LOCATION BUCKLON COEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, shallow Typic Haplocryolls
TYPICAL PEDON: Bucklon loam, in rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 13 inches; very dark grayish brown (10YR 3/2) loam, very dark brown (10YR 2/2) moist; weak fine subangular blocky structure parting to moderate fine granular; soft, very friable; 5 percent black parachanners (shale chips) in the lower part; neutral (pH 6.8), gradual smooth boundary. (6 to 15 inches thick)
Bw--13 to 18 inches; grayish brown (10YR 5/2) clay loam, dark grayish brown (10YR 4/2) moist; weak fine subangular blocky structure parting to moderate medium granular; hard, very friable; 10 percent dark gray parachanners (shale chips); neutral (pH 6.8); gradual smooth boundary. (0 to 14 inches thick)
Cr--18 to 22 inches; dark gray noncalcareous shale.
TYPE LOCATION: Gunnison County, Colorado; about 18 miles northeast of Gunnison, Colorado; along trail near the center of Sec. 30, T. 14 S., R. 83 W.; Matchless Mountain USGS quad.; Lat. 38 degrees, 48 minutes, 29 seconds north, and Long. 106 degrees, 48 minutes, 19 seconds west. NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture regime: udic.
Mean annual soil temperature: 34 to 40 degrees F.
Mean summer soil temperature: 48 to 52 degrees F.
Depth to paralithic contact: 10 to 20 inches to noncalcareous shale.
Thickness of the mollic epipedon: 5 to 15 inches
Particle-size control section:
Clay content: 18 to 35 percent
Rock fragment content: 0 to 30 percent fragments that are mostly small parachanners of shale.
A horizon:
Hue: 2.5Y or 10YR
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 1 to 3, dry and moist
Reaction: slightly acid or neutral
Bw horizon: (a C horizon in some pedons)
Hue: 5Y to 10YR
Texture, fine earth fraction: L or CL
Rock fragment content: 0 to 30 percent, mostly parachanners of shale (shale chips)
Reaction: slightly acid or neutral with little or no increase in pH as depth increases.
Some pedons have C horizons that have low value and chroma, but the color of such horizons is lithochromic and lacks enough organic matter to be part of a mollic epipedon. Some pedons do not have Bw horizons.
COMPETING SERIES: These are no competing series in this subgroup at present. The Devoe, Fusulina, and Fusuvar series may be competing when their classification is updated.
Devoe, Fusulina and Fusuvar soils: have calcium carbonates within the control section. Also, Fusulina and Fusuvar have less than 18 percent clay in the particle size control section.
GEOGRAPHIC SETTING:
Parent material: noncalcareous residuum derived from shale and sandstone.
Landform: hills, ridges, and mountain slopes .
Slopes: 2 to 75 percent
Elevation: 8,000 to 11,000 feet
Mean annual air temperature: 32 to 38 degrees F.
Mean annual precipitation: 20 to 45 inches.
Wettest months: July and August receive slightly more precipitation than other months.
Driest months: May and June receive the least precipitation, however the soils are still moist from snowmelt.
Frost-free period: 40 to 60 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Mayoworth and
Tongue River soils.
Mayoworth and Tounge River soils have argillic horizons and are deeper than 20 inches to bedrock.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate or moderately slow permeability.
USE AND VEGETATION: These soils are used for livestock grazing, woodland, wildlife habitat, and recreation. Native vegetation is mainly scattered spruce, grasses, cinquefoil, lupine, and yarrow.
DISTRIBUTION AND EXTENT: Mountainous areas of central and southwestern Colorado and southern Wyoming. LRR E, MLRA 48A. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Summit County, Colorado, 1974.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from 0 to 13 inches. (A horizon)
Paralithic feature: shale bedrock at 18 inches.
Particle size control section: The zone from 10 to 18 inches. (Part of the A horizon and the Bw horizon)
Keys to Soil Taxonomy: Classified according to the Eighth Edition, 1998
Activity class is presumed based on general trend of other soils in the area.
ADDITIONAL DATA: