LOCATION BARRINGTON IL+MNEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Oxyaquic Argiudolls
TYPICAL PEDON: Barrington silt loam on a south-facing convex slope of 3 percent at an elevation of 191 meters (627 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 28 cm (0 to 11 inches); very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; moderate fine granular structure; friable; few very fine roots; slightly acid; abrupt smooth boundary. [25 to 46 cm (10 to 18 inches) thick]
BA--28 to 41 cm (11 to 16 inches); brown (10YR 4/3) silty clay loam; weak fine subangular blocky structure parting to moderate fine granular; friable; few very fine roots; common faint very dark grayish brown (10YR 3/2) organic coatings on faces of peds; slightly acid; clear smooth boundary. [0 to 20 cm (0 to 8 inches) thick]
Bt1--41 to 53 cm (16 to 21 inches); dark yellowish brown (10YR 4/4) silty clay loam; weak fine prismatic structure parting to moderate fine angular blocky; friable; few very fine roots; few distinct very dark grayish brown (10YR 3/2) organic coatings on faces of peds; common distinct brown (10YR 4/3) clay films on faces of peds; slightly acid; clear smooth boundary.
Bt2--53 to 66 cm (21 to 26 inches); yellowish brown (10YR 5/4) silty clay loam; weak fine prismatic structure parting to moderate fine angular blocky; friable; few distinct brown (10YR 4/3) clay films on faces of peds; neutral; clear smooth boundary.
Bt3--66 to 81 cm (26 to 32 inches); yellowish brown (10YR 5/4) silty clay loam; weak fine prismatic structure parting to moderate medium angular blocky; friable; few distinct brown (10YR 4/3) clay films of faces of peds; few fine distinct light brownish gray (10YR 6/2) iron depletions in the matrix; neutral; clear smooth boundary. [Combined thickness of the Bt horizon is 25 to 64 cm (10 to 25 inches).]
2Bt4--81 to 94 cm (32 to 37 inches); yellowish brown (10YR 5/4) silt loam; weak fine prismatic structure parting to weak medium angular blocky; friable; very few distinct brown (10YR 4/3) clay films on faces of peds; common fine distinct light brownish gray (10YR 6/2) iron depletions in the matrix; very slightly effervescent; slightly alkaline; clear smooth boundary. [8 to 30 cm (3 to 12 inches) thick]
2BC--94 to 107 cm (37 to 42 inches); yellowish brown (10YR 5/4) silt loam with thin strata of fine sandy loam; weak fine prismatic structure; friable; few fine distinct yellowish brown (10YR 5/6) masses of oxidized iron in the matrix; common fine distinct light brownish gray (10YR 6/2) iron depletions in the matrix; slightly effervescent; slightly alkaline; clear smooth boundary. [0 to 20 cm (0 to 8 inches) thick]
2C--107 to 152 cm (42 to 60 inches); yellowish brown (10YR 5/4) stratified silt loam and fine sandy loam; massive; friable; few fine distinct yellowish brown (10YR 5/6) masses of oxidized iron in the matrix; common fine distinct light brownish gray (10YR 6/2) iron depletions in the matrix; strongly effervescent; slightly alkaline.
TYPE LOCATION: Livingston County, Illinois; 122 meters (400 feet) north and 58 meters (190 feet) west of the center of sec. 16, T. 30 N., R. 3 E.; USGS Long Point, IL topographic quadrangle; lat. 41 degrees 04 minutes 07 seconds N. and long. 88 degrees 52 minutes 54 seconds W., NAD 27; UTM Zone 16T, 0341910 easting and 4548092 northing, NAD 83.
RANGE IN CHARACTERISTICS: Depth to the base of soil development ranges from 64 to 114 cm (25 to 45 inches). The depth to carbonates ranges from 51 to 102 cm (20 to 40 inches). The depth to horizons averaging greater than 15 percent sand is 56 to 102 cm (22 to 40 inches). The mollic epipedon ranges from 25 to 46 cm (10 to 18 inches) in thickness.
The Ap or A horizon has hue of 10YR, value of 2 or 3, and chroma of 1 to 3. It is silt loam. Reaction ranges from moderately acid to neutral depending upon liming practices.
The BA and Bt horizons has hue of 10YR, value of 4 to 6, and chroma of 3 to 6. It is silty clay loam or silt loam. Some pedons have redoximorphic features with chroma of 2 or less in the lower part. Reaction ranges from moderately acid to slightly alkaline.
The 2Bt and 2BC horizons have hue of 10YR, 7.5YR, or 2.5Y; value of 4 to 6; and chroma of 3 to 6. It is stratified silt loam, sandy loam, very fine sandy loam, loam, or clay loam. Redoximorphic features have chroma of 2 to 6. Reaction ranges from slightly acid to moderately alkaline.
The C horizon has hue of 10YR, 2.5Y, or 5Y; value of 4 to 6; and chroma of 1 to 6. It is stratified medium textured materials such as silt loam and loam that contains thin strata of other textures. Textures of individual horizons range from clay loam to very fine sand and their gravelly analogues. Reaction is slightly or moderately alkaline and contains carbonates.
COMPETING SERIES: These are the Assumption, Aviston, Blackberry, Buckhart, Catlin, Clare, Dana, Danabrook, Geryune, Graymont, Harrison, Keltner, Saybrook, and Totanang soils. Assumption, Aviston, Clare, Dana, and Totanang soils are more than 102 cm (40 inches) to carbonates. Blackberry, Buckhart, Catlin, and Harrison soils do not have as much as 15 percent sand within a depth of 102 cm (40 inches). Danabrook, Geryune, Graymont, and Saybrook soils are not stratified in the lower part of the series control section and have a well graded sand fraction to a depth of 152 cm (60 inches) or more. Keltner soils have a paralithic contact in the series control section.
GEOGRAPHIC SETTING: Barrington soils are on nearly level to gently undulating convex slopes on outwash plains, stream terraces, and lake plains of Wisconsinan age. Slope gradients commonly are between 1 and 3 percent but range from 0 to 7 percent. These soils formed in 56 to 102 cm (22 to 40 inches) of loess or other silty material and in the underlying calcareous, stratified loamy outwash. Mean annual air temperature ranges from 7 to 11 degrees C (45 to 52 degrees F), mean annual precipitation from 760 to 970 mm (30 to 38 inches), frost free days range from 140 to180, and the elevation ranges from 165 to 415 meters (540 to 1360 feet) above mean sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Mundelein and Grays series. The somewhat poorly drained Mundelein soils are on broad nearly level areas adjacent to Barrington soils and form a drainage sequence with them. The moderately well drained Grays soils have a thinner dark colored surface layer and are on similar landforms adjacent to Barrington soils.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Moderately well drained. An apparent seasonal high water table is at a depth of 61 to 107 cm (2.0 to 3.5 feet) below the surface at some time between February and April in normal years. The potential for surface runoff is negligible to medium. Saturated hydraulic conductivity is moderately high to high (4.23 to 14.11 micrometers per second). Permeability is moderate.
USE AND VEGETATION: Most areas are cropped. Corn, soybeans, small grain, and hay are the principal crops. Natural vegetation was prairie grass.
DISTRIBUTION AND EXTENT: Northern Illinois and Minnesota. This series is of moderate extent in MLRAs 103, 108A, and 110.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana.
SERIES ESTABLISHED: Kendall County, Illinois, 1973.
REMARKS: Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from the surface to a depth of 28 cm (11 inches) (Ap horizon); argillic horizon - the zone from a depth of 41 to 94 cm (16 to 37 inches) (Bt1, Bt2, Bt3, and 2Bt4 horizons); discontinuity at a depth of 81 cm (32 inches) - the contact between loess and outwash.