Maxson, J.H., 1949, Lava flows in the Grand Canyon of the Colorado River, Arizona: Geological Society of America Bulletin, v. 60, no. 1, p. 9-16.
Maxson, J.H.
Geological Society of America Bulletin, v. 60, no. 1, p. 9-16.
Volcanic, Landscape Evolution, Tectonics, Pliocene, Quaternary, Pleistocene, Holocene,