ELT 28h
Soil Summary:
dominant soils are very deep, very gravelly loamy sand and very gravelly and gravelly fine sandy loam surfaces over gravelly and very gravelly sandy loams and sandy clay loams, clay, gravelly clay, gravelly clay loam and very gravelly clay loam subsurface layers, limy throughout or roughly a foot or more to lime, moderate to strong development (lime and clay accumulation) ; unit is dominated by Cochise County, Northwestern Part soil survey unit 83 (Tombstone-Stronghold complex, 5 to 30 percent slopes) and 55 (Libby-Gulch complex, 0 to 10 percent slopes). They comprise 60% and 20% of the ELT respectively
Geologic Materials:
alluvium and residuum associated with sandstone, siltstone and conglomerate, undivided (QTs); early Pleistocene alluvium (Qo); middle to late Pleistocene piedmont alluvium (Qi2); basin fill deposits (QTs); late to latest Pleistocene piedmont deposits (Qi3); Holocene piedmont alluvium, undivided (Qy); and Holocene piedmont alluvium, undivided (Qy) which comprise 42%, 12%, 11%, 10%, 7% and 6% of the unit, respectively
Landforms:
coarsely to finely dissected, weakly to moderately incised fan and pediment surfaces