Biostratigraphy

Gutschick, R.C., 1949, Redwall Limestone along the southwest margin of the Colorado Plateau [abs.]: Geological Society of America Bulletin, v. 60, no. 12, p. 1893.

Gutschick, R.C., 1947, Redwall Limestone of north-central Arizona [abs.]: Geological Society of America Bulletin, v. 58, p. 1186.

Gutschick, R.C., 1943, The Redwall Limestone (Mississippi) of Yavapai County, Arizona: Plateau, v. 16, no. 1, p. 1-11.

Gutschick, R.C., 1942, Redwall limestone of north-central Arizona: Urbana, University of Illinois, Ph.D. dissertation, 96 p.

Gray, R.S., 1967, Petrology of the upper Cenozoic non-marine sediments of the San Pedro Valley, Arizona: Journal of Sedimentary Petrology, v. 37, no. 3, p. 774-789.

Gray, R.S., 1965, Late Cenozoic sediments in the San Pedro Valley near St. David, Arizona: Tucson, University of Arizona, Ph.D. dissertation, 198 p, 3 sheets.

Gordon, M., Jr., and McKee, E.D., 1978, Significance of the invertebrate fauna of the Watahomigi Formation (Supai Group) [abs.]: Geological Society of America Abstracts with Programs, v. 10, no. 3, p. 107.

Gordon, M., Jr., 1982, Biostratigraphy of the Watahomigi Formation, in McKee, E.D., ed., The Supai Group of Grand Canyon: U.S. Geological Survey Professional Paper 1173, p. 113-135.

Galusha, T., Johnson, N.M., Lindsay, E.H., Opdyke, N.D., and Tedford, R.H., 1984, Biostratigraphy and magnetostratigraphy, late Pliocene rocks, 111 Ranch, Arizona: Geological Society of America Bulletin, v. 95, no. 6, p. 714-722.

Freeman, W.E., and Visher, G.S., 1975, Stratigraphic analysis of the Navajo Sandstone: Journal of Sedimentary Petrology, v. 45, no. 3, p. 651-668.