Keyes, Charles, 1941, Ancient peneplanations of Grand Canyon region: Pan-American Geologist, v. 76, no. 4, p. 275-298. Authors Keyes, Charles Publication Date 1941 Citation Pan-American Geologist, v. 76, no. 4, p. 275-298. State AZ Province AL County AL Keywords Stratigraphy Correlation Sedimentary Structure More Keywords Stratigraphy, Correlation, Sedimentary Structure, AzGeoBib RefNum 5307