Ecological Land Types within LTA 25.

ELT 25a

Elevation Range

Minimum:

1008 m

Minimum in ft:

3308 ft

Maximum:

1202 m

Maximum in ft:

3942 ft

Median:

1077 m

Median in ft:

3533 ft

Soil Summary:

mostly shallow to bedrock, a complex of limy very gravelly over extremely cobbly loams with little or no development associated with limestone, better developed extremely channery loams over extremely channery clays related to phyllite and lacking lime, and extremely gravelly loams associated with schist with lime accumulations; dominated by Pima County soil survey map units 57 (Mabray-Deloro-Rock outcrop complex, 20 to 65 percent slopes) and 59 (Pantano-Rock outcrop complex, 25 to 60 percent slopes) which comprise 55% and 35% of the ELT, respectively

Geologic Materials:

alluvium, colluvium and residuum associated with Horquilla Formation (Ph); Earp Formation (PPe); and the Epitaph Formation (Pe) which comprise 47%, 27% and 13% of the ELT, respectively

Landforms:

moderately dissected, weakly to moderately incised hills

ELT 25b

Elevation Range

Minimum:

1037 m

Minimum in ft:

3401 ft

Maximum:

1258 m

Maximum in ft:

4128 ft

Median:

1093 m

Median in ft:

3586 ft

Soil Summary:

mostly shallow to bedrock, a complex of limy very gravelly over extremely cobbly loams with little or no development associated with limestone, better developed extremely channery loams over extremely channery clays related to phyllite and lacking lime, and limy extremely gravelly loams associated with sandstone; dominated by Pima County soil survey map units 23 (Deloro-Andrada complex, 5 to 35 percent slopes), 24 (Deloro-Rock outcrop complex, 15 to 60 percent slopes), and 42 (Mabray-Deloro-Rock outcrop complex, 20 to 65 percent slopes) which comprise 47%, 28% and 23% of the ELT, respectively

Geologic Materials:

alluvium, colluvium and residuum associated with heterogeneous granodioritic rocks of the northern White Tanks (Xgd); Bolsa, Abrigo and Martin Formations (Dcu); Middle Proterozoic Apache Group and Troy Quartzite (Ya); Pantano Formation, lower member (Tpl); and Pantano Formation, Aqua Verde Facies (Tpav) which comprise 35%, 26%, 18%, 9% and 6% of the ELT, respectively

Landforms:

coarsely dissected, weakly to moderately incised mountain hills

ELT 25c

Elevation Range

Minimum:

1049 m

Minimum in ft:

3440 ft

Maximum:

1210 m

Maximum in ft:

3969 ft

Median:

1154 m

Median in ft:

3786 ft

Soil Summary:

soil survey coverage is incomplete for this ELT with about 28 percent of the unit lacking data; Pima County soil survey map unit 42 (Mabray-Deloro-Rock outcrop complex, 20 to 65 percent slopes) dominates the mapped area and characterized by soils mostly shallow to bedrock in a complex of limy very gravelly over extremely cobbly loams with little or no development associated with limestone and better developed non-limy extremely channery loams over extremely channery clays related to phyllite.

Geologic Materials:

alluvium, colluvium and residuum associated with Horquilla Formation (Ph); Escabrosa Formation (Me); Earp Formation (PPe); Escabrosa and Horquilla, undivided (PMc); younger Holocene terraces and active channel deposits (Qy2); and Bolsa. Abrigo, and Martin Formations (Dcu) which comprise 26%, 26%, 11%, 7% and 6% of the ELT, respectively

Landforms:

moderately dissected, moderately to strongly incised hills and mountain slopes

ELT 25d

Elevation Range

Minimum:

988 m

Minimum in ft:

3240 ft

Maximum:

1104 m

Maximum in ft:

3623 ft

Median:

1044 m

Median in ft:

3425 ft

Soil Summary:

soils mostly shallow to bedrock in a complex of limy very gravelly over extremely cobbly loams with little or no development associated with limestone and better developed non-limy extremely channery loams over extremely channery clays related to phyllite; Pima County soil survey map unit 42 (Mabray-Deloro-Rock outcrop complex, 20 to 65 percent slopes) comprises 90% of the ELT

Geologic Materials:

alluvium, colluvium and residuum associated with old alluvium (QTs); the Lower Davidson Canyon facies of Pantano Formation, mixed conglomerate, reddish (Tpl); upper member of Pantano Formation (Tpu); and Turkey Track Andesite (Tpv) which comprise 41%, 15%, 12% and 11% of the ELT, respectively

Landforms:

undissected to coarsely dissected, weakly incised hills and pediment surfaces

ELT 25e

Elevation Range

Minimum:

1049 m

Minimum in ft:

3443 ft

Maximum:

1105 m

Maximum in ft:

3626 ft

Median:

1076 m

Median in ft:

3530 ft

Soil Summary:

Geologic Materials:

alluvium, colluvium and residuum associated with Miocene to Quaternary conglomerate with colluvial veneer (QTsc); Turkey Track Andesite (Tpv); the Lower Davidson Canyon facies of Pantano Formation, mixed conglomerate, reddish (Tpl); and upper member of Pantano Formation (Tpu) which comprise 69%, 12%, 9% and 6% of the ELT, respectively

Landforms:

undissected to coarsely dissected, weakly incised hills and pediment surfaces

ELT 25f

Elevation Range

Minimum:

909 m

Minimum in ft:

2981 ft

Maximum:

977 m

Maximum in ft:

3204 ft

Median:

938 m

Median in ft:

3077 ft

Soil Summary:

mostly shallow and moderately deep to bedrock, a complex of extremely gravelly loams associated with schist with lime accumulations and non-limy extremely gravelly sandy loams over extremely gravelly sandy clays related to rhyolite; soils are moderately to well developed (lime and clay accumulations); dominated by Pima County soil survey map unit 58 (Pantano-Granolite complex, 5 to 25 percent slopes) which comprises 99% of the ELT

Geologic Materials:

alluvium, colluvium and residuum associated with Earp and Horquilla Formations, undivided (P3eh) and the Catalina-Rincon igneous metamorphic complex (TXm) which comprise 75% and 23% of the ELT, respectively

Landforms:

coarsely dissected, weakly incised hills