Sections

Ecological Land Types within LTA 27.

ELT 27a

Elevation Range
Minimum: 
1171 m
Minimum in ft: 
3842 ft
Maximum: 
1272 m
Maximum in ft: 
4174 ft
Median: 
1220 m
Median in ft: 
4003 ft
Soil Summary: 
mostly shallow to bedrock, a complex of 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 24 (Deloro-Rock outcrop complex, 15 to 60 percent slopes) and 23 (Deloro-Andrada complex, 5 to 35 percent slopes) which comprise 43% and 36% of the ELT, respectively
Geologic Materials: 
alluvium, colluvium and residuum associated with the Bisbee Group (Kbs); Holocene alluvium (Qy); and basin fill deposits and conglomerate with colluvial veneer (QTs, QTsc) which comprise 46%, 33% and 10% of the ELT, respectively
Landforms: 
undissected to coarsely dissected, weakly incised mountain hills

ELT 27b

Elevation Range
Minimum: 
1207 m
Minimum in ft: 
3959 ft
Maximum: 
1238 m
Maximum in ft: 
4061 ft
Median: 
1220 m
Median in ft: 
4003 ft
Soil Summary: 
mostly shallow to bedrock, better developed extremely channery loams over extremely channery clays related to phyllite and lacking lime; dominated by Pima County soil survey map unit 24 (Deloro-Rock outcrop complex, 15 to 60 percent slopes) which comprises 98% of the ELT
Geologic Materials: 
alluvium, colluvium and residuum associated with the Pantano conglomerate,variably silicified (Tpl) and Bisbee Group (Kbs) which comprise 87% and 12% of the ELT, respectively
Landforms: 
undissected to coarsely dissected, weakly incised mountain hills

ELT 27c

Elevation Range
Minimum: 
1191 m
Minimum in ft: 
3908 ft
Maximum: 
1248 m
Maximum in ft: 
4096 ft
Median: 
1215 m
Median in ft: 
3986 ft
Soil Summary: 
mostly shallow to bedrock, better developed extremely channery loams over extremely channery clays related to phyllite and lacking lime; dominated by Pima County soil survey map unit 24 (Deloro-Rock outcrop complex, 15 to 60 percent slopes) which comprises 90% of the ELT
Geologic Materials: 
alluvium, colluvium and residuum associated with the Glance Conglomerate? (KJg) and Holocene piedmont alluvium, undivided (Qy) which comprise 71% and 21% of the ELT, respectively
Landforms: 
undissected to coarsely dissected, weakly incised mountain hills

ELT 27d

Elevation Range
Minimum: 
1191 m
Minimum in ft: 
3908 ft
Maximum: 
1248 m
Maximum in ft: 
4096 ft
Median: 
1215 m
Median in ft: 
3986 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 91% of the ELT
Geologic Materials: 
alluvium, colluvium and residuum associated with upper Paleozoic strata (Pzu); Paleozoic carbonate rock (Pzc); Martin Formation (Dm); Holocene piedmont alluvium (Qy); and middle to late Pleistocene piedmont alluvium (Qi2) which comprise 38%, 26%, 13%, 5% and 5% of the ELT, respectively
Landforms: 
coarsely to moderately dissected, weakly to moderately incised hills

ELT 27e

Elevation Range
Minimum: 
1079 m
Minimum in ft: 
3541 ft
Maximum: 
1184 m
Maximum in ft: 
3885 ft
Median: 
1111 m
Median in ft: 
3645 ft
Soil Summary: 
mostly shallow to bedrock, better developed extremely channery loams over extremely channery clays related to phyllite and lacking lime and limy extremely gravelly loams associated with sandstone, also very deep, very gravelly fine sand over stratified sand, fine sand and gravelly coarse sand with variable lime presence and no soil development; dominated by Pima County soil survey map unit 23 (Deloro-Andrada complex, 5 to 35 percent slopes) and 66 (Redington very gravelly fine sand, 3 to 50 percent slopes) which comprise 79% and 12% of the ELT, respectively
Geologic Materials: 
alluvium, colluvium and residuum associated with Proterozoic granite (Tpx); Quaternary surficial deposits, undivided (Qs); the upper member of the Pantano Formation (Tpu); and the Coyote Wells Facies of the Pantano Formation which comprise 64%, 15%, 14% and 5% of the ELT, respectively
Landforms: 
undissected to coarsely dissected, weakly incised mountain hills

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