Sections

Ecological Land Types within LTA 5.

ELT 5a

Elevation Range
Minimum: 
832 m
Minimum in ft: 
2730 ft
Maximum: 
953 m
Maximum in ft: 
3128 ft
Median: 
888 m
Median in ft: 
2913 ft
Soil Summary: 
very deep; very gravelly clay loam, gravelly sandy loam, and very gravelly and very cobbly 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); dominated by Pima County soil survey map units 54 (Palos Verdes-Jaynes complex, 2 to 8 percent slopes), 60 (Pinaleno-Stagecoach complex, 5 to 16 percent slopes), 61 (Pinaleno-Stagecoach-Palos Verdes complex, 10 to 35 percent slopes) and 62 (Pinaleno very cobbly sandy loam, 1 to 8 percent slopes). These units comprise 49, 24, 12, and 11% of the ELT, respectively
Geologic Materials: 
alluvium and residuum associated with Quaternary and Tertiary sandstone, siltstone and conglomerate, undivided (QTs), undivided surficial deposits and basin fill (QTs), and Middle Pleistocene river terrace deposits (Qi1r, Qi2, Qyc), and Pantano Formation (Tp) which comprise 66%, 27%, 4% and 3% of the unit, respectively
Landforms: 
coarsely to moderately dissected, weakly to moderately incised fan and pediment surfaces except adjacent to Pantano Wash which are moderately to finely dissected and moderately to deeply incised

ELT 5b

Elevation Range
Minimum: 
793 m
Minimum in ft: 
2601 ft
Maximum: 
858 m
Maximum in ft: 
2814 ft
Median: 
827 m
Median in ft: 
2713 ft
Soil Summary: 
very deep, gravelly sandy loam surface layers over gravelly sandy loam and gravelly sandy clay loam subsurface layers; lime depth ranges from the soil surface to more than a foot below the surface; weak to moderate (clay accumulation) development; dominated by Pima County soil survey map unit 54 (Palos Verdes-Jaynes complex, 2 to 8 percent slopes). This unit comprises nearly 100 percent of the unit
Geologic Materials: 
alluvium and residuum associated with Middle Pleistocene river terrace deposits (Qi1r, Qi3), and Quaternary and Tertiary sandstone, siltstone and conglomerate, undivided (QTs) which comprise 98% and 2% of the ELT, respectively
Landforms: 
coarsely to moderately dissected, weakly to moderately incised fan and pediment surfaces except adjacent to Tanque Verde Wash which are moderately to finely dissected and moderately to deeply incised

Catalina