Sections

Ecological Land Types within LTA 116.

ELT 116a

Elevation Range
Minimum: 
811 m
Minimum in ft: 
2660 ft
Maximum: 
1045 m
Maximum in ft: 
3430 ft
Median: 
949 m
Median in ft: 
3114 ft
Soil Summary: 
very deep, very gravelly sandy loam to sandy loam surfaces with very gravelly sandy clay loam to clay subsoils, lime is absent or deeper in the soil profile, well developed (subsoil clay accumulation); nearly complete coverage of the unit indicates Pima County soil survey map units 73 (Sasabe-Caralampi complex, 1 to 15 percent slopes), 27 (Diaspar sandy loam, 1 to 5 percent slopes), and 9 (Caralampi extremely gravelly sandy loam, 5 to 15 percent slopes) dominate
Geologic Materials: 
alluvium and residuum associated with early to late Pleistocene alluvium (Qi, Qi1, Qi2, Qi3); sandstone, siltstone and conglomerate, undivided (QTs); and Holocene piedmont alluvium, undivided (Qy) which comprise 76%, 15% and 8% of the unit, respectively
Landforms: 
mostly undissected fan and pediment surfaces

ELT 116b

Elevation Range
Minimum: 
1014 m
Minimum in ft: 
3328 ft
Maximum: 
1136 m
Maximum in ft: 
3727 ft
Median: 
1074 m
Median in ft: 
3524 ft
Soil Summary: 
detailed soil survey information is not available for this unit
Geologic Materials: 
alluvium and residuum associated with Quaternary and Tertiary sediments (Qi); Holocene channel deposits (Qyc); and sandstone, siltstone and conglomerate, undivided (QTs); which comprise 62%, 23% and 11%of the unit, respectively
Landforms: 
coarsely dissected, weakly incised fan and pediment surfaces

ELT 116c

Elevation Range
Minimum: 
1120 m
Minimum in ft: 
3675 ft
Maximum: 
1231 m
Maximum in ft: 
4038 ft
Median: 
1169 m
Median in ft: 
3835 ft
Soil Summary: 
detailed soil survey information is not available for this unit
Geologic Materials: 
alluvium and residuum associated with Quaternary and Tertiary sediments (Qs, QTs, Qi) and Oracle Granite (Yg) which comprise 88% and 6% of the unit, respectively
Landforms: 
coarsely dissected, weakly incised fan and pediment surfaces

ELT 116d

Elevation Range
Minimum: 
897 m
Minimum in ft: 
2942 ft
Maximum: 
1003 m
Maximum in ft: 
3290 ft
Median: 
951 m
Median in ft: 
3120 ft
Soil Summary: 
very deep, very gravelly sandy loam to sandy loam surfaces with very gravelly sandy clay loam to clay subsoils, lime is absent or deeper in the soil profile, well developed (subsoil clay accumulation); nearly complete coverage of the unit indicates Pima County soil survey map units 9 (Caralampi extremely gravelly sandy loam, 5 to 15 percent slopes) and 73 (Sasabe-Caralampi complex, 1 to 15 percent slopes) dominate
Geologic Materials: 
alluvium and residuum associated with sandstone, siltstone and conglomerate, undivided (QTs); early to latest Pleistocene alluvium (Qi1, Qi2, Qi3); Holocene river deposits, undivided (Qyr); and Holocene piedmont alluvium, undivided (Qy) which comprise 42%, 22%,18%, and 13% of the unit, respectively
Landforms: 
undissected to coarsely dissected, weakly incised fan and pediment surfaces

ELT 116e

Elevation Range
Minimum: 
890 m
Minimum in ft: 
2919 ft
Maximum: 
1015 m
Maximum in ft: 
3330 ft
Median: 
960 m
Median in ft: 
3150 ft
Soil Summary: 
dominant soils are shallow to granite and similar rocks; very gravelly sandy loams throughout or gravelly coarse sandy loam over sandy clay loam; no lime; no or modest soil development (clay accumulation); nearly complete coverage of the unit indicates Pima County soil survey map unit 52 (Oracle-Romero-Rock outcrop complex, 5 to 35 percent slopes) which comprises 93% of the unit
Geologic Materials: 
alluvium and residuum associated with sandstone, siltstone, and conglomerate, undivided (QTs) and Holocene piedmont alluvium, undivided (Qy) which comprise 85% and 10% of the unit, respectively
Landforms: 
undissected to finely dissected, weakly incised fan and pediment surfaces

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