Damon, P.E., Hamblin, W.K., and McKee, E.D., 1967, Age of lava dam in Grand Canyon [abs.]: U.S. Geological Survey Professional Paper 575-A, p. A85. Authors Damon, P.E., Hamblin, W.K., and McKee, E.D. Publication Date 1967 Citation U.S. Geological Survey Professional Paper 575-A, p. A85. State AZ Province CP County MO Placenames Toroweap Valley Keywords Geochronology Volcanic Quaternary More Keywords Geochronology, Volcanic, Quaternary, AzGeoBib RefNum 10397