LOCATION DINSWAMP IDEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, frigid Histic Humaquepts
TYPICAL PEDON: Dinswamp mucky peat, 0 to 2 percent slopes on a lake terrace at an elevation of 5,923 feet. Soil was wet throughout when described in August of 1970. (Colors are for moist soil unless otherwise noted.)
Oe1--0 to 2 inches; black (2.5Y 2/1) mucky peat, dark gray (10YR 4/1) dry; about 50 percent fibers, about 25 percent fibers after rubbing; many very fine, fine, medium and coarse roots; strongly effervescent; strongly alkaline (pH 8.6); clear smooth boundary.
Oe2--2 to 10 inches; black (2.5Y 2/1) mucky peat, dark gray (N 4/0) dry; about 50 percent fibers, about 20 percent fibers after rubbing; many fine and few medium and coarse roots; common fine white shells; strongly effervescent; strongly alkaline (pH 8.6); gradual smooth boundary.
Oe3--10 to 12 inches; dark gray (2.5Y 4/1) mucky peat, gray (2.5Y 5/1) dry; about 40 percent fibers, about 20 percent fibers after rubbing; common fine roots, strongly effervescent; common fine white shells; strongly alkaline (pH 8.6); gradual smooth boundary. (Combined thickness of the Oe horizons is 8 to 15 inches)
2Bg1--12 to 18 inches; light brownish gray (2.5Y 6/2) silty clay loam, pale yellow (2.5Y 8/2) dry; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fibrous roots; many very fine and fine pores; many fine white shells; calcium carbonate disseminated; strongly effervescent; strongly alkaline (pH 8.8); gradual smooth boundary. (6 to 15 inches thick)
2Bg2--18 to 40 inches; light olive gray (5Y 6/2) silty clay loam, pale yellow (5Y 8/2) dry; weak medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few fibrous roots; common fine, medium, and coarse pores; calcium carbonate disseminated; violently effervescent; strongly alkaline (pH 8.6); gradual smooth boundary. (10 to 22 inches thick)
2Cg3--40 to 60 inches; light olive gray (5Y 6/2) fine sandy loam, pale yellow (5Y 8/2) dry; massive; soft, very friable, nonsticky and nonplastic; few fibrous roots; common fine, medium, and coarse pores; calcium carbonate disseminated; violently effervescent; strongly alkaline (pH 8.6).
TYPE LOCATION: Bear Lake County, Idaho, about 2 miles west of Lifton pump station, 1,320 feet south and 4,620 feet east of the northwest corner of section 7, T. 15 S., R. 44 E. Latitude 42 degrees 8 minutes 12.3 seconds north; Longitude 111 degrees 20 minutes 57.4 seconds west.
RANGE IN CHARACTERISTICS:
Organic layers - 8 to 15 inches thick
Depth to water table - 18 inches above(ponded)to 12 inches below the surface.
Average annual soil temperature - 42 to 47 degrees F. Frigid soil temperature regime
Particle-size control section
Less than 15 percent fine sand or coarser
Oe horizons
Hue - 2.5Y, 10YR, or neutral
Value - 2 through 4 dry
Calcium Carbonate Equivalent - 5 to 15 percent
Reaction - moderately or strongly alkaline
2Bg horizons
Hue - 2.5Y or 5Y
Value - 7 or 8 dry, 5 or 6 moist
Chroma - 1 or 2 dry or moist
Clay content - 20 to 34 percent
Texture - silty clay loam, silt loam
Calcium Carbonate Equivalent - 30 to 40 percent
Reaction - moderately or strongly alkaline
2Cg horizon
Hue - 2.5Y or 5Y
Value - 7 or 8 dry, 5 or 6 moist
Chroma - 1 or 2 dry or moist
Clay content - 18 to 30 percent
Texture - fine sandy loam, silt loam, silty clay loam
Calcium Carbonate Equivalent - 30 to 40 percent
Reaction - moderately or strongly alkaline
COMPETING SERIES: This is the Bickett series. Bickett soils have 5 to 35 percent rock fragments in the 3Cg horizon and has k horizons.
GEOGRAPHIC SETTING:
Landform: Lakebeds and lake terraces
Elevation: 5,900 to 6,000 feet
Slope: 0 to 2 percent
Parent material: organic material over lake 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, Bloomington (T), Chesbrook, Dingle (T), and Picabo series. Bear Lake soils lack an accumulation of organic material on floodplains and low stream terraces. Bloomington soils have a thick dark mineral soil surface on lake plains. Chesbrook soils are carbonatic and lack an accumulation of organic soil material. Dingle soils have a thick layer of organic material in the upper part on the same landscape position. Picabo soils are carbonatic and have less than 18 percent clay in the control section on low alluvial fans.
DRAINAGE AND PERMEABILITY: Very poorly drained; runoff is very slow or ponded; permeability is moderately slow. These soils are continually ponded from October to July. In August and September the water table is manually dropped to allow some haying on field edges.
USE AND VEGETATION: Used mainly for wildlife habitat. Some areas are used for hayland during nonflooded periods. Vegetation is Baltic rush and sedges.
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.
REMARKS: Diagnostic horizons and features recognized in this pedon:
Histic epipedon - the zone from 0 to 12 inches (Oe horizons)
Aquic moisture regime