Allen, V.T., 1930, Triassic bentonite of the Painted Desert: American Journal of Science, 5th ser., v. 19, no. 112, p. 283-288.
Allen, V.T.
American Journal of Science, 5th ser., v. 19, no. 112, p. 283-288.
Clay, Sedimentary Petrology, Geochemical Survey, Paleoenvironment, Chinle Fm - Triassic,