17 Soils That Are on Uplands and Formed in Airfall-Deposited Ash and Pumice Over Glacial Deposits

Soil Survey of Crater Lake National Park, Oregon 

General Soil Map Units

Soils That Are on Uplands and Formed in Airfall-Deposited Ash and Pumice Over Glacial Deposits

Number of map units: 2

Percentage of park: 10 percent

10. Redcone-Cinder land

Percentage of park: 3 percent

Location in park: Cinder cones throughout park

Slope range: 30 to 60 percent

Elevation: 5,500 to 7,500 feet

Average annual precipitation: 50 to 70 inches

Average annual air temperature: 38 to 42 degrees F

Frost-free period: 0 to 50 days

Minor components: 5 percent Rock outcrop and 5 percent Timbercrater soils

Redcone soils

Depth class: Moderately deep to a duripan

Drainage class: Somewhat excessively drained

Permeability: Rapid over moderate

Position on landscape: Cinder cones

Parent material: Cinders and ash

Surface texture: Very gravelly ashy sandy loam

Subsoil texture: Very gravelly ashy coarse sandy loam

Cinder land

Kind of rock: Andesite and basaltic andesite cinders

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