Classification of the Soils
Llaorock Series
Depth class: Very deep
Drainage class: Somewhat excessively drained
Permeability: Rapid
Location in park: About 1/2 mile east of the end of Forest Service Road 800 (from Forest Service Road 60 take Forest Service Road 900 to Forest Service Road 800); 560224 meters easting and 4743157 meters northing, UTM Zone 10T, NAD 27
Range in Characteristics
Profile:
Depth to bedrock—more than 60 inches
Average content of rock fragments—more than 50 percent andesite cobbles, stones, and boulders
Percentage of surface covered with stones and boulders—as much as 30 percent
A and AB horizons:
Hue—7.5YR or 10YR
Value—3 or 4 moist, 4 or 5 dry
Chroma—2 to 4 moist or dry
Texture—gravelly ashy sandy loam or gravelly ashy loamy sand
Content of gravel—10 to 20 percent
Content of pumice gravel—0 to 5 percent
Content of cobbles—0 to 10 percent
Content of stones—0 to 5 percent
Content of boulders—0 to 2 percent
Bw horizon:
Value—3 or 4 moist, 5 or 6 dry
Texture—medial loamy sand or medial sandy loam
Content of gravel—0 to 20 percent
Content of cobbles—10 to 30 percent
Content of stones—20 to 50 percent
Content of boulders—0 to 10 percent
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