Ecological Land Types within LTA 10.

ELT 10a

Elevation Range

Minimum:

921 m

Minimum in ft:

3021 ft

Maximum:

1141 m

Maximum in ft:

3742 ft

Median:

1015 m

Median in ft:

3330 ft

Soil Summary:

shallow to granite or granite like rocks; very gravelly fine sandy loam over gravelly sandy clay loam; no lime; modest development (clay accumulation); dominated by Pima County soil survey map unit 16 (Chimenea very gravelly fine sandy loam, 5 to 15 percent slopes). This unit comprises 94% of the ELT

Geologic Materials:

alluvium and residuum associated with heterogeneous granodioritic rocks of the north White Tank Mountains (Xgd, Xfg), Pleistocene piedmont alluvium (Qi), Pantano Formation (Tpav, Tpl), and colluvium (Qc) which comprise 90%, 6%, 2%, and 1% of the unit, respectively

Landforms:

moderately to finely dissected, weakly to incised pediment surfaces

ELT 10b

Elevation Range

Minimum:

1017 m

Minimum in ft:

3337 ft

Maximum:

1116 m

Maximum in ft:

3660 ft

Median:

1053 m

Median in ft:

3455 ft

Soil Summary:

dominant soils are very shallow and shallow to granite and similar rocks; very cobbly loams or very gravelly sandy loams throughout, some soils are very gravelly fine sandy loams or gravelly coarse sandy loam over gravelly sandy clay loam or sandy clay loam; no or modest soil development (clay accumulation); dominated by Pima County soil survey map units 16 (Chimenea very gravelly fine sandy loam, 5 to 15 percent slopes), 70 (Romero-Oracle complex, 25 to 60 percent slopes), and 40 (Lampshire-Romero-Rock outcrop complex, 10 to 65 percent slopes). These units comprise 44%, 34% and 22% of the ELT, respectively

Geologic Materials:

alluvium and residuum associated with the Catalina-Rincon igneous metamorphic complex (TXm) which comprises 100% of the unit

Landforms:

moderately to finely dissected, weakly incised pediment surfaces