Ecological Land Types within LTA 7.

ELT 7a

Elevation Range

Minimum:

827 m

Minimum in ft:

2712 ft

Maximum:

935 m

Maximum in ft:

3068 ft

Median:

858 m

Median in ft:

2815 ft

Soil Summary:

dominant soils are very shallow and shallow to granite and similar rocks; very gravelly sandy loams throughout, some soils with gravelly clay loam surfaces and gravelly clay and clay subsoils; no lime; no to moderate soil development (clay accumulation); dominated by Pima County soil survey map unit 13 (Cellar-Lehmans complex, 5 to 25 percent slopes). This unit comprises 94% of the ELT, respectively

Geologic Materials:

alluvium and residuum associated with the Catalina-Rincon igneous and metamorphic complex (TXm) and middle to late Pleistocene piedmont alluvium, undivided (Qi),which comprise 74% and 20% of the unit, respectively

Landforms:

moderately to finely dissected, weakly to moderately incised fan and pediment surfaces

ELT 7b

Elevation Range

Minimum:

829 m

Minimum in ft:

2720 ft

Maximum:

928 m

Maximum in ft:

3045 ft

Median:

856 m

Median in ft:

2808 ft

Soil Summary:

Geologic Materials:

alluvium and residuum associated with the Catalina-Rincon igneous and metamorphic complex (TXm) and middle to late Pleistocene piedmont alluvium, undivided (Qi) which comprise 44% and 34% of the unit, respectively

Landforms:

moderately to finely dissected, weakly to moderately incised fan and pediment surfaces

ELT 7c

Elevation Range

Minimum:

841 m

Minimum in ft:

2760 ft

Maximum:

877 m

Maximum in ft:

2876 ft

Median:

854 m

Median in ft:

2802 ft

Soil Summary:

dominant soils are very shallow and shallow to granite and similar rocks; very gravelly sandy loams and very cobbly loams throughout, some soils with gravelly clay loam surfaces and gravelly clay and clay subsoils; no lime; no to moderate soil development (clay accumulation); dominated by Pima County soil survey map units 13 (Cellar-Lehmans complex, 5 to 25 percent slopes) and 12 (Cellar-Lampshire-Rock Outcrop complex, 15 to 60 percent slopes). These units comprise 78% and 21% of the ELT, respectively

Geologic Materials:

alluvium and residuum associated with the Holocene piedmont alluvium, undivided (Qy), late to latest Pleistocene piedmont alluvium (Qi3), and Catalina-Rincon igneous and metamorphic complex (TXm) and which comprise 39%, 33% and 29% of the unit, respectively

Landforms:

moderately to finely dissected, weakly to moderately incised fan and pediment surfaces

ELT 7d

Elevation Range

Minimum:

920 m

Minimum in ft:

3020 ft

Maximum:

986 m

Maximum in ft:

3234 ft

Median:

951 m

Median in ft:

3120 ft

Soil Summary:

Geologic Materials:

alluvium and residuum associated with undivided surficial deposits and basin fill (QTs), the Catalina-Rincon igneous and metamorphic complex (TXm), and areas of rock exposure, mostly Pinal Schist (Xp, P1eh, Kjb) which comprise 44%, 42%, and 13% of the ELT, respectively

Landforms:

moderately to finely dissected, weakly to moderately incised fan and pediment surfaces