Soil Summary:
very deep; fine sandy loam surface soils over gravelly clay and gravelly sandy clay loam subsoils and very gravelly fine sandy loam or sandy loam surface soils over mostly fine sandy loam, loam and clay loam subsurface layers; lime depth ranges from the surface to several feet deep; weak to strong development (clay accumulation) dominated by Pima County soil survey map units 81 (Tubac gravelly loam, 1 to 8 percent slopes), 72 (Sahuarita soils, Mohave soils and Urban land, 1 to 5 percent slopes). These units comprise 60% and 18% of the ELT, respectively
Geologic Materials:
alluvium and residuum associated with Pleistocene piedmont alluvium (Qi2, Qi, Qi1, Qi1r, Qi2r, Qi3, Qy), sandstone, siltstone, and conglomerate, undivided (QTs), small areas of rock exposure, mostly granodiorite (Xgd), Pliocene to early Pleistocene river deposits (QTsr), and Pleistocene river terraces (Qir, Qy2) which comprise 62%, 31%, 3%, 2% and 1% of the unit, respectively
