Ecological Land Type

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

Land Type Association: LTA 156

Ecological Unit: Madrean pine-oak forest/woodland on mountains derived from granite, gneiss, and similar rocks

Map with the ELT 156a polygon highlighted.

Landform position classes and corresponding vegetation*

Landform Class	Area	Percentage of ELT	Vegetation and notes
moderately moist steep slopes	190 ha	50	Doug fir/SW Pine/Ponderosa Pine
gently sloping ridges and hills	14 ha	4	Ponderosa Pine/SW Pine/Ceanothus
moderately dry steep slopes	103 ha	27	Silverleaf Oak/Ponderosa Pine/Ceanothus
cool aspect scarps, cliffs, canyons	6 ha	2	Doug fir/SW Pine/Ponderosa Pine
very moist steep slopes	59 ha	16	Doug fir/SW Pine/Ponderosa Pine

Region 3 Mid-Scale Vegetation Cover Classes

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