LOCATION JACANYON IDEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Argixerolls
TYPICAL PEDON: Jacanyon loam, in rangeland on a 25 percent slope at an elevation of 6,500 feet. (Colors are for dry soil unless otherwise stated.)
A--0 to 2 inches; brown (10YR 4/3) loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine, common medium, and few coarse roots; few fine irregular pores; 5 percent gravel; neutral (pH 6.8); abrupt smooth boundary. (2 to 4 inches thick)
Bt1--2 to 11 inches; brown (10YR 4/3) gravelly loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; common medium and few fine roots; common fine and very fine tubular pores; common distinct clay films on faces of peds; 15 percent gravel; neutral (pH 6.8); clear smooth boundary.
Bt2--11 to 18 inches; dark yellowish brown (10YR 4/4) gravelly clay loam, dark brown (10YR 3/3) moist; moderate medium prismatic structure parting to moderate medium and fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; common fine and very fine tubular pores; common distinct clay films on faces of peds; 15 percent gravel; neutral (pH 7.0); clear smooth boundary.
Bt3--18 to 26 inches; dark yellowish brown (10YR 4/4) gravelly clay loam, dark yellowish brown (10YR 3/4) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky and slightly plastic; few very fine roots; common fine tubular pores; common distinct clay films on faces of peds; 15 percent gravel and 5 channers; neutral (pH 7.0); clear smooth boundary. (combined thickness of Bt horizons is 18 to 27 inches)
BC1--26 to 30 inches; brown (10YR 4/3) channery clay loam, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, moderately sticky and slightly plastic; few very fine roots; few fine irregular pores; 20 percent channers; neutral (pH 7.0); clear smooth boundary.
BC2--30 to 35 inches; reddish yellow (7.5YR 6/6) very channery clay loam, yellowish brown (10YR 5/6) moist; massive; slightly hard, firm, slightly sticky and slightly plastic; 35 percent channers; neutral (pH 7.0); abrupt smooth boundary. (combined thickness of BC horizons is 6 to 9 inches)
R--35 inches; sandstone.
TYPE LOCATION: Bear Lake County, Idaho; about 1800 feet north and 150 feet east of the southwest corner of section 33, T. 15S., R. 43E. (Lat. 42 degrees, 4 minutes, 23 seconds N., Long. 111 degrees, 26 minutes, 32 seconds W.)
RANGE IN CHARACTERISTICS:
Average annual soil temperature - 42 to 46 degrees F. Frigid soil temperature regime.
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.
Mollic epipedon thickness - 14 to 18 inches; includes part of Bt horizon
Depth to bedrock - 20 to 40 inches
Reaction - neutral throughout
Particle-size control section
Clay content - 22 to 33 percent
Rock fragments - 15 to 30 percent
A horizon
Hue: 10YR or 7.5YR
Value: 3 or 4 dry; 2 or 3 moist
Chroma: 2 or 3 dry or moist
Clay content: 12 to 20 percent
Rock fragments: 0 to 10 percent gravel
Bt horizons
Hue: 10YR or 7.5YR
Value: 3 through 5 dry; 3 or 4 moist
Chroma: 2 through 4 dry or moist
Texture: gravelly loam or gravelly clay loam
Clay content: 22 to 33 percent
Rock fragments: 15 to 30 percent gravel and 0 to 5 percent channners
BC horizons
Hue: 10YR or 7.5YR
Value: 4 through 6 dry; 4 or 5 moist
Chroma: 3 through 6 dry or moist
Clay content: 20 to 33 percent
Texture: channery clay loam and very channery clay loam
Rock fragments: 20 to 35 percent channers
COMPETING SERIES:
Alexander (T) - formed in eolian material.
Ayoub - formed in colluvium and residuum derived from andesite.
Cloud Rim - are very deep.
Cloudless - are very deep.
Dry Canyon (T) - are moderately deep to paralithic contact.
Isbell - are very deep.
Kanlee - are moderately deep to paralithic contact.
Maple Mountain - are very deep.
Paynecreek - are very deep.
Ticino - are moderately deep to paralithic contact.
GEOGRAPHIC SETTING:
Landform: back slopes and shoulders of foothills, hills, and mountain slopes
Elevation: 5,900 to 7,300 feet
Slope: 10 to 50 percent
Parent material: colluvium over residuum from sedimentary rock
Climate: long, cool winters; moist springs, and dry, warm summers.
Average annual precipitation: 15 to 24 inches
Average annual temperature: 39 to 44 degrees F.
Frost-free season: 70 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Grink, Hutchley, and Shalcleav soils. Grink soils are shallow to bedrock and are on summits and shoulders of hills. Hutchley soils are shallow to bedrock on south facing slopes on hills. Shalcleav soils are shallow to sandstone on the same landscape position.
DRAINAGE AND PERMEABILITY: Well drained; runoff is rapid to very rapid; permeability is moderately slow.
USE AND VEGETATION: Used for wildlife habitat. Vegetation is mountain big sagebrush, mountain snowberry, antelope bitterbrush, oregon grape, Idaho fescue, prairie junegrass, bluebunch wheatgrass.
DISTRIBUTION AND EXTENT: Southeast Idaho. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Bear Lake County, Idaho, 2008. The name is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 0 to 11 inches. (A and Bt1 horizons)
Argillic horizon - the zone from 2 to 26 inches. (Bt1, Bt2, and Bt3 horizons)
Lithic contact - sandstone at 35 inches (R horizon)
Particle-size control section - the zone from 2 to 22 inches (Bt1, Bt2, and part of the Bt3 horizon)
Xeric moisture regime