Detailed Soil Map Units
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22—Grousehill gravelly medial loam, 0 to 25 percent slopes
Map Unit Setting
General location: Glaciated side slopes and summits of mountains and ridges
Major land resource area (MLRA): 3
Elevation: 4,500 to 7,000 feet
Average annual precipitation: 50 to 70 inches
Average annual air temperature: 38 to 42 degrees F
Frost-free period: 10 to 35 days
Map Unit Composition
Grousehill and similar soils:
85 percent
Minor components: 15 percent
Characteristics of the Grousehill and Similar Soils
Setting
Landform: Ground moraine
Geomorphic position: Glacial moraine on summits of ridges
Parent material: Ash over glacial till
Properties and qualities
Slope: 0 to 25 percent
Percentage of surface covered with stones and boulders: 3 percent
Restrictive feature: Duripan at a depth of 20 to 40 inches
Drainage class: Moderately well drained
Permeability: Moderate
Flooding: Not present
Water table: Present (see
table 20)
Ponding: Not present
Available water capacity: About 12.8 inches
Interpretive groups
Ecological site: Forestland—(003XY701OR) Tsuga mertensiana/Vaccinium scoparium/Chimaphila umbellata
Typical profile
Oi—0 to 3 inches; slightly decomposed plant material
A—3 to 10 inches; gravelly medial loam
Bw1—10 to 31 inches; very cobbly medial loam
Bw2—31 to 39 inches; very cobbly medial loam
Bqm—39 to 56 inches; moderately cemented duripan
Characteristics of the Minor Components
Castlecrest soils
Percentage of map unit: 10 percent
Landform: Stratovolcano
Geomorphic position: Ashfall deposits on summits and side slopes of mountains
Llaorock soils
Percentage of map unit: 3 percent
Landform: Lava flow
Geomorphic position: Ash mixed with residuum and colluvium derived from andesite on summits and side slopes of mountains
Racing soils
Percentage of map unit: 2 percent
Landform: Drainageway
Geomorphic position: Depressions on glaciated ridges
Major Soil Features and Properties Affecting Management
Grousehill soil
• Rock fragments on surface
• Rock fragments in soil profile
• Depth to hardpan
• Wetness
