Sections

Ecological Land Types within LTA 199.

ELT 199a

Elevation Range
Minimum: 
1036 m
Minimum in ft: 
3398 ft
Maximum: 
1523 m
Maximum in ft: 
4996 ft
Median: 
1228 m
Median in ft: 
4029 ft
Soil Summary: 
detailed soil survey data is incomplete for about 55% of this unit: where soil survey data is available in the southern half of the polygon Pima County unit 65 (Powerline-Kimrose family complex, 10 to 35 percent slopes) dominates. These soils are shallow or moderately deep to lime cemented layers, are dominantly very gravelly sandy loams or sandy clay loams with lime throughout, moderate development (lime accumulation)
Geologic Materials: 
alluvium and residuum associated with gravelly alluvial-fan and braidplain facies of Quiburis Formation (Tqc); sandstone, siltstone and conglomerate, undivided (QTs) and early Pleistocene piedmont deposits (Qo) which comprise 48%, 33% and 6% of the ELT, respectively
Landforms: 
finely dissected, moderately to deeply incised fan and pediment surfaces

ELT 199b

Elevation Range
Minimum: 
1085 m
Minimum in ft: 
3560 ft
Maximum: 
1237 m
Maximum in ft: 
4058 ft
Median: 
1159 m
Median in ft: 
3802 ft
Soil Summary: 
very deep, gravelly loam and very gravelly sandy loam surfaces with subsoils ranging from gravelly sandy clay loams to clays, devoid of lime or lime deep in the soil profile,well developed (clay accumulation); unit dominated by Pima County soil survey map units 10 (Caralampi extremely gravelly sandy loam, 15 to 45 percent slopes) and 85 (White House gravelly loam, 1 to 8 percent slopes). These units comprise 71% and 16% of the ELT, respectively
Geologic Materials: 
alluvium and residuum associated with sandstone, siltstone and conglomerate, undivided (QTs) and early Pleistocene piedmont deposits (Qo) which comprise 63% and 37% of the ELT, respectively
Landforms: 
finely dissected, moderately to deeply incised fan and pediment surfaces

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