Sections

Ecological Land Types within LTA 185.

ELT 185a

Elevation Range
Minimum: 
702 m
Minimum in ft: 
2302 ft
Maximum: 
763 m
Maximum in ft: 
2502 ft
Median: 
720 m
Median in ft: 
2362 ft
Soil Summary: 
very deep, textures vary widely and soils are often stratified – very gravelly fine sand to loam surfaces with extremely gravelly sand to silty clay loam layers below, limy, no or little development (relatively recent alluvium); this unit is dominated by Pima County map units 5 (Arizo-Riverwash complex, 0 to 3 percent slopes) and 30 (Glendale silt loam, 0 to 3 percent slopes) which comprise 53% and 44% of the ELT, respectively
Geologic Materials: 
dominated by Holocene channel deposits and terraces (Qyr); modern channel deposits (Qyc); and Holocene piedmont alluvium, undivided (Qy) which comprise 66%, 17% and 14% of the unit, respectively
Landforms: 
undissected to coarsely dissected, weakly incised alluvial terraces and floodplain

ELT 185b

Elevation Range
Minimum: 
750 m
Minimum in ft: 
2459 ft
Maximum: 
812 m
Maximum in ft: 
2663 ft
Median: 
770 m
Median in ft: 
2526 ft
Soil Summary: 
very deep, textures vary widely and soils are often stratified – very gravelly fine sand to sandy loam surfaces with extremely gravelly sand to fine sandy loam layers below, limy, no or little development (relatively recent alluvium); this unit is dominated by Pima County map units 3 (Anthony fine sandy loam, 0 to 3 percent slopes) and 5 (Arizo-Riverwash complex, 0 to 3 percent slopes) which comprise 60% and 37% of the ELT, respectively
Geologic Materials: 
dominated by Holocene piedmont alluvium, undivided (Qy); Holocene channel deposits and terraces (Qyr); late to latest Pleistocene piedmont alluvium (Qi3r, Qi3) which comprise 57%, 20% and 14% of the unit, respectively
Landforms: 
undissected to coarsely dissected, weakly incised alluvial terraces and floodplain

ELT 185c

Elevation Range
Minimum: 
784 m
Minimum in ft: 
2572 ft
Maximum: 
851 m
Maximum in ft: 
2792 ft
Median: 
804 m
Median in ft: 
2638 ft
Soil Summary: 
very deep, textures vary widely and soils are often stratified – very gravelly fine sand to sandy loam surfaces with extremely gravelly sand to fine sandy loam layers below, limy, no or little development (relatively recent alluvium); this unit is dominated by Pima County map units 3 (Anthony fine sandy loam, 0 to 3 percent slopes) and 5 (Arizo-Riverwash complex, 0 to 3 percent slopes) which comprise 68% and 23% of the ELT, respectively
Geologic Materials: 
dominated by Holocene piedmont alluvium, undivided (Qy); Holocene to Pleistocene alluvium (Qyl); late Holocene deposits in active stream channels and low terraces (Qy2); modern channel deposits (Qyc); and late to latest Pleistocene piedmont alluvium (Qi3r, Qi3) which comprise 50%,12%, 12%, 9% and 6% of the unit, respectively
Landforms: 
undissected to coarsely dissected, weakly incised alluvial terraces and floodplain

ELT 185d

Elevation Range
Minimum: 
802 m
Minimum in ft: 
2630 ft
Maximum: 
890 m
Maximum in ft: 
2920 ft
Median: 
831 m
Median in ft: 
2726 ft
Soil Summary: 
very deep, sandy loams over sandy loams, gravelly sandy loams and gravelly loamy coarse sands, devoid of lime, weakly developed; this unit is dominated by Pima County map unit 35 (Hayhook sandy loam, 1 to 5 percent slopes) which comprises 85% of the ELT
Geologic Materials: 
dominated by Pantano Formation (Tp); Tertiary sediments? (Ts-Y/Ts); and modern channel deposits (Qyc) which comprise 45%, 27% and 12% of the unit, respectively
Landforms: 
undissected to coarsely dissected, weakly incised alluvial terraces and floodplain

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