LOCATION GLENTIVAR COEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Calcic Argicryolls
TYPICAL PEDON: Glentivar sandy loam, on a north facing, 3 percent slope in grassland at an elevation of 2789 meters (9,150 feet). (Colors are for dry soil unless otherwise noted.) Described on July 26, 1994.
A--0 to 15 cm (0 to 6 inches); brown (10YR 4/3) sandy loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, slightly sticky, slightly plastic; 5 percent gravel; neutral (pH 6.6); clear smooth boundary. (10 to 25 cm thick)
Bt--15 to 30 cm (6 to 12 inches); dark brown (10YR 3/3) clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium prismatic structure; slightly hard, very friable, slightly sticky, slightly plastic; common distinct clay films on faces of peds; 5 percent gravel; neutral (pH 6.8); clear smooth boundary. (15 to 25 cm thick)
Bk1--30 to 53 cm (12 to 21 inches); pale yellow (2.5Y 7/3) gravelly loam, light yellowish brown (2.5Y 6/4) moist; weak coarse subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; common fine carbonate masses in the matrix; 30 percent gravel; strongly effervescent; 7 percent calcium carbonate equivalent; moderately alkaline (pH 8.0); abrupt smooth boundary.
Bk2--53 to 61 cm (21 to 24 inches); pale yellow (2.5Y 8/3) sandy loam, pale yellow (2.5Y 7/4) moist; massive; extremely hard, firm, nonsticky, nonplastic; many fine carbonate masses in the matrix; 5 percent gravel; slightly effervescent; 6 percent calcium carbonate equivalent; slightly alkaline (pH 7.6); abrupt smooth boundary.
Bk3--61 to 91 cm (24 to 36 inches); pale yellow (2.5Y 7/4) sandy loam, light yellowish brown (2.5Y 6/4) moist; massive; extremely hard, firm, nonsticky, nonplastic; many fine carbonate masses in the matrix; 5 percent gravel; slightly effervescent; 6 percent calcium carbonate equivalent; slightly alkaline (pH 7.6); abrupt smooth boundary.
Bk4--91 to 102 cm (36 to 40 inches); pale yellow (2.5Y 7/4) sandy loam, light yellowish brown (2.5Y 6/4) moist; massive; extremely hard, firm, nonsticky, nonplastic; many fine and medium carbonate masses in the matrix; 5 percent gravel; slightly effervescent; 6 percent calcium carbonate equivalent; slightly alkaline (pH 7.6); abrupt smooth boundary. (combined thickness of the Bk horizons: 51 to 150 cm thick)
Cr--102 to 127 cm (40 to 50 inches); moderately cemented sandstone.
TYPE LOCATION: Park County, Colorado; about 19 kilometers (12 miles) northeast of Hartsel; located about 400 feet north and 700 feet west of the southeast corner of sec. 6, T. 11 S., R. 74 W.; Sulphur Mountain USGS quad; lat. 39 degrees 08 minutes 25 seconds N. and long. 105 degrees 41 minutes 19 seconds W. NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is usually dry in late spring and early summer, moist in some part in late July and August, and intermittently dry in fall; ustic regime bordering on aridic.
Mean annual soil temperature: 2.8 to 5.0 degrees C (37 to 41 degrees F)
Mean summer soil temperature: 10.6 to 14.4 degrees C (51 to 58 degrees F)
Depth to paralithic contact: 102 to 127 cm (40 to 50 inches) to limestone, sandstone, or shale
Depth to argillic horizon: 15 to 30 cm (6 to 12 inches)
Depth to secondary calcium carbonate: 30 to 61 cm (12 to 24 inches)
Depth to calcic horizon: 46 to 61 cm (18 to 24 inches)
Thickness of the mollic epipedon: 25 to 36 inches (10 to 14 inches)
Particle-size control section (weighted averages):
Clay content: 25 to 32 percent
Rock fragment content: 5 to 10 percent
A horizon
Value: 3 or 4 dry; 3 moist
Chroma: 3 dry; 2 moist
Clay content: 12 to 18 percent
Gravel content: 5 to 10 percent, indurated
Organic matter content: 2.0 to 4.0 percent
Bt horizon
Value: 3 or 4 dry; 3 or 4 moist
Chroma: 3 dry; 2 or 3 moist
Texture: clay loam, sandy clay loam
Clay content: 25 to 32 percent
Gravel content: 5 to 10 percent, indurated
Organic matter content: 2.0 to 4.0 percent
Bk horizon, upper part (includes a Bky in some pedons)
Hue: 10YR, 2.5Y
Value: 5 to 8 dry; 4 to 7 moist
Chroma: 3 or 4 dry; 3 to 4 moist
Clay content: 18 to 27 percent
Gravel content: 15 to 35 percent, indurated
Calcium carbonate equivalent: 5 to 10 percent
Gypsum content: 0 to 2 percent
Reaction: slightly alkaline or moderately alkaline
Bk horizon, lower part (includes a Bky in some pedons)
Hue: 10YR, 2.5Y
Value: 5 to 8 dry; 4 to 7 moist
Chroma: 3 or 4 dry; 3 to 4 moist
Clay content: 12 to 18 percent
Gravel content: 5 to 10 percent, indurated
Calcium carbonate equivalent: 5 to 10 percent
Gypsum content: 0 to 2 percent
Reaction: slightly alkaline or moderately alkaline
COMPETING SERIES: These are the
Accola,
Elispring,
Madigan,
Michelson,
Monida,
Morset,
Northorn,
Oro Fino, and
Philipsburg series.
Accola, Michelson, Monida, Morset, Northorn, Oro Fino, and Philipsburg soils are very deep.
Elispring and Madigan soils are moderately deep.
GEOGRAPHIC SETTING:
Parent material: slope alluvium derived from limestone, sandstone, and shale
Landform: hills, pediments
Slopes: 3 to 30 percent
Elevation: 2621 to 2926 meters (8,600 to 9,600 feet)
Mean annual temperature: 1.7 to 3.9 degrees C (35 to 39 degrees F)
Mean annual precipitation: 254 to 356 cm (10 to 14 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: This is the Gebson series. The Gebson soils are very deep. The Gebson soils are on pediments.
DRAINAGE AND PERMEABILITY: Well drained, moderately slow permeability
USE AND VEGETATION: These soils are used for livestock grazing and wildlife habitat. Native vegetation consists mainly of Arizona fescue, western wheatgrass, prairie Junegrass, blue grama, and bottlebrush squirreltail.
DISTRIBUTION AND EXTENT: Central Colorado; LRR E, MLRA 48B; moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Park County, Colorado, 2010; Teller-Park soil survey area, Colorado. The name is taken from an abandoned town site in Park County.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Series control section: The zone from 0 to 127 cm.
Particle-size control section: The zone from 15 to 30 cm. (Bt horizon)
Mollic epipedon: The zone from 0 to 30 cm. (A, Bt horizons)
Calcic horizon: The zone from 53 to 102 cm. (Bk2, Bk3, Bk4 horizons)
Argillic horizon: The zone from 15 to 30 cm. (Bt horizon)
Paralithic contact: The contact with sandstone at 102 cm. (Cr layer)
The assignment of the cation-exchange activity class is inferred from lab data from similar soils in the surrounding area.
Taxonomic Version: Classified according to Keys to Soil Taxonomy, 11th Edition, 2010.