ELT 6b
Soil Summary:
shallow to granitic rocks and very deep, gravelly and very gravelly sandy loam surface layers over gravelly sandy loam and gravelly sandy clay loam subsurface layers, other very deep soils derived from recent alluvium have very gravelly fine sand surface layers and extremely gravelly sand subsurface layers; lime depth ranges from the soil surface to more than a foot below the surface; the shallow soils derived from granite have no lime; weak to moderate (clay accumulation) development; dominated by Pima County soil survey map units 54 (Palos Verdes-Jaynes complex, 2 to 8 percent slopes), 16 (Chimenea very gravelly fine sandy loam, 5 to 15 percent slopes), and 5 (Arizo-Riverwash complex, 0 to 3 percent slopes). These units comprise 56,19 and 13% of the ELT, respectively
Geologic Materials:
alluvium and residuum associated with middle to late Pleistocene piedmont alluvium, undivided (Qi), late to latest Pleistocene piedmont alluvium (Qi3), small areas of rock exposure (mostly granodiorite, Xrv), Pantano Formation (Tp), and Holocene river deposits (Qy2, Qyr) which comprise 49%, 19%, 16%, 9% and 6% of the unit, respectively
Landforms:
finely dissected, weakly to moderately incised fan and pediment surfaces