ELT 156a

Area: 
378 ha
Area in acres: 
935 acres
Elevation Range
Minimum: 
1899 m
Minimum in ft: 
6230 ft
Maximum: 
2472 m
Maximum in ft: 
8109 ft
Median: 
2218 m
Median in ft: 
7277 ft
Soil Summary: 
detailed soil survey information is not available for this unit; correlates with GES unit 476 characterized by extremely cobbly sandy loams shallow to deep to granite or granite-like bedrock, acid soils lacking lime throughout, minimal soil development, and associated rock outcroppings
Geologic Materials: 
slope alluvium, colluvium and residuum associated mostly (90%) associated with Leatherwood quartz diorite (Kqdl). The unit is also influenced by metasedimentary and sedimentary rocks associated with Bolsa Quartzite and Abrigo Formations (Cba) and Middle Proterozoic Apache Group and Troy Quartzite (Ya). They comprise 6% and 4% of the unit, respectively
Landforms: 
coarsely dissected mountain slopes with shallow to moderate drainage incision
LTA 156
Madrean pine-oak forest/woodland on mountains derived from granite, gneiss, and similar rocks

Map with the ELT 156a polygon highlighted.Photo Point 159Photo Point 006Photo Point 266Photo Point 270Photo Point 269Photo Point 268Photo Point 161, Photo Point 162Photo Point 160Photo Point 165Photo Point 300

Landform position classes and corresponding vegetation*

Landform Class Areasort icon Percentage of ELT Vegetation and notes
cool aspect scarps, cliffs, canyons 6 ha 2

Doug fir/SW Pine/Ponderosa Pine
gently sloping ridges and hills 14 ha 4

Ponderosa Pine/SW Pine/Ceanothus
very moist steep slopes 59 ha 16

Doug fir/SW Pine/Ponderosa Pine
moderately dry steep slopes 103 ha 27

Silverleaf Oak/Ponderosa Pine/Ceanothus
moderately moist steep slopes 190 ha 50

Doug fir/SW Pine/Ponderosa Pine

*Vegetation estimates are based on field observations, data from photo points, and the ReGAP map (http://earth.gis.usu.edu/swgap/).

Region 3 Mid-Scale Vegetation Cover Classes

Cover Class Areasort icon Percentage of ELT
Sparsely vegetated, <10% vegetative cover (includes areas of high severity burns, 2002-03) 51 ha 14
Tree cc 10 - 29.9% 73 ha 19
Tree cc 30+% 253 ha 67

Catalina