LOCATION TEXASCREEK ID

Established Series
Rev. BLR/BDG/EMM
07/2013

TEXASCREEK SERIES

The Texascreek series consists of moderately deep, well drained soils formed in loess and residuum and/or colluvium from granitic or metamorphic rocks. They are on mountain slopes and canyon sides of plateaus. Permeability is moderate and slopes range from 15 to 75 percent. The average annual precipitation is about 25 inches and the average annual temperature is about 50 degrees F.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Ultic Haploxerolls

TYPICAL PEDON: Texascreek loam, forested, on a 74 percent slope at 1,840 feet elevation. Aspect is west. (Colors are for dry soil unless otherwise noted).

Oi--0 to 1 inch; needles, leaves, and twigs (0 to 2 inches thick)

A1--1 to 3 inches; dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; slightly hard, friable, slightly sticky and nonplastic; many very fine, fine, and medium roots; many very fine and fine irregular pores; neutral (pH 6.6); clear smooth boundary.

A2--3 to 8 inches; dark grayish brown (10YR 4/2) loam, very dark grayish brown (10YR 3/2) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; many very fine, fine, and medium roots; many very fine and fine irregular pores; neutral (pH 6.6); clear wavy boundary. (A horizons 7 to 14 inches thick)

BA--8 to 13 inches; brown (10YR 4/3) loam, very dark grayish brown (10YR 3/2) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common medium and few coarse roots; many very fine and fine irregular and few very fine tubular pores; 5 percent gravel; slightly acid (pH 6.5); gradual wavy boundary. (0 to 10 inches thick)

Bw1--13 to 19 inches; dark yellowish brown (10YR 4/4) gravelly loam, dark yellowish brown (10YR 3/4) moist; moderate medium and coarse subangular blocky structure; slighty hard, friable, slightly sticky and slightly plastic; many very fine, common medium, and few coarse roots; many very fine and fine irregular, and few very fine tubular pores; 25 percent gravel; common faint clay films bridging sand grains on surfaces of gravel; slightly acid (pH 6.4); gradual smooth boundary.

Bw2--19 to 25 inches; dark yellowish brown (10YR 4/4) gravelly loam, dark yellowish brown (10YR 3/4) moist; weak fine and medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common medium roots; many very fine and fine irregular and few very fine tubular pores; 25 percent gravel; common faint clay films bridging sand grains on surfaces of gravel; slightly acid (pH 6.2); gradual wavy boundary. (Bw horizons 8 to 15 inches thick)

C1--25 to 33 inches; yellowish brown (10YR 5/4) gravelly sandy loam, dark yellowish brown (10YR 3/4) moist; massive; hard, friable, nonsticky and nonplastic; few fine and medium roots; many very fine and fine irregular pores; 25 percent gravel; common faint clay films bridging sand grains on surfaces of gravel; moderately acid (pH 6.0); gradual wavy boundary. (8 to 21 inches thick)

Cr--33 inches; highly decomposed granitic schist; 40 percent is hard bedrock with few faint clay films occurring on bedrock surfaces.

TYPE LOCATION: Clearwater County, Idaho; about 1 mile south of Ahsahka, Idaho; about 2,560 feet north and 1,000 feet west of the southeast corner of section 4, T.36 N., R.1 E.; Latitude - 46 degrees, 29 minutes, 33 seconds North; Longitude - 116 degrees, 19 minutes, 42 seconds West. USGS Orofino West quadrangle.

RANGE IN CHARACTERISTICS:

Average annual soil temperature - 47 to 54 degrees F.
Mesic temperature regime
Depth to paralithic contact - 20 to 40 inches
Thickness of mollic epipedon - 10 to 14 inches
Base saturation - 60 to 75 percent in the 10 to 30 inch zone
Soil moisture control section - dry 45 to 60 consecutive days following the summer solstice.
Xeric moisture regime

A horizons: (AB, BA horizons included)
Hue - 10YR or 7.5YR moist
Value - 4 or 5 dry, 2 to 4 moist
Chroma - 2 or 3 dry, 1 to 4 moist
Texture - loam, sandy loam or coarse sandy loam
Clay content - 8 to 18 percent
Rock fragments - 0 to 10 percent gravel
Reaction - moderately acid to neutral

Bw horizons:
Hue - 2.5Y to 7.5YR moist
Value - 4 to 6 dry, 3 to 5 moist
Chroma - 3 or 4 dry, 2 to 4 moist
Textures - loam, sandy loam, coarse sandy loam or loamy sand
Clay content - 5 to 19 percent
Rock fragments - 5 to 25 percent gravel, 0 to 10 percent cobbles, 5 to 30 percent total rock fragments
Reaction - moderately acid to neutral

C horizon:
Hue - 10YR to 7.5YR moist
Value - 5 or 6 dry, 3 to 6 moist
Chroma - 3 to 5 dry, 2 to 6 moist
Textures - sandy loam, coarse sandy loam, loamy sand or loamy coarse sand
Clay content - 3 to 15 percent
Rock fragments - 5 to 40 percent gravel, 0 to 15 percent cobbles, 5 to 45 percent total rock fragments
Reaction - moderately acid to neutral

COMPETING SERIES:
Ardening - are deep to a paralithic contact
Billyridge - are very deep
Burrant - are very deep
Canderly - are very deep
Catelli - have an average annual soil temperature of 56 to 58 degrees F. Crouch - are deep to a paralithic contact
Deerrun - are moderately deep to a lithic contact
Ginnis - are dry 90 to 105 consecutive days following the summer solstice
Hellgate - are very deep
Picard - are very deep
Rebecca - are very deep
Roney - are moderately deep to a lithic contact
Shangland - are dry 60 to 80 consecutive days following the summer solstice
Wind River - are very deep

GEOGRAPHIC SETTING: Texascreek soils are on mountain slopes and canyon sides of plateaus at elevations of 1,000 to 4,000 feet with slopes of 15 to 75 percent. These soils are formed in loess and weathered granitic or metamorphic residuum and/or colluvium. The average annual temperature is 45 to 52 degrees F. and the average precipitation is 24 to 45 inches. The frost free season is 90 to 180 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Johnson, Uvi, and Whiskeycreek series. Johnson soils are on concave north-facing canyon side slopes and are deep with argillic horizons. Uvi soils are on southeast-facing canyon side slopes and are very deep. Whiskeycreek soils are on convex canyon side slopes and are shallow.

DRAINAGE AND PERMEABILITY: Well drained, very rapid runoff, moderate permeability.

USE AND VEGETATION: These soils are used for timber production, livestock grazing, wildlife habitat, watershed, and recreation. Potential natural vegetation is Douglas-fir, ponderosa pine, with an understory of common snowberry, white spiraea, elk sedge, Idaho fescue, low oregongrape, and baldhip rose. It is ponderosa pine with an understory of Idaho fescue, bluebunch wheatgrass, and pine reedgrass on dry sites.

DISTRIBUTION AND EXTENT: North Central Idaho, Texascreek soils are not extensive. MLRA 43A.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Clearwater County, Idaho, 2003.

REMARKS: Diagnostic horizons and other features recognized in this pedon area:

Mollic epipedon - The zone from 1 to 13 inches (A and BA horizons).

Cambic horizon - The zone 13 to 25 inches (Bw horizons).

Particle size control section - The zone from 10 to 33 inches (part of the BA horizon, Bw horizons, and C horizon).

National Cooperative Soil Survey
U.S.A.