LOCATION GRANILE CO+WYEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Ustic Glossocryalfs
TYPICAL PEDON: Granile gravelly sandy loam - forest. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 1 inch slightly decomposed bark, needles, twigs and leaves. (1 to 2 inches thick)
E--1 to 10 inches; pinkish gray (7.5YR 6/2) gravelly sandy loam, dark brown (7.5YR 4/2) moist; weak medium platy structure parting to fine granular; soft, very friable, nonsticky; 30 percent gravel; slightly acid; clear smooth boundary. (4 to 12 inches thick)
E/B--10 to 19 inches; pinkish gray (7.5YR 6/2), brown (7.5YR 4/2) moist (E); brown (7.5YR 5/4) brown (7.5YR 4/4) moist (Bt) very gravelly sandy clay loam (composite texture), weak fine subangular blocky structure parting to moderate fine granular; slightly hard, very friable, slightly sticky and slightly plastic; faint patchy clay films on some ped faces and in some root channels and pores; this horizon consists of clayey material like that of the underlying horizon embedded in a matrix like that of the overlying horizon; 40 percent gravel; slightly acid; gradual wavy boundary. (4 to 14 inches thick.)
Bt--19 to 35 inches; brown (7.5YR 5/4) very gravelly sandy clay loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; faint nearly continuous clay films on faces of peds and in root channels and pores; 60 percent gravel; slightly acid; gradual wavy boundary. (8 to 22 inches thick)
BCt--35 to 42 inches; brown (7.5YR 5/4) extremely gravelly sandy clay loam, brown (7.5YR 4/4) moist; weak medium subangular blocky structure; very hard, friable, slightly sticky and slightly plastic; faint patchy clay films on some faces of peds and in some root channels and pores; 70 percent gravel; neutral; gradual wavy boundary. (4 to 12 inches thick)
C--42 to 61 inches; brown (7.5YR 5/4) extremely gravelly sandy loam; brown (7.5YR 4/4) moist; massive; very hard, very friable, slightly sticky and slightly plastic; 70 percent gravel; neutral.
TYPE LOCATION: Chaffee County, Colorado; .1 mile E and .1 mile N of the SW corner of Sec. 32, T 11 S., R 79 W.
RANGE IN CHARACTERISTICS: (Depths given are measured from the mineral soil surface)
Soil moisture: udic moisture regime bordering on ustic
Mean annual soil temperature: 37 to 40 degrees F.
Depth to the upper boundary of the argillic horizon: 10 to 24 inches
Depth to the base of the argillic horizon: 17 to 50 inches
Mica content: 15 to 30 percent (by grain count)
A horizon (present in some pedons)
Hue: 2.5Y through 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 1 or 2.
E horizon
Hue: 2.5Y through 7.5YR
Value: 5 through 8 dry, 3 through 7 moist
Chroma: 1 to 3
Texture: gravelly sandy loam, very gravelly coarse sandy loam
Rock fragment content: 25 to 50 percent, mostly gravel
Reaction: strongly acid to slightly acid
Bt horizon
Hue: 2.5Y through 7.5YR
Value: 5 through 7 dry, 4 through 6 moist
Chroma: 1 to 6
Texture: sandy clay loam, loam, or clay loam; with very gravelly, very cobbly, extremely gravelly, or extremely cobbly modifiers
Clay content: 18 to 35 percent
Silt content: 5 to 55 percent
Sand content; 20 to 75 percent
Rock fragment content: 35 to 80 percent, mostly gravel and cobble
Base saturation: 60 to 100 percent in all subhorizons
Reaction: strongly acid to slightly acid
C horizon (a BC horizon in some pedons)
Hue: 2.5Y through 7.5YR.
Texture: very gravelly sandy loam, extremely gravelly sandy loam. very gravelly sandy clay loam, very gravelly coarse sandy loam
Clay content: 15 to 27 percent
Content of fine or coarser sand: more than 35 percent
Reaction: moderately acid to slightly alkaline
COMPETING SERIES: These are the Gambler, Hollandlake, Kurrie, Larand, Leadville, Tolvar series. Gambler and Kurrie soils have bedrock at depths of less than 60 inches. Hollandlake soils have a udic moisture regime. Larand soils have sandy-skeletal 2C horizons. Leadville soils have hue of 5YR in a major part of the solum and C horizon. Tolvar soils have a large percentage of medium, coarse, and very coarse angular sand in the fine earth, and have "hard setting" properties when dry.
GEOGRAPHIC SETTING: The Granile soils are on mountain slopes and hills. Slope ranges from 2 to 60 percent. The soils formed in slope alluvium and colluvium derived principally from gneiss, schist, and granitic rocks. Elevation is 8,000 to 10,000 feet. Mean annual precipitation is 15 to 24 inches with a peak period of precipitation in the spring and summer. Mean annual temperature is 35 to 41 degrees F, and mean summer temperature is about 50 degrees F. The frost free period is 20 to 70 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Leadville and Troutville soils. Leadville soils have hue of 5YR or redder. Troutville soils have argillic horizons consisting of lamellae.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; moderate permeability.
USE AND VEGETATION: Used as native pastureland, for forestry, and for recreation. Native vegetation is mainly Douglas-fir, lodgepole pine, and a moderate understory of grasses and shrubs.
DISTRIBUTION AND EXTENT: Mountain areas of central and southeastern Colorado and south central Wyoming. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Chaffee County, Colorado, 1974; Chaffee-Lake soil survey area.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: from 1 to 10 inches (E horizon)
Glossic horizon: from 10 to 19 inches (E/B horizon)
Argillic horizon: from 10 to 42 inches (E/B, Bt, and BCt horizons)
Particle-size control section: The zone from 19 to 39 inches (Bt and part of the BCt horizon)
Keys to Soil Taxonomy: Series classified according to Eighth Edition, 1998.
ADDITIONAL DATA: