Sections

Ecological Land Types within LTA 20.

ELT 20a

Elevation Range
Minimum: 
953 m
Minimum in ft: 
3125 ft
Maximum: 
1442 m
Maximum in ft: 
4730 ft
Median: 
1132 m
Median in ft: 
3714 ft
Soil Summary: 
dominant soils range from shallow to caliche hardpan to very deep, gravelly and very gravelly fine sandy loam surfaces over very gravelly fine sandy loam and very gravelly loam subsurface layers, limy throughout, moderately developed (lime accumulation); unit is dominated by Cochise County, Northwestern Part soil survey unit 61 (Mule-Sutherland complex, 5 to 45 percent slopes). This unit comprises 99% of the ELT
Geologic Materials: 
alluvium and residuum associated with Late Pliocene alluvium, widespread capping Quiburis basin (Tqf); Escabrosa-Horquilla tectonite (PMct); and Quiburis basin fill deposits, undivided (Tq) which comprise 63%, 21% and 10% of the unit, respectively
Landforms: 
finely dissected, moderately to deeply incised fan and pediment surfaces

ELT 20b

Elevation Range
Minimum: 
953 m
Minimum in ft: 
3125 ft
Maximum: 
1442 m
Maximum in ft: 
4730 ft
Median: 
1132 m
Median in ft: 
3714 ft
Soil Summary: 
dominant soils range from shallow to caliche hardpan to very deep, gravelly and very gravelly fine sandy loam surfaces over very gravelly fine sandy loam and very gravelly loam subsurface layers, limy throughout, moderately developed (lime accumulation); unit is dominated by Cochise County, Northwestern Part soil survey unit 61 (Mule-Sutherland complex, 5 to 45 percent slopes). This unit comprises 99% of the ELT
Geologic Materials: 
alluvium and residuum associated with Paige gravels (Tsv); deeply dissected basin fill veneer (QTs); Abrigo-Martin tectonite (Dmllat); and Escabrosa-Horquilla tectonite (PMct); which comprise 48%, 23%, 12% and 10% of the unit, respectively
Landforms: 
finely dissected, deeply incised fan and pediment surfaces

ELT 20c

Elevation Range
Minimum: 
953 m
Minimum in ft: 
3125 ft
Maximum: 
1442 m
Maximum in ft: 
4730 ft
Median: 
1132 m
Median in ft: 
3714 ft
Soil Summary: 
dominant soils range from shallow to caliche hardpan to very deep, sandy loam to very gravelly sandy loam and loam surfaces over gravelly, very gravelly, and extremely gravelly sandy loam and loam subsurface layers, are limy throughout, and have moderate to strong development (lime accumulation and cementation); unit is dominated by Cochise County, Northwestern Part soil survey unit 77 (Stagecoach-Whitlock-Delnorte, Chihuahuan, 5 to 20 percent slopes). This unit comprises 89% of the ELT
Geologic Materials: 
alluvium and residuum associated with Late Pliocene alluvium, widespread capping Quiburis basin (Tqf); Quiburis basin fill deposits, undivided (Tq); and Holocene alluvium (Qy2,Qy) which comprise 31%, 54% and 10 % of the unit, respectively
Landforms: 
moderately to finely dissected, weakly to moderately incised fan and pediment surfaces

ELT 20d

Elevation Range
Minimum: 
953 m
Minimum in ft: 
3125 ft
Maximum: 
1442 m
Maximum in ft: 
4730 ft
Median: 
1132 m
Median in ft: 
3714 ft
Soil Summary: 
dominant soils range from shallow to caliche hardpan to very deep, sandy loam to very gravelly sandy loam and loam surfaces over gravelly, very gravelly, and extremely gravelly sandy loam and loam subsurface layers, are limy throughout, and have moderate to strong development (lime accumulation and cementation); unit is dominated by Cochise County, Northwestern Part soil survey unit 77 (Stagecoach-Whitlock-Delnorte, Chihuahuan, 5 to 20 percent slopes). This unit comprises 97% of the ELT
Geologic Materials: 
alluvium and residuum associated with Quiburis basin fill deposits, undivided (Tq) and Holocene alluvium (Qy) which comprise 91% and 7% of the unit, respectively
Landforms: 
finely dissected, weakly incised fan and pediment surfaces

Catalina