“…Other examples are the Karakoram slides [Hewitt, 1988[Hewitt, , 2002Hewitt et al, 2008], the Socompa slide [Wadge et al, 1995], the Köfels slide [Erismann, 1979], Madison Canyon [Hadley, 1964], Black Canyon, and El Capitan and Split Mountain slides [Yarnold and Lombard, 1989].) Campbell et al [1995] demonstrated that stratigraphy preservation is the result of a folding process during which the entire landslide is shearing, requiring a friction reduction mechanism that acts globally, not just in a basal layer. Only very near the end of sliding did these authors observe shear localized at the base.…”