Bales, J.T., Wellendorf, C.S., and Pewe, T.L., 1986, Caliche, Tempe quadrangle, Maricopa County, Arizona, in Pewe, T.L., Wellendorf, C.S., and Bales, J.T., Environmental geology of the Tempe quadrangle, Maricopa County, Arizona: Arizona Bureau of Geology and Mineral Technology Geologic Investigation Series Map GI-2-G, 1 sheet, scale 1:24,000.