“…Gilbert 1971Gilbert , 1973Page 1981Page , 1982Dickinson 1983;Hall , 2002Hall et al 1995;Dickinson et al 2005;Ducea et al 2009;Jacobson et al 2011). Four interpretations of the nature of the boundary discussed in numbered topics below are: (i) dextral slip of (a) 2100-2500 km (1305-1554 mi) or more (Champion et al 1984) along unnamed faults or (b) 90 km (56 mi) or more of dextral slip on the Nacimiento fault (Vedder et al 1991, p. 951); (ii) sinistral strike slip of 500-600 km (311-373 mi) on the Nacimiento fault (Dickinson 1983;Seiders and Blome 1988;Dickinson et al 2005;Jacobson et al 2011, figure 10); (iii) thrusting along the K-T Nacimiento fault (Page 1967(Page , 1969(Page , 1970a(Page , 1970b(Page , 1972(Page , 1982Silver 1982Silver , 1983Page and Brocher 1993;Hall et al 1995;Barth and Schneiderman 1996;Saleeby 1997Saleeby , 2003Yin 2002;Barth et al 2003;Kidder and Ducea 2006;Ducea et al 2009;Namson and Davis 2012); and (iv) as a corollary to (iii) above, the Nacimiento fault was a low-angle subduction megathrust surface along which the Sur-Obispo Franciscan belt was subducted, and then partially extruded back out along which promoted the observed upper plate (Salinia) extension and subsidence to marine conditions in Maastrichtian time (after Grove 1993).…”