LOCATION LYMANING COEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Ustic Haplocryolls
TYPICAL PEDON: Lymaning clay loam, 8 percent slope in grassland, at an elevation of 8,300 feet. (Colors are for dry soil unless otherwise noted.) Described on August 25, 1986.
A--0 to 2 inches; brown (10YR 4/3) clay loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, slightly sticky, slightly plastic, many very fine and fine roots; many very fine and fine pores; 10 percent gravel; moderately acid (pH 6.0); clear smooth boundary.
BA--2 to 5 inches; brown (10YR 4/3) sandy clay loam, dark brown (10YR 3/3) moist; weak medium subangular blocky structure parting to moderate fine subangular blocky; slightly hard, friable, sticky, plastic; few very fine and fine roots; few very fine and fine pores; 5 percent gravel; neutral (pH 7.0); clear smooth boundary. (combined thickness of the A and BA horizons is5 to 10 inches)
Bw--5 to 12 inches; brown (10YR 5/3) gravelly sandy clay loam, dark yellowish brown (10YR 4/4) moist; moderate medium prismatic structure parting to moderate coarse subangular blocky; hard, firm, sticky, plastic; few very fine and fine roots; common very fine and fine pores; 20 percent gravel; slightly alkaline (pH 7.8); gradual wavy boundary. (5 to 8 inches thick)
Bk1--12 to 18 inches; pale brown (10YR 6/3) sandy clay loam, brown (10YR 4/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; few very fine and fine roots; few very fine and fine pores; violently effervescent; many fine calcium carbonate masses; 4 percent calcium carbonate equivalent; 10 percent gravel; moderately alkaline (pH 8.3); gradual wavy boundary.
Bk2--18 to 26 inches; pale brown (10YR 6/3) gravelly clay loam, brown (10YR 4/3) moist; weak coarse subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; few very fine and fine roots; common very fine and fine pores; violently effervescent; many fine calcium carbonate masses; 7 percent calcium carbonate equivalent; 20 percent gravel; strongly alkaline (pH 8.5); clear wavy boundary. (combined thickness of the Bk horizons is10 to 20 inches)
Cr--26 to 60 inches; moderately cemented shale.
TYPE LOCATION: Teller County, Colorado; about 2 miles south of Florissant, in Florissant National Monument; about 1500 feet east and 2000 feet north of the southwest corner of sec. 13, T. 13 S., R. 71 W.; Lake George USGS quad; 4307868m N., 475451m E., Zone 13, lat. 38 degrees 55 minutes 9.8 seconds W., long. 105 degrees 16 minutes 59.5 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is usually dry in some part in early summer, moist in some or all parts in late July and August, and intermittently dry in fall; ustic regime.
Thickness of mollic epipedon: 7 to 10 inches
Depth to cambic horizon: 7 to 10 inches
Depth to secondary carbonate: 10 to 18 inches
Depth to paralithic contact: 20 to 40 inches
Mean annual soil temperature: 37 to 42 degrees F.
Mean summer soil temperature: 51 to 58 degrees F.
Particle-size control section (weighted average):
Clay content: 27 to 35 percent
Gravel content: 15 to 30 percent
A, BA horizons:
Value: 3 or 4, 2 or 3 moist
Chroma: 2 or 3, 2 or 3 moist
Texture: sandy clay loam or clay loam
Clay content: 27 to 35 percent
Gravel content: 0 to 14 percent
Reaction: moderately acid through neutral
Bw horizon:
Hue: 10YR or 2.5Y
Value: 4 through 6, 4 or 5 moist
Chroma: 2 through 4, 2 through 4 moist
Texture: gravelly clay loam or gravelly sandy clay loam
Clay content: 30 to 35 percent
Gravel content: 15 to 30 percent
Reaction: neutral or slightly alkaline
Bk horizons:
Hue: 10YR or 2.5Y
Value: 4 through 6, 4 or 5 moist
Chroma: 2 through 4, 2 through 4 moist
Texture: clay loam, sandy clay loam, gravelly clay loam, or gravelly sandy clay loam
Clay content: 27 to 35 percent
Gravel content: 5 to 30 percent
Calcium Carbonate Equivalent: 4 to 15 percent
Reaction: slightly alkaline through strongly alkaline
COMPETING SERIES: These are the
Auzqui,
Bynum,
Emerald,
Redcloud,
Tamp,
Tampico,
Teton,
Thayne,
Tilton,
Uhl, and
Wrenman series.
Auzqui, Emerald, Redcloud, Tamp, Tampico, Thayne, Tilton, and Uhl soils are deeper than 40 inches to a lithic or paralithic contact.
Bynum soils have less than 15 percent gravel in the particle-size control section.
GEOGRAPHIC SETTING:
Parent material: slope alluvium from tuff and shale, typically sedimentary deposits of Oligocene age
Landform: pediments
Slopes: 6 to 20 percent
Elevation: 8,000 to 8,800 feet
Mean annual air temperature: 37 to 40 degrees F.
Mean annual precipitation: 14 to 16 inches
Precipitation pattern: Monthly precipitation is lowest in winter and greatest in July and August.
Frost-free period: 50 to 80 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fourmile and Florissant series. The Fourmile soils are very deep. The Florissant soils are shallow to bedrock.
DRAINAGE AND PERMEABILITY: well drained, moderately slow permeability
USE AND VEGETATION: These soils are used mainly for livestock grazing and recreation. Potential native vegetation is mainly Arizona fescue, mountain muhly, Parry's oatgrass, blue grama, prairie junegrass, sleepygrass, slimstem muhly, and western wheatgrass.
DISTRIBUTION AND EXTENT: Central Colorado; LRR E, MLRA 48A; small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Teller County, Colorado, Teller-Park soil survey area; 2010. The name is coined.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Series control section: The zone from 0 to 36 inches.
Particle-size control section: The zone from 10 to 26 inches. (Bw, Bk1, Bk2 horizons)
Mollic epipedon: The zone from 0 to 5 inches. (A, BA horizons)
Cambic horizon: The zone from 5 to 12 inches. (Bw horizon); Thin section study did not indicate any illuvial clay in this horizon.
Secondary calcium carbonate accumulation: The zone from 12 to 26 inches. (Bk1, Bk2 horizons)
Paralithic contact: The contact with shale at 26 inches. (Cr layer)
The 11/2009 revision changes the classification from Ustollic Haplocryalfs to Ustic Haplocryolls. Thin section analysis did not identify any illuvial clay in the Bw horizon. This horizon was originally described with "common faint clay films on face of peds".
Taxonomic Version: Eleventh Edition Keys to Soil Taxonomy, 2010.
ADDITIONAL DATA: This pedon was sampled for the National Soil Survey laboratory, soil survey sample number 88CO-119-004.