Sections

Ecological Land Types within LTA 142.

ELT 142a

Elevation Range
Minimum: 
926 m
Minimum in ft: 
3039 ft
Maximum: 
940 m
Maximum in ft: 
3085 ft
Median: 
936 m
Median in ft: 
3071 ft
Soil Summary: 
very deep, very gravelly sandy loam surface soils and extremely cobbly sandy loam and loamy sand subsurface layers, lime lacking except for coatings on cobbles and gravels lower in the soil, no development; dominated by Pima County soil survey map unit 37 (Keysto extremely gravelly fine sandy loam, 2 to 8 percent slopes). This unit comprises 100% of the unit, respectively
Geologic Materials: 
river alluvium associated with Holocene piedmont alluvium, undivided (Qy) which comprise 95% of the LTA
Landforms: 
mostly undissected floodplain and lower river terraces

ELT 142b

Elevation Range
Minimum: 
781 m
Minimum in ft: 
2562 ft
Maximum: 
998 m
Maximum in ft: 
3273 ft
Median: 
858 m
Median in ft: 
2815 ft
Soil Summary: 
very deep, very gravelly sandy loam or sandy loam surface soils and extremely cobbly sandy loam and loamy sand to sandy loam and fine sandy loam subsurface layers; lime lacking except for coatings on cobbles and gravels and traces lower in the soil, no development; dominated by Pima County soil survey map units 19 (Comoro sandy loam, 0 to 2 percent slopes) and 37 (Keysto extremely gravelly fine sandy loam, 2 to 8 percent slopes). These units comprise 51% and 48% of the unit, respectively
Geologic Materials: 
river alluvium associated with Holocene river deposits, undivided (Qyr), modern channel deposits (Qyc), and Holocene piedmont alluvium, undivided (Qy) which comprise 70%, 14% and 11% of the ELT, respectively
Landforms: 
mostly undissected floodplain and lower river terraces

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