ELT 171a

Elevation Range
963 m
Minimum in ft: 
3159 ft
1291 m
Maximum in ft: 
4236 ft
1081 m
Median in ft: 
3547 ft
Soil Summary: 
dominant soils are very deep, very gravelly fine sandy loam over very gravelly sandy clay loam subsoils or very gravelly and gravelly sandy loam subsurface layers, lime within a foot of the soil surface or throughout, moderate development (clay and/or lime accumulation); other soils are shallow and moderately deep to a caliche hardpan, have very gravelly sandy loam surfaces over very and extremely gravelly sandy loam and sandy clay loam subsurface layers, are limy throughout and have strong development (lime accumulation and cementation); unit dominated by Pima County soil survey map units 51 (Nolam-Tombstone complex, 8 to 30 percent slopes), 79 (Tombstone very gravelly loam, 15 to 50 percent slopes) and 65 (Powerline-Kimrose family complex, 10 to 35 percent slopes). These units comprise 40%, 31% and 12% of the ELT, respectively
Geologic Materials: 
alluvium and residuum associated with sandstone, siltstone, and conglomerate, undivided (QTs); middle to late Pleistocene piedmont alluvium, undivided (Q1); and Paleozoic sediments (P3s) which comprise 75%, 14% and 6% of the unit, respectively
mostly undissected and coarsely dissected, weakly incised fan and pediment surfaces (upper portion of unit is moderately dissected, moderately to deeply incised)