Hewitt, W., 1889, The evolution of the Grand Canyon of the Colorado: Liverpool Geological Association Journal, v. 9, p. 49-55. Authors Hewitt, W. Publication Date 1889 Citation Liverpool Geological Association Journal, v. 9, p. 49-55. State AZ Province CP TR County CN MO Keywords Landscape Evolution More Keywords Landscape Evolution, AzGeoBib RefNum 4421