Sections

Ecological Land Types within LTA 17.

ELT 17a

Elevation Range
Minimum: 
1013 m
Minimum in ft: 
3323 ft
Maximum: 
1479 m
Maximum in ft: 
4853 ft
Median: 
1244 m
Median in ft: 
4081 ft
Soil Summary: 
shallow to bedrock, very gravelly loam surface over extremely cobbly loam, limy, little or no development; dominated by Cochise County, Northwestern Part soil survey map unit 57 (Mabray-Rock outcrop complex, 5 to 70 percent slopes). This unit comprises 99% of the ELT
Geologic Materials: 
alluvium, colluvium and residuum associated with Horquilla (?)-Earp(?) tectonite (Pleht); Horquilla Formation (Ph); and tectonite derived from Devonian and Cambrian sedimentary rocks (TDCt) which comprise 88%, 3% and 2% of the unit, respectively
Landforms: 
coarsely to moderately dissected, moderately incised mountain slopes

ELT 17b

Elevation Range
Minimum: 
1075 m
Minimum in ft: 
3528 ft
Maximum: 
1575 m
Maximum in ft: 
5168 ft
Median: 
1343 m
Median in ft: 
4406 ft
Soil Summary: 
soil survey data coverage is incomplete for this ELT; mapped areas are dominantly shallow to limestone and similar rock types, very gravelly loams over extremely cobbly loams, limy throughout, weak development, some areas of limy very deep gravelly and very gravelly sandy loams and loamy sands also occur in the unit; mapped areas are dominated by Cochise County, Northwestern Part soil survey map units 57 (Mabray-Rock outcrop complex, 5 to 70 percent slopes) and 83 (Tombstone-Stronghold complex, 5 to 30 percent slopes)
Geologic Materials: 
alluvium, colluvium and residuum associated with Horquilla Formation (Ph); Escabrosa and Martin Formations (MDc); Bolsa Quartzite and Abrigo Formation (Cba); Earp, Colina, Epitaph, undivided (PPs); basin fill, not tilted, may include some Paige Grave (QTs); and Earp Formation (PPe) which comprise 33%, 24%, 18%, 8%, 5% and 4% of the unit, respectively
Landforms: 
moderately to finely dissected, moderately to deeply incised mountain slopes

ELT 17c

Elevation Range
Minimum: 
1097 m
Minimum in ft: 
3599 ft
Maximum: 
1514 m
Maximum in ft: 
4966 ft
Median: 
1287 m
Median in ft: 
4222 ft
Soil Summary: 
shallow to bedrock, very gravelly loam surface over extremely cobbly loam, limy, little or no development; dominated by Cochise County, Northwestern Part soil survey map unit 57 (Mabray-Rock outcrop complex, 5 to 70 percent slopes). This unit comprises 99% of the ELT
Geologic Materials: 
alluvium, colluvium and residuum associated with Escabrosa-Horquilla tectonite (PMct); Horquilla (?)-Earp (?) tectonite (Pleht); tectonite derived from Devonian and Cambrian sedimentary rocks (TDCt); Abrigo-Martin tectonite (Dmllat); and Earp tectonites (Plet) which comprise 62%, 16%, 6% and 5% of the unit, respectively
Landforms: 
finely dissected, moderately to deeply incised mountain slopes

ELT 17d

Elevation Range
Minimum: 
1083 m
Minimum in ft: 
3552 ft
Maximum: 
1386 m
Maximum in ft: 
4548 ft
Median: 
1226 m
Median in ft: 
4022 ft
Soil Summary: 
soil survey data coverage is incomplete for this ELT; mapped areas are dominantly shallow to limestone and similar rock types, very gravelly loams over extremely cobbly loams, limy throughout, weak development; mapped areas are dominated by Cochise County, Northwestern Part soil survey map unit 57 (Mabray-Rock outcrop complex, 5 to 70 percent slopes)
Geologic Materials: 
alluvium, colluvium and residuum associated with granite of Red Rock Canyon (YXgr); Horquilla (?)-Earp(?) tectonite (Pleht); Bolsa Quartzite and Abrigo Formation (Cba); tectonite derived from Devonian and Cambrian sedimentary rocks (TDCt); and amphibolite after Apache Diabase (TYd) which comprise 68%, 6%, 5%, 5% and 5% of the unit, respectively
Landforms: 
coarsely to moderately dissected, weakly incised mountain slopes

ELT 17e

Elevation Range
Minimum: 
1085 m
Minimum in ft: 
3559 ft
Maximum: 
1529 m
Maximum in ft: 
5015 ft
Median: 
1347 m
Median in ft: 
4419 ft
Soil Summary: 
soil survey data coverage is incomplete for this ELT
Geologic Materials: 
alluvium, colluvium and residuum associated with Horquilla (?)-Earp(?) tectonite (Pleht); tectonite derived from Devonian and Cambrian sedimentary rocks (TDCt); mixed marble, Pinal Schist and porphyritic biotite granite (PXgn); tectonite (Pls); granodiorite of Happy Valley (Tgh); and metamorphosed Pinal Schist (KXpm) which comprise 23%, 19%, 19%, 12%, 9%, and 9% of the unit, respectively
Landforms: 
moderately dissected, moderately to deeply incised mountain slopes

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