LOCATION DRANEY IDEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, frigid, shallow Typic Calcixerolls
TYPICAL PEDON: Draney gravelly loam, rangeland; on a 16 percent slope at an elevation of 6,180 feet. (Colors are for dry soil unless otherwise stated.)
A--0 to 6 inches; dark grayish brown (10YR 4/2) gravelly loam, very dark grayish brown (10YR 3/2) moist; moderate fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine and few medium roots; 15 percent gravel; strongly effervescent; slightly alkaline (pH 7.6); clear smooth boundary. (4 to 6 inches thick)
Bk1--6 to 12 inches; pale brown (10YR 6/3) gravelly loam, brown (10YR 5/3) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and fine and few medium roots; lime is disseminated and as thin coats on all fragments; 15 percent gravel and 5 percent paragravel; strongly effervescent; slightly alkaline (pH 7.8); clear wavy boundary.
Bk2--12 to 18 inches; very pale brown (10YR 7/3) paragravelly loam, pale brown (10YR 6/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; few very fine and fine roots; lime is disseminated and as thin coats on all fragments; 10 percent gravel and 20 percent paragravel; strongly effervescent; moderately alkaline (pH 8.0); abrupt wavy boundary. (Combined thickness is 8 to 15 inches)
2Cr--18 to 60 inches; light gray (2.5Y 7/2) weakly consolidated calcareous tuffaceous siltstone.
TYPE LOCATION: Bear Lake County, Idaho; about 3 miles northwest of Bennington, Idaho; about 1,780 feet east and 960 feet north of the southwest corner of section 35, T. 12 S., R. 43 E. (42 degrees 25 minutes 5.7 seconds North Latitude and 111 degrees 23 minutes 57.9 seconds West Longitude.)
RANGE IN CHARACTERISTICS:
Soil moisture control section usually moist, dry in all parts for 45 consecutive days or more in the four months following the summer solstice. Xeric moisture regime.
Thickness of mollic epipedon 7 inches mixed
Depth to paralithic contact 10 to 20 inches
Average annual soil temperature 42 to 46 degrees F. Frigid soil temperature regime.
Particle-size control section
Clay content 16 to 22 percent
Rock fragments 10 to 20 percent
Para rock fragments 5 to 20 percent
A horizon
Value 3 or 4 dry, 2 or 3 moist
Chroma 2 or 3 dry or moist
Texture gravelly loam
Clay content 15 to 18 percent
Rock fragments 15 to 25 percent gravel
Calcium carbonate equivalent 10 to 20 percent
Reaction slightly alkaline (pH 7.4 to 7.8)
Bk horizons
Value 6 or 7 dry, 5 or 6 moist
Chroma 2 or 3 dry or moist
Texture gravelly loam, paragravelly loam
Clay content 16 to 22 percent
Rock fragments 10 to 20 percent gravel
Para rock fragments 5 to 20 percent
Calcium carbonate equivalent 25 to 35 percent
Reaction slightly to moderately alkaline (pH 7.4 to 8.4)
COMPETING SERIES: There are no competing series
GEOGRAPHIC SETTING:
Landform: convex shoulder positions on hills of the Salt Lake Formation
Elevation: 5,980 to 6,400 feet
Slope: 15 to 30 percent
Parent Material: thin mantle of alluvium over weakly consolidated calcareous tuffaceous siltstone or sandstone, or weakly consolidated calcareous ash
Climate: long, cool winters; dry, warm summers
Average annual precipitation: 12 to 16 inches
Average annual temperature: 41 to 44 degrees F.
Frost-free season: 70 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Brushtop (T), Redpine (T), and Whitetop (T), soils. Brushtop soils are deep to weakly consolidated ash, have argillic horizons and occur on north facing backslopes and footslopes. Redpine soils are moderately deep to weakly consolidated ash, have argillic horizons and occur on backslopes and shoulder slopes. Whitetop soils are shallow, formed from weakly consolidated ash, lack significant carbonates throughout the control section and occur on shoulder slopes and upper backslopes.
DRAINAGE AND PERMEABILITY: Well drained; moderately rapid permeability.
USE AND VEGETATION: These soils are used mainly for wildlife habitat and rangeland. The dominant native vegetation is low sagebrush, bluebunch wheatgrass, Indian ricegrass, bluegrass, needleandthread and prairie junegrass.
DISTRIBUTION AND EXTENT: Southeastern Idaho. The series is not extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Bear Lake County, Idaho, 2008. The name is coined.
REMARKS: Depths to diagnostic horizons and features start from the mineral soil surface. Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: the zone from 0 to 7 inches mixed (A horizon and part of Bk1 horizon)
Calcic horizon: the zone from 6 to 18 inches (Bk1 and Bk2 horizons)
Paralithic contact: 18 inches (2Cr horizon)
Particle-size control section: the zone from 10 to 18 inches (part of the Bk1 and the Bk2 horizon)