. Andrew Department of Geology, University of Kansas, Lawrence, Kansas 66045, USA ABSTRACT sional belt at the latitude of Las Vegas, Nevada, 2005) considered the Furnace Creek fault to be may have been stretched as much as 300% since active from ca. 9 to 5 Ma, and that this fault is a New mapping combined with fault-slip and ca. 16 Ma (e.g., Wernicke et al., 1988; Niemi component of the dextral regime (Fig. 1). Snow thermochronological data show that Middle et al., 2001). The earlier deformation resulted and Lux (1999) interpreted the change to dex- Miocene to recent extension and exhumation in primarily east-west extension across the tral deformation in Death Valley to have started of the Slate Range, eastern California, is pro- region (Wernicke et al., 1982, 1988), initiat- ca. 11 Ma (Fig. 1). Other studies that focus on duced by the active Searles Valley fault sys- ing ca. 15 Ma, as inferred by the ages of early different areas interpret younger ages for this tem and the Slate Range detachment, an older basin deposits of the Panuga (Snow and Lux, change to transtension. Hodges et al. (1989) Middle Miocene low-angle normal fault. Off- 1999) and Eagle Mountain formations (Niemi placed the transition as ca. 3.7 Ma in Pana- set Middle Miocene rocks record a combined et al., 2001) of the northern Death Valley area, mint Valley (Fig.
[Show full text]