LOCATION ROSELLE MOEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, mesic Oxyaquic Hapludults
TYPICAL PEDON: Roselle silt loam - in a basin on a high, undulating terrace with 5 percent slope in fescue pasture at an elevation of 720 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 3 inches; brown (10YR 4/3) silt loam; pale brown (10YR 6/3) (dry); weak fine subangular blocky structure; friable; many very fine and fine roots; 1 percent fine granite gravel; slightly acid (pH 6.3); abrupt wavy boundary. (2 to 4 inches thick)
E--3 to 7 inches; dark yellowish brown (10YR 4/4) silt loam; very pale brown (10YR 7/4) (dry); weak medium platy structure parting to weak very fine subangular blocky; friable; common very fine and fine roots; common faint yellowish brown (10YR 5/4) clay depletions; 1 percent fine granite gravel; moderately acid (pH 5.6); clear smooth boundary. (0 to 7 inches thick)
Bt1--7 to 15 inches; yellowish brown (10YR 5/6) silt loam; weak coarse subangular blocky structure parting to moderate very fine subangular blocky;friable; common very fine and fine roots; common faint clay films; 1 percent granite gravel and 1 percent granite cobbles; strongly acid (pH 5.3); clear smooth boundary. (Combined thickness of the Bt horizonis 6 to 22 inches)
2Bt2--15 to 22 inches; yellowish brown (10YR 5/8) loam; weak medium prismatic structure parting to moderate very fine and fine subangular blocky; firm; few very fine roots; many faint clay films; few fine distinct yellowish brown (10YR 5/4) clay depletions; 3 percent granite gravel and 1 percent granite cobbles; strongly acid (pH 5.1); clear wavy boundary.
2Bt3--22 to 29 inches; yellowish brown (10YR 5/6) clay loam; moderate medium prismatic structure parting to moderate fine subangular blocky; firm; very few very fine roots; many distinct clay films and few prominent clay flows; few medium prominent strong brown (7.5YR 4/6) masses of iron and manganese accumulation; 6 percent fine rounded granite gravel; strongly acid (pH 5.1); gradual smooth boundary.
2Bt4--29 to 39 inches; yellowish red (5YR 4/6) sandy clay loam; moderate coarse prismatic structure parting to moderate fine subangular blocky; firm; very few very fine roots; common distinct clay films and common prominent clay flows; few prominent brown (10YR 5/3) iron depletions in vertical seams; 5 percent fine rounded granite gravel; very strongly acid (pH 5.0); gradual smooth boundary.
2Bt5--39 to 48 inches; strong brown (7.5YR 4/6) sandy clay loam; moderate thick platy structure; firm; few distinct clay films and common prominent clay flows; common yellowish brown (10YR 5/4) masses of iron and manganese accumulation on faces of peds; 4 percent fine rounded granite gravel; very strongly acid (pH 5.0); gradual smooth boundary.
2Bt6--48 to 57 inches; strong brown (7.5YR 4/6) coarse sandy loam; moderate thick platy structure; firm; few distinct clay films and common prominent clay flows; common brown (7.5YR 5/3) iron depletions; 4 percent fine rounded gravel; very strongly acid (pH 4.9); gradual smooth boundary. (Combined thickness of the 2Bt horizon is 8 to 60 inches).
2BC1--57 to 67 inches; strong brown (7.5YR 5/6) coarse sandy loam; weak thick platy structure; firm; few distinct clay films and few prominent clay flows; few pinkish gray (7.5YR 6/2) iron depletions; few medium black masses of iron and manganese accumulation; 3 percent highly decomposed granite gravel; very strongly acid (pH 4.8); gradual smooth boundary.
2BC2--67 to 80 inches; strong brown (7.5YR 5/6) coarse sandy loam; weak thick platy structure; friable; very few prominent clay flows; common fine and medium black masses of iron and manganese accumulation; 3 percent highly decomposed granite gravel; very strongly acid (pH 4.8); gradual smooth boundary. (Combined thickness of the 2BC horizon is 0 to 30 inches)
TYPE LOCATION: Madison County, Missouri; about 2 miles northeast of Roselle; 750 feet south and 1400 feet east of the northwest corner of sec. 33, T. 34 N., R. 5 E. Latitude 37 degrees, 36 minutes, 42.0 seconds N., longitude 90 degrees, 29 minutes, 37.0 seconds W., NAD83.
RANGE IN CHARACTERISTICS:
Depth to 2Bt: 12 to 22 inches
Solum thickness: 45 to greater than 80 inches
Total rock fragments: 0 to 15 percent throughout
A horizon
Hue: 10YR
Value: 4
Chroma: 3
Texture: silt loam
Reaction: slightly acid or moderately acid
E horizon
Hue: 10YR
Value: 4
Chroma: 4
Texture: silt loam
Reaction: slightly acid or moderately acid
Bt horizon
Hue: 10YR or 7.5YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silt loam or silty clay loam
Reaction: slightly acid to very strongly acid
2Bt horizon
Hue: 10YR to 5YR
Value: 4 to 6
Chroma: 3 to 8
Texture: loam, clay loam, sandy clay loam
Rock fragments: 0 to 6 percent gravel, 0 to 10 percent cobbles, and 0 to 1 percent stones
Reaction: strongly to very strongly acid
2BC horizon
Hue: 10YR or 7.5YR
Value: 5 or 6
Chroma: 3 to 6
Texture: coarse sandy loam
Rock fragments: 3 to 10 percent gravel, 0 to 10 percent cobbles
Reaction: strongly acid to very strongly acid
2C or 3C horizon (Where present)
Hue: 7.5YR or 10YR
Value: 4 to 7
Chroma: 3 or 8
Fine-earth: coarse sandy loam
Rock fragments: 2 to 6 percent gravel 0 to 55 stones and boulders
Reaction: very strongly acid
COMPETING SERIES: These are the Chilmark, Hassler, Thurmont, and Tulip series. Chilmark soils have a mean annual soil temperature of less than 54 degrees F.. Hassler soils have a lithic contact from 40 to 60 inches. Thurmont soils formed in material weathered from metamorphic rocks. Tulip soils average 15 to 34 percent rock fragments in the particle-size control section.
GEOGRAPHIC SETTING: The Roselle soils are on terraces and footslopes on basin-floor remnants in mountain basins. The soils formed in colluvium and alluvium derived from coarse grained, acid igneous rocks, predominantly granite. Slopes range from 3 to 8 percent. Mean annual temperature is about 54 to 58 degrees F., and the mean annual precipitation is about 38 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Courtois, Delassus, Irondale, Killarney, Knobtop, Relfe, Secesh, Skranka, Syenite, and Trackler soils. Courtois soils are fine textured, have a stone line, and are on similar landscape postions. Delassus and the loamy-skeletal Killarney soils have a fragipan and are at higher elevations. Irondale, and Taumsauk soils are loamy-skeletal and are higher in the landscape. Knobtop soils are moderately deep, fine-silty and are on ridgetops of mountainous areas. Relfe and Secesh soils are better drained and are on floodplains and lower terraces. Skranka soils are fine textured and have a higher base saturation and are on similar positions. Syenite soils are well drained, moderately deep to bedrock, and are at higher elevations. Trackler soils are deep to hard igneous rocks and are at higher elevations.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff is medium. Permeability is moderate. A seasonal high water table is at a depth of 2.0 to 4.0 feet during winter or early spring in most years.
USE AND VEGETATION: Most areas are in grasses and legumes. The soils are used mainly for pasture and hay crops. Other areas are in timber and a few areas are used for grain production. Native vegetation was hardwoods and shortleaf pine.
DISTRIBUTION AND EXTENT: These soils are on igneous landscapes in the St. Francois Mountains, a physiographic subdivision of the Missouri Ozarks (MLRA 116A). The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Madison County, Missouri, 1998.
REMARKS: The CEC/clay ratio for this pedon is .39, which would place it in the subactive family. However, the majority of the profiles sampled are in the active family, so active was used for the classification.Diagnostic horizons and features recognized in this pedon:1) Ochric epipedon - the zone from the surface of the soil to a depth of 7 inches (Ap and E horizons)2) argillic horizon - the zone from 7 to 57 inches (Bt1, Bt2, 2Bt3, 2Bt4, 2Bt5, 2Bt6 horizons)
ADDITIONAL DATA: University of Missouri soil characterization lab number M9312331.These soils were previously mapped with Courtois, Delassus, and Syenite soils.