LOCATION RAYNAL IDEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, frigid Aquic Cumulic Haploxerolls
TYPICAL PEDON: Raynal silty clay loam, irrigated hayland. When described on September 3, 1991 the soil was dry to 10 inches and moist below. (Colors are for dry soil unless otherwise noted.)
Ap--0 to 10 inches; dark grayish brown (10YR 4/2) silty clay loam, very dark brown (10YR 2/2) moist; strong fine and medium granular structure; hard, friable, moderately sticky and moderately plastic; common very fine and few fine roots; many very fine irregular pores; strongly effervescent; disseminated lime (12 percent calcium carbonate equivalent); slightly alkaline (pH 7.8); abrupt smooth boundary. (8 to 10 inches thick)
BA--10 to 22 inches; brown (10YR 5/3) silty clay loam, very dark grayish brown (10YR 3/2) moist; moderate medium and coarse subangular blocky structure parting to strong fine and medium granular; hard, friable, moderately sticky and moderately plastic; common very fine and medium and few fine roots; common very fine tubular and many very fine irregular pores; strongly effervescent; disseminated lime (12 percent calcium carbonate equivalent); moderately alkaline (pH 8.0); clear smooth boundary. (10 to 15 inches thick)
Bkg1--22 to 29 inches; brown (7.5YR 5/2) silt loam, dark brown (7.5YR 3/2) moist, few fine prominent black (N 2.5/) moist redox depletions; moderate medium and coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and coarse and few fine roots; many very fine tubular pores; strongly effervescent; disseminated lime (8 percent calcium carbonate equivalent) and lime segregated into few fine soft masses and seams; few fine shell fragments; moderately alkaline (pH 8.0); abrupt smooth boundary. (7 to 13 inches thick)
Bkg2--29 to 35 inches; brown (7.5YR 5/2) silty clay loam, dark brown (7.5YR 3/2) moist, few fine prominent black (N 2.5/) redox depletions and few fine distinct brown (7.5YR 4/4) moist redox concentrations; moderate medium and coarse subangular blocky structure; very hard, friable, moderately sticky and very plastic; common very fine and few fine roots; many very fine tubular pores; strongly effervescent; disseminated lime (12 percent calcium carbonate equivalent) and lime segregated into few fine soft masses and seams; few fine shell fragments; moderately alkaline (pH 8.0); clear wavy boundary. (6 to 17 inches thick)
Bkg3--35 to 40 inches; brown (7.5YR 5/2) silt loam, brown (7.5YR 4/2) moist, few fine prominent black (N 2.5/) moist redox depletions; weak coarse subangular blocky structure; hard, very friable, moderately sticky and moderately plastic; common very fine tubular pores; strongly effervescent; disseminated lime (14 percent calcium carbonate equivalent) and lime segregated into common soft filaments and seams; few fine shell fragments; moderately alkaline (pH 8.2); clear wavy boundary. (5 to 11 inches thick)
Bkg4--40 to 46 inches; light brown (7.5YR 6/3) silt loam, brown (7.5YR 5/2) moist, few fine prominent black (N 2.5/) redox depletions and few fine distinct brown (7.5YR 4/4) moist redox concentrations; massive; hard, very friable, slightly sticky and moderately plastic; common very fine and few fine tubular pores; violently effervescent; disseminated lime (13 percent calcium carbonate equivalent) and lime segregated into many fine irregularly shaped soft filaments and seams; few fine shell fragments; moderately alkaline (pH 8.2); abrupt wavy boundary. (5 to 11 inches thick)
Bkg5--46 to 60 inches; brown (7.5YR 5/2) very fine sandy loam, brown (7.5YR 4/2) moist, few fine prominent black (N 2.5/) redox depletions and few fine distinct brown (7.5YR 4/4) moist redox concentrations; massive; hard, very friable, slightly sticky and slightly plastic; common very fine and few fine tubular pores; violently effervescent; disseminated lime (8 percent calcium carbonate equivalent) and lime segregated into common fine irregularly shaped soft filaments and seams; few fine shell fragments; slightly alkaline (pH 7.8).
TYPE LOCATION: Bear Lake County, Idaho; about 3 miles north of Geneva, Idaho; about 1,650 feet west and 950 feet north of the southeast corner, sec. 15, T.12S., R.46E. Latitude - 42 degrees, 22 minutes, 40 seconds north. Longitude - 111 degrees, 3 minutes, 33 seconds west.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness - 25 to 37 inches
Average annual soil temperature - 41 to 44 degrees F.
Depth to redox features - 20 to 30 inches
Depth to seasonal high water table - 20 to 35 inches December through May
Ap horizon
Hue - 10YR or 2.5Y
Value - 4 or 5 dry, 2 or 3 moist
Chroma - N/ through 2 dry and 1 or 2 moist
Clay content - 28 to 35 percent
Calcium carbonate equivalent - 5 to 15 percent
BA horizon
Hue - 10YR or 2.5Y
Value - 4 or 5 dry
Chroma - N/ through 3 dry
Texture - SIL or SICL
Clay content - 25 to 39 percent
Calcium carbonate equivalent - 5 to 15 percent
Bkg horizon
Hue - 10YR, 7.5YR or 2.5Y
Value - 5 through 7 dry, 3 through 6 moist
Chroma - 2 or 3 dry or moist
Texture - SIL or SICL
Clay content - 25 to 39 percent
Calcium carbonate equivalent - 5 to 15 percent
Bkg5 horizon
Hue - 10YR or 7.5YR
Value - 5 through 7 dry, 4 through 6 moist
Chroma - 2 or 3 moist
Texture - FSL, VFSL, L and GR-SIL
Clay content - 12 to 25 percent
Calcium carbonate equivalent - 5 to 15 percent
COMPETING SERIES: These are the Chiloquinot soils (T). Chiloquinot soils do not have secondary carbonates.
GEOGRAPHIC SETTING: Raynal soils are on stream terraces and flood plains. They have slopes of 0 to 2 percent. They formed in mixed alluvium. The average annual precipitation ranges from 12 to 18 inches and the average annual temperature ranges from 39 to 43 degrees F. The frost-free season is about 70 to 90 days. Elevations are 5,950 to 6,300 feet.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bear Lake, Bern (T) Lago (T) and Thomasfork (T) series. Bear Lake soils are poorly drained and have calcic horizons. Bear Lake and Lago soils have mollic epipedons less than 20 inches thick. Bern soils are moderately well drained and have calcic horizons. Thomasfork soils have a fine, montmorillonitic particle-size control section and cracks greater than 1/2 inch wide in the upper twenty inches of the profile. Bear Lake soils are on floodplains and in meander channels on positions below Raynal soils. Bern soils are on stream terraces above Raynal soils. Lago soils are in slightly lower positions than the Raynal soil. Thomasfork soils are on similar positions to Raynal soils but are located more towards the middle of the valley when associated with Raynal.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; slow or very slow runoff; moderately slow permeability; occasional or rare flooding for brief periods December through May.
USE AND VEGETATION: Used mainly for hayland and small grains.
DISTRIBUTION AND EXTENT: This soil is of small extent in southeastern Idaho. MLRA 13.
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 35 inches (the Ap, BA, Bkg1 and Bkg1 horizons).
Cumulic feature - the soil has an irregular decrease in organic matter with increasing depth.
Particle-size control section - the zone from 10 inches to 40 inches (the BA, the Bkg1, Bkg2, and Bkg3 horizons).