62 49—Stirfry-Grousehill complex, 0 to 10 percent slopes

49—Stirfry-Grousehill complex, 0 to 10 percent slopes

 Map Unit Setting

 General location: Bogs and seeps

Major land resource area (MLRA): 3

Elevation: 4,800 to 5,500 feet

Average annual precipitation: 50 to 70 inches

Average annual air temperature: 38 to 42 degrees F

Frost-free period: 0 to 50 days

 Map Unit Composition

 Stirfry and similar soils: 40 percent

Grousehill and similar soils: 40 percent

Minor components: 20 percent

 Characteristics of the Stirfry and Similar Soils

 Setting

 Landform: Drainageway

Geomorphic position: Bogs and seeps in mountain basins and drainageways

Parent material: Mossy organic material over ash, pumice, and andesite fragments

Properties and qualities

 Slope: 0 to 10 percent

Percentage of surface covered with stones and boulders: None

Restrictive features: None within a depth of 60 inches

Depth to mineral soil: 20 to 40 inches

Drainage class: Very poorly drained

Permeability: Moderately rapid or rapid

Flooding: Not present

Water table: Present (see table 20)

Ponding: Not present

Available water capacity: About 9 inches

 Interpretive groups

 Ecological site: Rangeland—(003XY018OR) Woodland Fen 40-60 PZ

 Typical profile

 Oe—0 to 2 inches; peat

Oa1—2 to 12 inches; mucky peat

Oa2—12 to 26 inches; mucky peat

2C1—26 to 30 inches; mucky ashy sandy loam

2C2—30 to 60 inches; very gravelly mucky ashy loamy coarse sand

 Characteristics of the Grousehill and Similar Soils

 Setting

 Landform: Moraine

Geomorphic position: Glacial moraines in valleys

Parent material: Ash over glacial till

 Properties and qualities

 Slope: 0 to 10 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—(003XY709OR) Pseudotsuga menziesii/Vaccinium membranaceum/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; cemented very cobbly medial sandy loam

 Characteristics of the Minor Components

 Stirfry soils

 Percentage of map unit: 10 percent

Landform: Drainageway

Geomorphic position: Mossy organic material to a depth of 40 to 60 inches in bogs and seeps

 Mariel soils

 Percentage of map unit: 5 percent

Landform: Drainageway

Geomorphic position: Sphagnum moss and organic material in seeps and bogs

 Umak soils

 Percentage of map unit: 5 percent

Landform: Ashflow

Geomorphic position: Pumice and ash deposits in valleys

 Major Soil Features and Properties Affecting Management

 Stirfry soil

 • Wetness

• Organic soil material over mineral soil material

• Frost hazard

 Grousehill soil

• Rock fragments on surface

• Rock fragments in soil profile

• Depth to hardpan

Crater Lake National Park, Oregon 69

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