Soil Summary:
very deep, textures vary widely and soils are often stratified – loamy sand to silt loam surfaces with very gravelly coarse sand to silt loam layers below, lime content varies from none to limy throughout or within a foot of the surface, no or little soil development, some high waters tables on lower terraces; dominated by Cochise County, Northwestern Part soil survey units 18 (Cascabel, Quiburi soils, and Riverwash, Sonoran, 0 to 5 percent slopes), 2 (Agustin-Yturbide-Kokan complex, Sonoran, 1 to 8 percent slopes), 20 (Casabel, Quiburi, and Typic Fluvaquents soils and Water, Sonoran, 0 to 5 percent slopes), and 85 (Vinton-Gila complex, Sonoran, 0 to 3 percent slopes). These units comprise 38%, 29%, 17%, and 8% of the ELT, respectively
Geologic Materials:
river alluvium associated with active channel and Holocene terraces (Qyr), late Holocene alluvium (Qy2) and Tcg and which comprise 60%, 20%, and 15% of the LTA, respectively
