LOCATION BLOOMINGTON IDEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, frigid Cumulic Endoaquolls
TYPICAL PEDON: Bloomington mucky silt loam, 0 to 2 percent slopes on a lake plain at an elevation of 5,960 feet. (Colors are for dry soil unless otherwise noted).
Oa--0 to 3 inches; very dark brown (10YR 2/2) rubbed and pressed muck (sapric material); about 30 percent fiber, about 15 percent rubbed; nonsticky and nonplastic; neutral (pH 7.3); abrupt smooth boundary. (3 to 6 inches thick)
A1--3 to 10 inches; black (10YR 2/1) mucky silt loam, very dark gray (10YR 3/1) dry; moderate fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots; many fine irregular pores; slightly effervescent; neutral (pH 7.3); clear smooth boundary.
A2--10 to 21 inches; black (10YR 2/1) silty clay loam, very dark gray (10YR 3/1) dry; weak medium subangular blocky structure parting to moderate fine granular; hard, firm, moderately sticky and moderately plastic; many very fine and fine roots; many fine irregular pores; disseminated lime; common fine white snail shells; strongly effervescent; slightly alkaline (pH 7.4); clear smooth boundary. (combined thickness of the A horizon is 15 to 18 inches)
Bg--21 to 32 inches; very dark gray (10YR 3/1) silty clay loam, dark gray (10YR 4/1) dry; weak medium and coarse subangular blocky structure; hard, firm, moderately sticky and moderately plastic; many very fine and fine roots; common very fine and fine irregular pores; few fine distinct dark yellowish brown (10YR 4/4) redox concentrations; disseminated lime; common fine white snail shells; strongly effervescent; slightly alkaline (pH 7.6); clear wavy boundary. (5 to 11 inches thick)
Cg1--32 to 42 inches; light brownish gray (2.5Y 6/2) silty clay loam; light gray (2.5Y 7/2) dry; massive; very hard, firm, moderately sticky and moderately plastic; common very fine and fine roots; common fine and very fine tubular pores; few fine distinct dark yellowish brown (10YR 4/4) redox concentrations; disseminated lime; few fine white snail shells; strongly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary.
Cg2--42 to 48 inches; greenish gray (5GY 6/1) silty clay loam; light greenish gray (5GY 7/1) dry; massive; very hard; firm, moderately sticky and moderately plastic; few very fine roots; common fine and very fine tubular pores; disseminated lime; few fine white snail shells; strongly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary.
Cg3--48 to 60 inches; greenish gray (5G 6/1) silt loam; light greenish gray (5GY 7/1) dry; massive; very hard; firm, moderately sticky and moderately plastic; few very fine roots; common fine and very fine tubular pores; disseminated lime; few fine white snail shells; strongly effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Bear Lake County, Idaho; about 1 mile north of the Lifton pump station; about 800 feet east and 700 feet north of the southwest corner of section 35, T. 14 S., R. 44 E. (Latitude 42 degrees, 09 minutes, and 16 seconds N., Longitude 111 degrees, 16 minutes, and 12 seconds W.)
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness - 20 to 29 inches
Depth to redox features - immediately below the A horizon
Depth to seasonal high water table - +12 to 10 inches October through July
Average annual soil temperature - 42 to 46 degrees F. Frigid soil temperature regime.
Particle-size control section
Clay content - 18 to 34 percent
Organic matter content - 5 to 10 percent
Calcium carbonate equivalent - 10 to 30 percent
A horizons
Chroma - 1 or 2 dry or moist
Texture - silt loam, silty clay loam
Clay content - 18 to 28 percent
Calcium carbonate equivalent - 0 to 15 percent
Reaction - neutral or slightly alkaline
Bg horizon
Hue - 10YR or 2.5Y
Value - 2 or 3 moist, 3 or 4 dry
Chroma - 1 or 2 dry or moist
Texture - silty clay loam, silt loam
Clay content - 20 to 34 percent
Calcium carbonate equivalent - 10 to 25 percent
Reaction - slightly or moderately alkaline
Cg horizons
Hue - 2.5Y, 5GY, or 5G
Value - 6 or 7 dry, 4 to 6 moist
Chroma - 1 or 2 dry or moist
Texture - silty clay loam, silt loam
Clay content - 20 to 34 percent
Calcium carbonate equivalent - 15 to 30 percent
Reaction - slightly or moderately alkaline
COMPETING SERIES:
Bigstone- does not have an Oa horizon; has 2Cg horizon at 36 to 80 inches containing 1 to 8 percent rock fragments; receives 24 to 27 inches of precipitation.
Downata- has buried organic layers of sapric material and is saturated in the moisture control section for less than 20 days following the summer solstice.
Halleck- has a component of volcanic ash and loess in the control section; is poorly drained.
Homefield- has Ak and Bk horizons with calcium carbonate equivalent of 1 to 5 percent; has a 2C horizon with 40 to 60 percent clay at 40 to 60 inches.
Inkom- Is saturated in the moisture control section for less than 20 days following the summer solstice; is poorly drained.
Lamoure- is somewhat poorly or poorly drained; is in a 16 to 24 inches precipitation zone.
Opie- has 10 to 30 percent gravel in the 2C horizon; has Ak horizons 16 to 25 inches thick.
Playmoor- has salt accumulations (4 to 16 mmhos/cm) in the upper 20 inches; has Bk horizons.
Rauville- has stratified textures in the 2C horizon of gravelly sandy loam, sandy loam, and fine sandy loam; formed in alluvium.
GEOGRAPHIC SETTING:
Landform: lake plains, lake terraces
Elevation: 5,900 to 6,000 feet
Slope: 0 to 2 percent
Parent material: lacustrine sediments
Climate: long, cool winters; moist springs, and dry, warm summers.
Average annual precipitation: 12 to 16 inches
Average annual temperature: 39 to 45 degrees F.
Frost-free season: 70 to 100 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bear Lake, Dingle (T), Dinswamp (T), and La Roco soils. Bear Lake soils have a thinner dark surface layer and have a calcic horizon on low stream terraces. Dingle soils have a thick accumulation of organic material in the upper part in concave positions on same landscape. Dinswamp soils have an accumulation of organic material 8 to 15 inches thick on same landscape position. La Roco soils occur on higher positions and are carbonatic.
DRAINAGE AND PERMEABILITY: Very poorly drained; runoff is slow or very slow; permeability is moderately slow. These soils have a water table one foot above the surface (ponded) to 10 inches below the surface at some time from October to July. Ponding is frequent or occasional for brief to very long periods.
USE AND VEGETATION: Used for wildlife habitat. Vegetation is Baltic rush, bluejoint reedgrass, and sedges.
DISTRIBUTION AND EXTENT: Southeast Idaho. This soil is of small extent.
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 3 to 32 inches (A1, A2, and Bg horizons)
Aquic moisture regime