110 Classification of the Soils – Anniecreek Series

Classification of the Soils
Anniecreek Series

 Depth class: Very deep

Drainage class: Somewhat poorly drained

Permeability: Rapid

Position on landscape: Stream terraces

Parent material: Pumice and ash

Slope range: 0 to 2 percent

Elevation: 4,100 to 5,500 feet

Average annual precipitation: 25 to 40 inches

Average annual air temperature: 40 to 42 degrees F

Frequency of flooding: Occasional

Frost-free period: 10 to 50 days

 Taxonomic class: Ashy, glassy Aquic Vitricryands

Typical Pedon

Oi—0 to 4 inches; mat of slightly decomposed needles; abrupt wavy boundary.

A1—4 to 12 inches; very dark grayish brown (10YR 3/2) ashy fine sandy loam, dark grayish brown (2.5Y 4/2) dry; weak medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine roots; many very fine irregular pores; about 5 percent pumice paragravel; slightly acid (pH 6.4); clear smooth boundary.

2A2—12 to 24 inches; very dark gray (10YR 3/1) very gravelly ashy sand, dark gray (10YR 4/1) dry; single grain; loose, nonsticky and nonplastic; many very fine irregular pores; about 10 percent pumice paragravel and 40 percent gravel; neutral (pH 7.0); abrupt smooth boundary.

3Ab—24 to 32 inches; dark grayish brown (10YR 4/2) and very dark gray (10YR 3/1) stratified ashy fine sand and ashy sand, grayish brown (10YR 5/2) and light brownish gray (10YR 6/2) dry; many fine prominent strong brown (7.5YR 4/6) soft iron masses and many fine prominent black (10YR 2/1) soft manganese masses; massive; soft, very friable, nonsticky and slightly plastic; few very fine roots; few very fine tubular pores; about 1 percent gravel; neutral (pH 6.6); clear smooth boundary.

4Bg1—32 to 55 inches; black (N 2.5/0) ashy sand, dark gray (2.5Y 4/1) dry; massive; soft, very friable, nonsticky and nonplastic; many very fine irregular pores; about 5 percent gravel; moderately acid (pH 5.6); clear smooth boundary.

5Bg2—55 to 71 inches; black (N 2.5/0) very gravelly ashy coarse sand, variegated dry; common coarse distinct strong brown (7.5YR 4/6) soft iron accumulations; single grain; loose, nonsticky and nonplastic; many very fine irregular pores; about 40 percent gravel; neutral (pH 6.8).

 Typical Pedon Location

 Map unit in which located: Anniecreek-Stirfry-Riverwash complex, 0 to 2 percent slopes

Location in park: Anne Creek stream terraces in the “panhandle” in Klamath County; in the SE1/4NW1/4 of sec. 32, T. 31 S., R. 7 E.; 588852 meters easting and 4743947 meters northing, UTM Zone 10T, NAD 27

 Range in Characteristics

 Profile:

Depth to bedrock—more than 60 inches

Time of year water table is at a depth of less than 60 inches—March through June

Depth to redoximorphic features—20 to 35 inches

Thickness of umbric epipedon—15 to 25 inches

Content of clay—0 to 15 percent

Content of rock fragments in upper 40 inches of mineral soil—10 to 35 percent

 A and 2A horizons:

Hue—10YR to 2.5Y

Value—2 or 3 moist, 3 to 5 dry

Chroma—1 or 2 moist, 1 to 3 dry

3Ab horizon:

Hue—10YR or 7.5YR

Value—2 to 4 moist, 4 or 5 dry

Chroma—1 to 3 moist or dry

Texture—variable, including medial very fine sandy loam, loamy coarse sand, ashy sand, and ashy fine sand

AC horizon (where present):

Hue—10YR to 2.5Y

Value—2 to 4 moist, 4 to 6 dry

Texture—ashy fine sandy loam, loamy sand, or sand

4B and 5B horizons:

Hue—neutral

Value—2.5 to 4 moist, 4 or 5 dry

Chroma—0 to 3 moist, 2 to 4 dry

Content of pumice paragravel—0 to 20 percent

Content of rock fragments—0 to 70 percent

Texture—ashy or medial and variable, including sand, loamy sand, and coarse sand

 

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