Ecological Land Types within LTA 117.

ELT 117a

Elevation Range
Minimum: 
706 m
Minimum in ft: 
2316 ft
Maximum: 
998 m
Maximum in ft: 
3274 ft
Median: 
799 m
Median in ft: 
2621 ft
Soil Summary: 
very deep; very gravelly clay loam, gravelly sandy loam, and very gravelly sandy loam surface layers over gravelly, very gravelly and extremely gravelly sandy loam, gravelly and very gravelly sandy clay loam subsurface layers; lime depth ranges from the surface to more than a foot below the soil surface; no to modest development (lime and clay accumulation); some inclusions are associated with granite or granite-like rocks and are shallow or moderately deep to bedrock, are very to extremely gravelly with varying depth to lime deposits, moderate development (lime and subsoil clay accumulation); inclusions of recent alluvium tend to be sandy, limy, and have no development; dominated by Pima County soil survey map units 60 (Pinaleno-Stagecoach complex, 5 to 16 percent slopes), 61 (Pinaleno-Stagecoach-Palos Verdes complex, 10 to 35 percent slopes), 62 (Pinaleno very cobbly sandy loam, 1 to 8 percent slopes), 58 (Pantano-Granolite complex, 5 to 25 percent slopes), and 5 (Arizo-Riverwash complex, 0 to 3 percent slopes). These units comprise 50, 19, 14, 8 and 5% of the ELT, respectively
Geologic Materials: 
alluvium and residuum associated with early to late Pleistocene alluvium (Qi, Qi1, Qi2, Qi3); the Rillito Formation (Ts1); sandstone, siltstone and conglomerate, undivided (QTs) and Holocene piedmont alluvium, undivided (Qy, Qy1) which comprise 48%, 21%, 14% and 11% of the unit, respectively
Landforms: 
coarsely to finely dissected, moderately incised fan and pediment surfaces