Supplemental material: Rates of river incision and scarp retreat in eastern and central Grand Canyon over the past half million years: Evidence for passage of a transient knickzone

Geosphere, June 2015, v. 11, p. 638-659, doi:10.1130/GES00978.1, Supplemental File - The Supplemental File more fully describes our U/Th methods and samples and includes outcrop photos and a table of sample locations.