Tosdal, R.M., and Sherrod, D.R., 1985, Geometry of Miocene extensional deformation, lower Colorado River region, southeastern California and southwestern Arizona: Evidence for the presence of a regional low-angle normal fault [abs.], in Papers presented to the Conference on Heat and Detachment in Crustal Extension on Continents and Planets, Sedona, Arizona, October 10-12, 1985: Houston, Lunar and Planetary Institute, LPI Contribution 575, p. 147-151.