Sonoyta Valley

U.S. Department of Agriculture, Soil Conservation Service, 1972, Soil survey, Organ Pipe Cactus National Monument, Pima County, Arizona, A special report: U.S. Department of Agriculture, Soil Conservation Service, 37 p., 28 sheets, scale 1:24,000.

Theobald, P.K., and Barton, H.N., 1988, Maps showing anomalous concentrations of zinc, silver, antimony, manganese, barium, and strontium in stream sediment and heavy-mineral concentrate from parts of the Ajo and Lukeville 1o x 2o quadrangles, Arizona: U.S. Geological Survey Miscellaneous Field Studies Map MF-1834-E, 1 sheet, scale 1:500,000.

Theobald, P.K., and Barton, H.N., 1988, Maps showing anomalous concentrations of lead, molybdenum, bismuth, and tungsten in stream sediment and heavy-mineral concentrate from parts of the Ajo and Lukeville 1o x 2o quadrangles, Arizona: U.S. Geological Survey Miscellaneous Field Studies Map MF-1834-D, 1 sheet, scale 1:500,000.

Theobald, P.K., and Barton, H.N., 1987, Maps showing anomalous copper concentrations in stream sediments and heavy-mineral concentrates from the Ajo and Lukeville 1o x 2o quadrangles, Arizona: U.S. Geological Survey Miscellaneous Field Studies Map MF-1834-C, 1 sheet, scale 1:500,000.

Richardson, M.L., and Miller, M.L., 1974, Report and interpretations for the general soil map, Pima County, Arizona: U.S. Department of Agriculture, Soil Conservation Service, 49 p., 1 sheet, scale 1:500,000.

Peterson, J.A., Cox, D.P., and Gray, F., 1987, Mineral resource assessment of the Ajo and Lukeville 1o by 2o quadrangles, Arizona: U.S. Geological Survey Miscellaneous Field Studies Map MF-1834-B, 3 sheets, scale 1:250,000.

Peterson, J.A., Cox, D.P., and Gray, F., 1985, Mineral resource assessment of the Ajo and Lukeville 1o by 2o quadrangles, Arizona: U.S. Geological Survey Open-File Report 85-0527, 79 p., 3 sheets, scale 1:250,000.

Peterson, J.A., and Tosdal, R.M., 1986, Mineral occurrence map and tabulation of geologic, commodity, and production data, Ajo and Lukeville 1o by 2o quadrangles, southwestern Arizona: U.S. Geological Survey Miscellaneous Field Studies Map MF-1834-A, 1 sheet, scale 1:250,000.

Morrison, R.B., 1984, Late Pliocene and Quaternary geology, Lukeville & Sonoyta [quadrangle]: Arizona Bureau of Geology and Mineral Technology Open-File Report 84-03, 6 p., 1 sheet, scale 1:250,000.

Melton, M.A., 1965, Debris-covered hillslopes of the southern Arizona desert--consideration of their stability and sediment contribution: Journal of Geology, v. 73, no. 5, p. 715-729.