Keyes, Charles, 1923, Biotic resolution of Red Wall Limestone of Grand Canyon: Pan-American Geologist, v. 39, no. 1, p. 57-61. Authors Keyes, Charles Publication Date 1923 Citation Pan-American Geologist, v. 39, no. 1, p. 57-61. State AZ Province CP TR County CN MO Placenames Marble Canyon Keywords Biostratigraphy Correlation More Keywords Biostratigraphy, Correlation, Redwall Limestone - Mississippian, AzGeoBib RefNum 5268