Keyes, C.R., 1913, Angular amphitheaters of the Grand Canyon [abs.]: Science, new series, v. 37, p. 457-458. Authors Keyes, C.R. Publication Date 1913 Citation Science, new series, v. 37, p. 457-458. State AZ Province CP TR County CN MO Placenames Marble Canyon Keywords Geomorphology Landscape Evolution More Keywords Geomorphology, Landscape Evolution, AzGeoBib RefNum 5259