LOCATION COBBLER ID

Established Series
Rev. GAH-BDG-EMM
06/2013

COBBLER SERIES

The Cobbler series consists of very deep, well drained soils on mountain slopes. They formed in colluvium and residuum from metamorphic rocks with an admixture of volcanic ash and loess. Saturated hydraulic conductivity is moderately high and slopes range from 15 to 80 percent. The average annual air temperature is about 43 degrees F. and the average annual precipitation is about 28 inches.

TAXONOMIC CLASS: Coarse-loamy, isotic, frigid Vitrandic Haploxerepts

TYPICAL PEDON: Cobbler ashy loam, forested, on a 55 percent slope with an east aspect (100 degrees), at 1,640 feet elevation. (Colors are for dry soil unless otherwise noted.)

Oi--0 to 3 inches; undecomposed and partially decomposed needles, twigs, leaves and grass.

Oe--3 to 4 inches; well decomposed needles, twigs, leaves and grass. (O horizons 0.5 to 4 inches thick)

A--4 to 7 inches; brown (10YR 5/3) ashy loam, dark brown (10YR 3/3) moist; weak fine and medium granular structure; soft, friable, nonsticky and nonplastic; many very fine and fine roots; many very fine and fine irregular pores; 5 percent fine mica flakes; 10 percent fine iron-manganese concretions; slightly acid (pH 6.5); clear smooth boundary. (3 to 5 inches thick)

AB--7 to 16 inches; yellowish brown (10YR 5/4) ashy loam, brown (10YR 4/3) moist; weak fine and medium subangular blocky structure; soft, friable, nonsticky and nonplastic; many fine and medium roots; many very fine and fine irregular pores; 5 percent subangular schist gravel; 10 percent fine mica flakes; 1 percent fine iron-manganese concretions; slightly acid (ph 6.4); clear smooth boundary. (0 to 9 inches thick)

Bw1--16 to 26 inches; light yellowish brown (10YR 6/4) gravelly sandy loam, brown (10YR 4/3) moist; weak medium and coarse subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; many fine to coarse roots; common very fine and fine irregular pores; 25 percent subangular schist gravel; 15 percent fine mica flakes; moderately acid (pH 5.9); abrupt wavy boundary. (7 to 14 inches thick)

Bw2--26 to 39 inches; brown (10YR 5/3) coarse sandy loam, dark yellowish brown (10YR 4/4) moist; weak medium and coarse subangular blocky structure; slightly hard, friable, nonsticky and slightly plastic; common fine and medium and few coarse roots; common very fine and fine irregular pores; 10 percent subangular schist gravel; 10 percent fine mica flakes; slightly acid (pH 6.3); clear wavy boundary. (13 to 17 inches thick)

Bw3--39 to 50 inches; pale brown (10YR 6/3) coarse sandy loam, yellowish brown (10YR 5/4) moist; weak medium and coarse subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common fine and medium and few coarse roots; common very fine irregular pores; 10 percent subangular schist gravel; 15 percent fine mica flakes; slightly acid (pH 6.1); clear wavy boundary. (0 to 11 inches thick)

C1--50 to 59 inches; light yellowish brown (10YR 6/4) sandy loam, yellowish brown (10YR 5/4) moist; weak fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; common very fine and fine roots; common very fine irregular pores; 10 percent subangular schist gravel; 20 percent fine mica flakes; moderately acid (pH 5.8); gradual wavy boundary. (9 to 12 inches thick)

C2--59 to 68 inches; light yellowish brown (10YR 6/4) loamy sand, yellowish brown (10YR 5/4) moist; massive; few very fine roots; few very fine irregular pores; 10 percent subangular schist gravel; 20 percent fine mica flakes; moderately acid (pH 5.7).

TYPE LOCATION: Clearwater County, Idaho; about 11 miles northeast of Orofino, Idaho; about 300 feet south and 1,150 feet west of the northeast corner of section 22, T.38N., R.3E.; Latitude - 46 degrees, 37 minutes, 44 seconds North; Longitude - 116 degrees, 3 minutes, 21 25.0 seconds west. UTM Zone 11; 517290.9m E, 5164329.4m N. Little Green Mountain Quadrangle.

RANGE IN CHARACTERISTICS:
Soil moisture - Usually dry for more than 45 consecutive days (mid July to mid September).
Xeric moisture regime.
Average annual soil temperature - 41 to 46 degrees F. (Frigid temperature regime)

A and AB horizons
Hue - 7.5YR or 10YR dry or moist
Value - 4 or 5 dry, 2.5 to 4 moist
Chroma - 2 or 3 dry or moist
Clay content - 8 to 16 percent
Rock fragment content - 0 to 15 percent gravel
Reaction - 5.3 to 6.1

Bw horizons
Hue - 7.5YR or 10YR dry, 5YR to 10YR moist
Value - 5 or 6 dry and 3 to 5 moist
Chroma - 3 or 4 dry or moist
Texture - loam, sandy loam, or coarse sandy loam
Clay content - 6 to 17 percent
Rock fragment content - 5 to 25 percent gravel, 0 to 10 percent cobbles, 0 to 5 percent channers, 5 to 40 percent total rock fragment content
Reaction - 5.3 to 6.3

BC horizon present in some pedons.

C horizons
Hue - 7.5YR to 2.5Y
Value - 5 or 6 dry, 3 to 7 moist
Chroma - 3 or 4 dry, 3 to 6 moist
Texture - loam, sandy loam, coarse sandy loam, or loamy sand
Clay content - 5 to 16 percent
Rock fragment content - 5 to 35 percent gravel, 0 to 10 percent cobbles, 5 to 40 percent total rock fragment content
Reaction - 5.3 to 5.8

COMPETING SERIES:

Ardenmont soils: are deep to a paralithic contact

Downygulch soils: are moderately deep to a lithic contact

Enson soils: have a lithologic discontinuity below the zone of ash influence and have dense till below 40 inches

Green Bluff soils: have lamellae and distinct clay films in E&Bt horizons

Labuck soils are moderately deep to a paralithic contact

Micapeak soils: are moderately deep to a paralithic contact

Quinnamose soils: are deep to a paralithic contact

Stapaloop soils: formed in till or outwash and have lamellae in the lower part of the particle size control section.

GEOGRAPHIC SETTING: Cobbler soils are on mountain slopes. These soils formed in colluvium and residuum weathered from schist, gneiss, granite and quartzite with an admixture of loess and volcanic ash. Elevation ranges from 1,600 to 5,000 feet (448 to 1524 meters). Slopes are 15 to 80 percent. The average annual temperature is 40 to 46 degrees F. and the average annual precipitation is 25 to 45 inches (635 to 1143 mm). The average frost free period is 80 to 130 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aldermand, Noil, Poorman and Uvi soils. All these soils are on mountain side slopes. Aldermand soils have a udic soil moisture regime. Noil soils have a loamy-skeletal control section. Poorman soils are paramicaceous. Uvi soils have a fine loamy control section.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained; saturated hydraulic conductivity is moderately high.

USE AND VEGETATION: These soils are used for timber production, livestock grazing, wildlife habitat and watershed. Potential natural vegetation is mainly grand fir, Douglas-fir and Ponderosa pine with an understory of mallow ninebark, creambush oceanspray, Rocky mountain maple, common snowberry, goldthread, starry false Solomons-seal and Columbia brome.

DISTRIBUTION AND EXTENT: North central Idaho; this soil is not extensive. MLRA 43A.

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

SERIES ESTABLISHED: Clearwater County, Idaho, 2003.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon - the zone from 4 to 7 inches; (A horizon)

Cambic horizon - the zone from 16 to 50 inches; (Bw1, Bw2 and Bw3 horizons)

Vitrandic feature - the zone from 4 to 16 inches; (A and AB horizons)

Particle size control section - the zone from 14 to 44 inches; (part of the AB, the Bw1, Bw2 and part of the Bw3 horizons)

National Cooperative Soil Survey
U.S.A.