Darton, N.H., 1912, Some features in the Grand Canyon of the Colorado River: Geological Society of America Bulletin, v. 23, p. 721. Authors Darton, N.H. Publication Date 1912 Citation Geological Society of America Bulletin, v. 23, p. 721. State AZ Province CP County CN Keywords Physical Stratigraphy More Keywords Physical Stratigraphy, AzGeoBib RefNum 2415