LOCATION CUPINE IDEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Typic Haploxerolls
TYPICAL PEDON: Cupine channery sandy loam, rangeland-on a 20 percent slope on a northerly aspect at an elevation of 7,000 feet. (Colors are for dry soil unless otherwise noted. When described July 1985, the profile was slightly moist throughout.)
A--0 to 3 inches; brown (10YR 4/3) channery sandy loam, dark brown (10YR 3/3) moist; moderate very fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine, fine, and coarse and common medium roots; many very fine and fine irregular pores; 15 percent channers; neutral (pH 7.1); abrupt smooth boundary. (2 to 10 inches thick)
Bw1--3 to 10 inches; brown (7.5YR 4/4) channery sandy loam, dark reddish brown (5YR 3/3) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; common very fine, fine, and medium roots; many very fine irregular pores; 15 percent channers; neutral (pH 6.9); clear smooth boundary. (4 to 9 inches thick)
Bw2--10 to 17 inches; brown (7.5YR 4/4) channery sandy loam, brown (7.5YR 4/4) moist; weak coarse platy structure parting to moderate medium angular blocky; slightly hard, firm, nonsticky and nonplastic; common very fine irregular pores; 20 percent channers; neutral (pH 6.8); clear wavy boundary. (5 to 7 inches thick)
2BC--17 to 23 inches; brown (7.5YR 5/4) extremely channery sandy loam, brown (7.5YR 4/4) moist; moderate medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; few very fine and fine roots; common very fine irregular pores; 65 percent channers and 25 percent flagstones; neutral (pH 6.7); abrupt smooth boundary. (2 to 8 inches thick)
R--23 inches; sandstone.
TYPE LOCATION: Bear Lake County, Idaho; about 1.5 miles east of Bear Lake, about 50 feet north and 825 feet east of the southwest corner of sec. 17, T. 16S., R. 45E.; LATITUDE: 42 degrees, 6 minutes, 41 seconds N., LONGITUDE 111 degrees, 13 minutes, 29 seconds W.
RANGE IN CHARACTERISTICS:
Soil moisture control section - usually moist, dry for 45 consecutive days or more in the four months following the summer solstice. Xeric soil moisture regime.
Average annual soil temperature: 43 to 46 degrees F. Frigid soil temperature regime.
Mollic epipedon thickness: 10 to 15 inches
Depth to bedrock: 20 to 35 inches
Particle-size control section
Clay content: 8 to 17 percent
Rock fragments: 35 to 90 percent
A horizon
Hue: 7.5YR or 10YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 3 or 4 dry
Clay content: 8 to 15 percent
Rock fragments: 10 to 25 percent channers
Reaction: neutral or slightly alkaline
Bw horizons
Hue: 5YR or 7.5YR
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 2 through 4 moist
Texture: channery sandy loam, very channery sandy loam or very channery loam
Clay content: 10 to 20 percent
Rock fragment: 15 to 50 percent channers
Reaction: neutral or slightly alkaline
2BC horizon
Value: 4 or 5 dry
Chroma: 4 or 6 dry and moist
Clay: 7 to 12 percent
Rock fragment: 65 to 90 percent-55 to 65 percent channers, 10 to 25 percent flagstones
Reaction: neutral or slightly alkaline
COMPETING SERIES: These are the Bergquist (T), Bigarm, Bradshaw, Brunzell, Fuego, Mud Springs, Potamus, St Marys and Warshod series. The Bergquist soils are 40 to 60 inches to a lithic contact. Bigarm, Bradshaw, and Brumzell soils are very deep. Fuego soils contain 5 to 30 percent pumiceous ash. Mudsprings soils are 20 to 40 inches to a lithic contact. Potamus soils have 28 to 35 percent clay in the particle-size control section. The St Marys soils are 40 to 60 inches or more over bedrock. The Warshod soils are soils are 40 to 60 inches to paralithic contact.
GEOGRAPHIC SETTING:
Landform: ridgetops and mountainsides
Elevation: 5,950 to 7,700 feet
Slope: 4 to 70 percent
Parent material: residuum from sandstone
Climate: long, cold winters, moist springs, dry, warm summers
Average annual precipitation: 12 to 20 inches
Average annual temperature: 39 to 45 degrees F
Frost-free period: 70 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Beehunt (T), Cooley (T), and Jebo series. The Beehunt series has a pachic mollic epipedon and are on north-facing slopes with an average summer soil temperature lower than 59 degrees F. The Cooley series has a calcic horizon, are on south-facing slopes and are deeper than 60 inches to bedrock. The Jebo series has a calcic horizon and are on ridgetops.
DRAINAGE AND PERMEABILITY: Well drained, moderate permeability in the upper part of the profile and moderately rapid in the lower part, slow to very rapid runoff.
USE AND VEGETATION: Use mainly for rangeland and wildlife habitat. The dominant vegetation is alkali sagebrush, rabbit brush, mountain big sagebrush, buckwheat, and bluebunch wheatgrass.
DISTRIBUTION AND EXTENT: Southeast Idaho. These soils are not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Bear Lake County, Idaho, 2008.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: the zone from the soil surface to 10 inches (A, Bw1 horizons)
Cambic horizon: the zone from 10 to 17 inches (Bw2 horizon)
Lithic contact: the boundary at 23 inches (R horizon)
Particle-size control section: the zone from 10 to 23 inches (Bw2, BC horizons)