118 Classification of the Soils – Llaorock Series

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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