Powell, J.W., 1874, The Colorado canyons, in Tribune Popular Science: Boston, Henry L. Shepard and Co., Part 3, p. 9-10. Authors Powell, J.W. Publication Date 1874 Citation Boston, Henry L. Shepard and Co., Part 3, p. 9-10. State AZ Province CP TR County CN MO Placenames Glen Canyon Marble Canyon Keywords Areal Structure Stratigraphy Physiography More Keywords Areal, Structure, Stratigraphy, Physiography, AzGeoBib RefNum 8078