Ecological Land Types within LTA 197.

ELT 197a

Elevation Range

Minimum:

920 m

Minimum in ft:

3019 ft

Maximum:

1312 m

Maximum in ft:

4305 ft

Median:

1130 m

Median in ft:

3707 ft

Soil Summary:

soil survey coverage for this ELT is incomplete but extensive enough to ascertain that the dominant soils are very shallow and shallow to granite and similar rocks; very cobbly loams or very gravelly sandy loams throughout; no lime; no soil development; the mapped area is dominated by Pima County soil survey map unit 40 (Lampshire-Romero- Rock outcrop complex, 10 to 65 percent slopes)

Geologic Materials:

alluvium, colluvium and residuum associated with the Catalina-Rincon igneous metamorphic complex (TXm) which comprise 99% of the unit

Landforms:

moderately dissected, weakly to deeply incised mountain slopes

ELT 197b

Elevation Range

Minimum:

1046 m

Minimum in ft:

3433 ft

Maximum:

1269 m

Maximum in ft:

4163 ft

Median:

1170 m

Median in ft:

3839 ft

Soil Summary:

dominant soils are shallow to granite and similar rocks; very gravelly sandy loams throughout and some better developed soils with sandy clay loam subsoils; no lime; no to modest soil development; the mapped area is dominated by Pima County soil survey map units 70 (Romero-Oracle complex, 25 to 60 percent slopes) and 52 (Oracle-Romero-Rock outcrop complex, 5 to 35 percent slopes) which comprise 66% and 34% of the unit, respectively

Geologic Materials:

alluvium, colluvium and residuum associated with the Catalina-Rincon igneous metamorphic complex (TXm); conglomerate? (KJb); Apache Group and Troy Quartzite, middle Proterozoic (Ya); middle Proterozoic granitic rocks (Yg); and Paleozoic sediments? (P3s) which comprise 62%, 16%, 8%, 6% and 5% of the unit, respectively

Landforms:

moderately to finely dissected, moderately to deeply incised mountain slopes

ELT 197c

Elevation Range

Minimum:

1170 m

Minimum in ft:

3840 ft

Maximum:

1541 m

Maximum in ft:

5057 ft

Median:

1339 m

Median in ft:

4393 ft

Soil Summary:

dominant soils are very shallow and shallow to granite and similar rocks; very cobbly loams and very gravelly sandy loams throughout, and some better developed soils sandy clay loam subsoils; no lime; no to modest soil development; the mapped area is dominated by Pima County soil survey map units 40 (Lampshire-Romero- Rock outcrop complex, 10 to 65 percent slopes) and 52 (Oracle-Romero-Rock outcrop complex, 5 to 35 percent slopes) which comprise 66% and 34% of the unit, respectively

Geologic Materials:

alluvium, colluvium and residuum associated with landslide deposits (Qls) and the Catalina-Rincon igneous metamorphic complex (TXm) which comprise 54% and 46% of the unit, respectively

Landforms:

coarsely dissected, weakly incised mountain slopes

ELT 197d

Elevation Range

Minimum:

1267 m

Minimum in ft:

4156 ft

Maximum:

2006 m

Maximum in ft:

6582 ft

Median:

1669 m

Median in ft:

5476 ft

Soil Summary:

dominant soils are very shallow and shallow to granite, gneiss and similar rocks; very cobbly loams, extremely and very gravelly sandy loams, or very gravelly loams throughout; no lime; no or little soil development (surface organic matter accumulation); the mapped area is dominated by Pima County soil survey map unit 40 (Lampshire-Romero- Rock outcrop complex, 10 to 65 percent slopes) and 20 (Cortaro-Rock outcrop-Faraway complex, 15 to 45 percent slopes) which comprise 61% and 37% of the unit, respectively

Geologic Materials:

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

Landforms:

coarsely to moderately dissected, weakly incised mountain slopes

ELT 197e

Elevation Range

Minimum:

1341 m

Minimum in ft:

4401 ft

Maximum:

1977 m

Maximum in ft:

6487 ft

Median:

1614 m

Median in ft:

5295 ft

Soil Summary:

detailed soil survey information is not available for this unit; correlates with GES unit 303 characterized by extremely cobbly sandy loams shallow to moderately deep to granite or granite-like bedrock, acid soils lacking lime throughout, minimal soil development, and associated rock outcroppings

Geologic Materials:

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

Landforms:

moderately dissected, moderately to deeply incised mountain slopes

ELT 197f

Elevation Range

Minimum:

1063 m

Minimum in ft:

3487 ft

Maximum:

1209 m

Maximum in ft:

3965 ft

Median:

1131 m

Median in ft:

3711 ft

Soil Summary:

dominant soils are very shallow and shallow to granite and similar rocks; very cobbly loams or very gravelly sandy loams throughout; no lime; no soil development; the mapped area is dominated by Pima County soil survey map unit 40 (Lampshire-Romero- Rock outcrop complex, 10 to 65 percent slopes) which comprises 99% of the unit

Geologic Materials:

alluvium, colluvium and residuum associated with granodiorite (Xgl, Xgc) and Tertiary sediments (Ts) which comprise 86% and 13% of the unit, respectively

Landforms:

coarsely to moderately dissected, weakly incised elevated plains and hills