Sections

Ecological Land Types within LTA 29.

ELT 29a

Elevation Range
Minimum: 
1184 m
Minimum in ft: 
3883 ft
Maximum: 
1477 m
Maximum in ft: 
4846 ft
Median: 
1310 m
Median in ft: 
4298 ft
Soil Summary: 
soil survey information is incomplete for about half of this ELT, however dominant soils appear to be shallow to schist and related granitic rocks, very gravelly and gravelly fine sandy loam and sandy loam surfaces over very gravelly fine sandy loam and sandy clay loam subsurface layers, no lime, no to moderate development (clay accumulation), lesser amounts of other soils at lower elevations that are very deep, very gravelly fine sandy loams to loamy sands over very gravelly sandy clay loam to sandy loams, lime at or within a foot of the surface, moderate development (lime and clay accumulation) ; unit is dominated by Cochise County, Northwestern Part soil survey unit 69 (Romero-Nodman-Rock outcrop complex, 5 to 60 percent slopes) and 62 (Nolam-Stronghold complex, 5 to 30 percent slopes).
Geologic Materials: 
residuum, colluvium and alluvium associated with Pinal Schist (Xp) which comprises 92% of the unit
Landforms: 
moderately to finely dissected, weakly to moderately incised mountain slopes and hills

ELT 29b

Elevation Range
Minimum: 
1086 m
Minimum in ft: 
3562 ft
Maximum: 
1306 m
Maximum in ft: 
4286 ft
Median: 
1182 m
Median in ft: 
3878 ft
Soil Summary: 
dominant soils are shallow to schist and related granitic rocks, very gravelly and gravelly fine sandy loam and sandy loam surfaces over very gravelly fine sandy loam and sandy clay loam subsurface layers, no lime, no to moderate development (clay accumulation) ; unit is dominated by Cochise County, Northwestern Part soil survey unit 69 (Romero-Nodman-Rock outcrop complex, 5 to 60 percent slopes). This unit comprises 94% of the ELT
Geologic Materials: 
residuum, colluvium and alluvium associated with early Proterozoic Pinal Schist (Xp) and sandstone, siltstone, and conglomerate, undivided (QTs) which comprise 69% and 18% of the unit, respectively
Landforms: 
moderately dissected, weakly to moderately incised mountain slopes and hills

ELT 29c

Elevation Range
Minimum: 
1097 m
Minimum in ft: 
3600 ft
Maximum: 
1844 m
Maximum in ft: 
6051 ft
Median: 
1335 m
Median in ft: 
4380 ft
Soil Summary: 
soil survey information exists for about two-thirds of this ELT; : dominant soils are very shallow and shallow to bedrock, very gravelly sandy loam surfaces over extremely or very gravelly fine sandy loams, lack lime, and have little to modest soil development (organic matter accumulation), other less extensive soils are similar but have pronounced subsoil clay accumulations; unit dominated by Cochise County, Northwestern Part soil survey map units 71 (Romero-Rock outcrop complex, 5 to 60 percent slopes), 12 (Budlamp-Rock outcrop complex, 5 to 70 percent slopes) and 11 (Brunkcow-Chiricahua-Andrada complex, 3 to 20 percent slopes)
Geologic Materials: 
residuum, colluvium and alluvium associated with giotite granotoids of Happy Valley area (YXg); early Proterozoic Pinal Schist (Xp); and granodiorite (TKgd) which comprise 49%, 24% and 17% of the unit, respectively
Landforms: 
moderately to finely dissected, moderately to strongly incised mountain slopes and hills

ELT 29d

Elevation Range
Minimum: 
1084 m
Minimum in ft: 
3557 ft
Maximum: 
1223 m
Maximum in ft: 
4013 ft
Median: 
1144 m
Median in ft: 
3753 ft
Soil Summary: 
dominant soils are shallow and moderately deep to sandstone, phyllite and related rocks, coarse sandy loam, to extremely channery or gravelly loam surfaces over clay loam, extremely gravelly loam to extremely channery clay subsoils, lime may or may not be present, moderate to strong development (lime and clay accumulation), smaller areas of very deep recent alluvium with very and extremely gravelly sandy loams and sands also occur in the ELT; unit is dominated by Cochise County, Northwestern Part soil survey unit 46 (Grizzle-Rock outcrop complex, 10 to 50 percent slopes), Pima County soil survey map unit 23 (Deloro-Andrada complex, 5 to 35 percent slopes), and Cochise County, Northwestern Part soil survey unit 7 (Bodecker-Riverwash complex, 0 to 3 percent slopes). These units comprise 54%, 25% and 14% of the ELT
Geologic Materials: 
residuum, colluvium and alluvium associated with Mineta Sandstone (Tms); Mineta Conglomerate (Tmc); Tertiary sediments (Ts); Pinal Schist (Xp) and Quiburis Conglomerate which comprise 33%, 21%, 15%, 15% and 7% of the unit, respectively
Landforms: 
moderately to finely dissected, weakly to moderately incised mountain slopes and hills

ELT 29e

Elevation Range
Minimum: 
1094 m
Minimum in ft: 
3589 ft
Maximum: 
1290 m
Maximum in ft: 
4232 ft
Median: 
1211 m
Median in ft: 
3973 ft
Soil Summary: 
dominant soils are shallow to schist, very channery loams throughout, devoid of lime, no or little development; unit is dominated by Pima County soil survey map unit 74 (Schrap very channery loam, 5 to 30 percent slopes) and Cochise County, Northwestern Part soil survey unit 74 (Schrap-Rock outcrop complex, 5 to 65 percent slopes). These units comprise 57% and 30% of the ELT
Geologic Materials: 
residuum, colluvium and alluvium associated with Pinal Schist (Xp) which comprises 92% of the unit
Landforms: 
finely dissected, moderately to deeply incised mountain slopes and hills

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