LOCATION STREATOR IL
Established Series
Rev. GOW-JDA-JBF-AAC
12/2015
STREATOR SERIES
The Streator series consists of very deep, poorly drained soils formed in 76 to 127 cm (30 to 50 inches) of loess and the underlying till or lakebed sediments. These soils are on till plains or lake beds. Slope gradients commonly are less than one percent. Mean annual temperature is about 10 degrees C (50 degrees F), and mean annual precipitation is about 940 mm (37 inches).
TAXONOMIC CLASS: Fine, smectitic, mesic Vertic Endoaquolls
TYPICAL PEDON: Streator silty clay loam, 0 to 2 percent slopes, in a cultivated field at an elevation of 224 meters (738 feet) above mean sea level. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 23 cm (0 to 9 inches); black (10YR 2/1) silty clay loam, dark gray (10YR 4/1) dry; weak fine and medium granular structure; friable; common very fine roots; neutral; clear smooth boundary.
A--23 to 33 cm (9 to 13 inches); black (10YR 2/1) silty clay loam, dark gray (10YR 4/1) dry; moderate fine granular structure; friable; common very fine roots; neutral; clear smooth boundary. [Combined thickness of the A horizon is 25 to 51 cm (10 to 20 inches).]
BA--33 to 43 cm (13 to 17 inches); dark gray (10YR 4/1) silty clay loam; weak medium prismatic structure parting to moderate fine and very fine subangular blocky; friable; common very fine roots; common fine distinct yellowish brown (10YR 5/4) spherical masses of oxidized iron with diffuse boundaries in the matrix; neutral; clear smooth boundary. [8 to 13 cm (3 to 5 inches) thick]
Bg--43 to 61 cm (17 to 24 inches); gray (5Y 5/1) silty clay; moderate medium prismatic structure parting to moderate fine subangular blocky; firm; common very fine roots; many distinct very dark gray (10YR 3/1) organic coatings on faces of peds; common fine prominent yellowish brown (10YR 5/4) spherical masses of oxidized iron with diffuse boundaries and common fine prominent black (10YR 2/1) spherical iron-manganese nodules with diffuse boundaries in the matrix; neutral; clear smooth boundary. [8 to 20 cm (3 to 8 inches) thick]
Btg1--61 to 84 cm (24 to 33 inches); gray (5Y 5/1) silty clay; moderate medium prismatic structure parting to moderate medium subangular blocky; firm; common very fine roots; many distinct dark gray (10YR 4/1) clay films on faces of peds; common fine prominent yellowish brown (10YR 5/6) spherical masses of oxidized iron with diffuse boundaries and common fine and medium prominent black (10YR 2/1) spherical iron-manganese nodules with diffuse boundaries in the matrix; neutral; gradual smooth boundary.
Btg2--84 to 107 cm (33 to 42 inches); gray (5Y 5/1) silty clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; friable; few very fine roots; common distinct dark gray (10YR 4/1) clay films on faces of peds; common fine prominent yellowish brown (10YR 5/6) and brown (10YR 5/3) spherical masses of oxidized iron with diffuse boundaries and common fine and medium prominent black (10YR 2/1) spherical iron-manganese nodules with diffuse boundaries in the matrix; neutral; clear wavy boundary. [Combined thickness of the Btg horizon is 41 to 61 cm (16 to 24 inches)].
2Btg3--107 to 142 cm (42 to 56 inches); grayish brown (2.5Y 5/2) clay; weak medium prismatic structure; firm; few very fine roots; few distinct dark gray (10YR 4/1) clay films on faces of peds; common fine prominent yellowish brown (10YR 5/6) and distinct light olive brown (2.5Y 5/4) spherical masses of oxidized iron with diffuse boundaries in the matrix; many fine faint gray (5Y 6/1) iron depletions lining pores; about 5 percent rock fragments; slightly alkaline; gradual wavy boundary. [10 to 46 cm (4 to 18 inches) thick]
2BCkg--142 to 173 cm (56 to 68 inches); grayish brown (2.5Y 5/2) silty clay; weak coarse prismatic structure; very firm; few very fine roots; common prominent light gray (5Y 7/1) carbonate coatings on faces of peds and lining root pores; common fine prominent yellowish brown (10YR 5/6) and many fine and medium distinct light olive brown (2.5Y 5/4) spherical masses of oxidized iron with diffuse boundaries and common fine prominent white (10YR 8/1) irregular carbonate nodules in the matrix; many fine faint gray (5Y 6/1) iron depletions lining pores; about 5 percent rock fragments; slightly effervescent; moderately alkaline; gradual wavy boundary. [0 to 30 cm (0 to 12 inches) thick]
2Cg--173 to 203 cm (68 to 80 inches); grayish brown (2.5Y 5/2) silty clay; massive; very firm; many fine and medium distinct light olive brown (2.5Y 5/4) spherical masses of oxidized iron with diffuse boundaries in the matrix; common fine faint gray (5Y 6/1) iron depletions in the matrix; about 5 percent rock fragments; strongly effervescent; moderately alkaline.
TYPE LOCATION: Marshall County, Illinois; 2,544 feet north and 150 feet west of southeast corner of sec. 36, T. 29 N., R. 1 E.; USGS Minonk topographic quadrangle; lat. 40 degrees 55 minutes 57.9 seconds N. and long. 89 degrees 02 minutes and 53.9 seconds W.; UTM Zone 16, 327554 easting and 4533312 northing, NAD 83.
RANGE IN CHARACTERISTICS:
Depth to the base of soil development: 102 to 178 cm (40 to 70 inches)
Thickness of loess: typically 89 to 114 cm (35 to 45 inches) but ranges from 76 to 127 cm (30 to 50 inches)
Thickness of the mollic epipedon: 25 to 61 cm (10 to 24 inches)
Reaction in the solum: typically neutral but ranges from slightly acid to moderately alkaline
Depth to carbonates: 89 to 152 cm (35 to 60 inches)
Average clay content of the particle-size control section: 35 to 45 percent
Dominant clay mineral: loess - smectite, till or lakebed sediments - illite
Ap and/or A horizons:
Hue: 10YR or neutral
Value: 2 to 3
Chroma: 0 to 2
Texture: commonly silty clay loam but ranges to silty clay
BA or AB horizon (where present):
Hue: 10YR, 2.5Y, or neutral
Value: 3 to 6
Chroma: 0 to 2
Texture: silty clay loam or silty clay
Bg and/or Btg horizons:
Hue: 10YR, 2.5Y, 5Y, or neutral
Value of 4 to 6
Chroma: 0 to 2
Texture: silty clay loam or silty clay
2Btg and/or 2BCkg horizons:
Hue: 10YR, 2.5Y, 5Y, or neutral
Value: 4 to 6
Chroma: 0 to 2
Texture: silty clay, clay, or silty clay loam
Coarse fragment content: 0 to 8 percent
2Cg horizon:
Hue: 10YR, 2.5Y or 5Y
Value: 4 to 6
Chroma: 1 to 6
Texture: silty clay or clay
Coarse fragment content: 0 to 10 percent
Moist bulk density: ranges from 1.55 to 1.78 g/cm3
COMPETING SERIES: These are
Carlow,
Chequest,
Cove,
Fults,
Kalona,
Kings,
Lanyon,
Mackerlake,
Marna,
Moline,
Rosedell,
Titus,
Waldorf, and
Woodbury soils. Carlow soils are moderately acid to very strongly acid in the middle third of the series control section. Chequest, Cove, Fults, and Kalona soils do not have carbonates within 152 cm (60 inches). Kings and Moline soils average more than 45 percent clay in the particle-size control section. Lanyon and Rosedell soils have carbonates within a depth of 89 cm (35 inches). Mackerlake soils have a sodium absorption ratio that averages more than 8 in the lower two-thirds of the series control section. Marna, Titus, and Woodbury soils average less than 35 percent clay in the lower part of the series control section. Waldorf soils have a moist bulk density less than 1.55 gm/cc in the lower part of the series control section.
GEOGRAPHIC SETTING: The Streator soils are level to nearly level areas on till plains or lake beds of Wisconsinan Age. Streator soils formed in loess or silty material and in silty clay or clay till or lakebed sediments. Slope gradients commonly are less than one percent but range to 3 percent. Summers are hot and winters are cold. Mean annual air temperature ranges from 8.3 to 11.7 degrees C (47 to 53 degrees F), mean annual precipitation ranges from 864 to 1016 mm (34 to 40 inches), frost-free period ranges from 150 to 185 days, and elevation ranges from 187 to 231 meters (614 to 758 feet) above mean sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: The most common associates are the moderately well drained
Wenona and the somewhat poorly drained
Rutland soils that form a drainage sequence with the Streator soils. The Streator soils are also associated with the somewhat poorly drained
Kernan soils which are better drained and have a lighter colored A horizon.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Poorly drained. The potential for runoff is very low to negligible. The seasonal high water table is within 30 cm (1 foot) of the soil surface and there is frequent ponding during the period of January through May. Saturated hydraulic conductivity is moderately high (1.41 to 4.23 micrometers/s) in the loess or silty material and moderately low to moderately high (0.14 to 1.41 micrometers/s) in the till or lakebed sediments. Permeability is moderately slow in the loess or silty material and slow to very slow in the till or lakebed sediments.
USE AND VEGETATION: Used mostly for cultivated crops such as corn and soybeans. Native vegetation is marsh grasses.
DISTRIBUTION AND EXTENT: North-central and eastern Illinois. Extent is moderate in MLRAs 108 and 110.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana.
SERIES ESTABLISHED: LaSalle County, Illinois, 1969.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
mollic epipedon - the zone from the surface to a depth of 33 cm (0 to 13 inches) (Ap and A horizons);
cambic horizon - the zone from 33 to 173 cm (13 to 68 inches) (BA, Bg, Btg1, Btg2, 2Btg3, and 2BCkg horizons);
lithologic discontinuity - at a depth of 107 cm (42 inches) (contact between the Btg2 and 2Btg3 horizons).
________________________________________
National Cooperative Soil Survey
U.S.A.