LOCATION MISHWABIC MIEstablished Series
TAXONOMIC CLASS: Coarse-loamy, isotic, nonacid, frigid Typic Epiaquepts
TYPICAL PEDON: Mishwabic silt loam, on a 0 percent slope, in a forested area. (Colors are for moist soil unless otherwise stated.)
Oa--0 to 3 inches; black (5YR 2.5/1); very friable; many very fine to coarse roots; very strongly acid (pH 5.0); abrupt smooth boundary.
Bg--3 to 6 inches; grayish brown (10YR 5/2) silt loam; moderate medium subangular blocky structure; friable; many very fine to medium roots; 10 percent medium prominent yellowish red (5YR 5/8) and 10 percent medium prominent yellowish red (5YR 5/6) masses of oxidized iron; 2 percent gravel; strongly acid (pH 5.2); abrupt smooth boundary.
C1--6 to 13 inches; dark reddish brown (2.5YR 3/4) silt loam; weak thick platy structure; friable; common medium roots; 10 percent medium prominent yellowish red (5YR 5/8) masses of oxidized iron; 5 percent weakly cemented gravel; moderately acid (pH 5.8); clear wavy boundary.
C2--13 to 22 inches; dark reddish brown (2.5YR 3/4) paragravelly silt loam; weak thick platy structure parting to moderate fine subangular blocky structure; friable; few medium roots; 20 percent paragravel; moderately acid (pH 6.0); gradual smooth boundary.
Cr--22 to 25 inches; dark reddish brown (2.5YR 3/4); friable; slightly acid (pH 6.2).
R--25 inches; bedrock.
TYPE LOCATION: Ontonagon County, Michigan, about 1400 feet east of the city of Ontonagon; 335 feet north and 1053 feet west of the southeast corner of sec. 19, T. 52 N., R. 39 W.; USGS Ontonagon North, MI, topographic quadrangle; lat. 46 degrees 52 minutes 53 seconds N. and long. 89 degrees 17 minutes 48 second W.
RANGE IN CHARACTERISTICS: Solum thickness and depth to paralithic material ranges from 20 to 40 inches. Depth to bedrock ranges from 30 to 50 inches. The solum ranges from extremely acid to moderately acid. Gravel content ranges from 0 to 15 percent in the upper part and from 0 to 35 percent in the lower part. Cobble content ranges from 0 to 5 percent and channer content from 0 to 15 percent. Total rock fragment content in the control section averages less than 35 percent.
Oe or Oa horizon
Hue: 5YR or 7.5YR
Value: 2.5 or 3
Chroma: 0 or 1
Some pedons have an A horizon
Hue: 5YR or 7.5YR
Value: 2.5 to 3
Chroma: 1 or 2
Texture: loam or silt loam
Some pedons have an E horizon
Hue: 5YR or 7.5YR
Value: 3 to 5
Chroma: 3 or 4
Texture: loam or silt loam
Bg horizon
Hue: 5YR or 7.5YR
Value: 4 to 6
Chroma: 0 to 2
Texture: loam, fine sandy loam or silt loam
C horizon
Hue: 2.5YR or 5YR
Value: 3 or 4
Chroma: 3 to 6
Texture: loam, fine sandy loam or silt loam
Cr horizon
Hue: 2.5YR or 5YR
Value: 3 or 4
Chroma: 3 to 6
Texture: lenses of silt loam or loam may be present
COMPETING SERIES: These are the Cable and Nevens series. The Cable and Nevens series do not have paralithic contact or bedrock.
GEOGRAPHIC SETTING: Mishwabic soils are on till plains, and on post glacial lake shorelines underlain by bedrock. They formed loamy material overlying siltstone bedrock. Slope ranges from 1 to 6 percent. Mean annual precipitation ranges from 30 to 36 inches, and mean annual air temperature ranges from 40 to 45 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Big Iron, Nonesuch, Croswell, Greenstone and Ubly soils. The somewhat poorly drained Big Iron and moderately well drained Nonesuch and Ubly soils are in higher landscape positions as the Mishwabic soils. The moderately well drained Croswell soils are on beach ridges. The somewhat poorly drained Greenstone soils are shallow and are in higher landscape positions.
DRAINAGE AND PERMEABILITY: Poorly drained. The soil has a seasonal high water table that is perched above the siltstone bedrock to the surface from December to June. Permeability is moderate in the solum and moderately slow in the paralithic material. Surface runoff is slow.
USE AND VEGETATION: Most areas are forested. The major species are red maple, green ash, quaking aspen, yellow birch, white spruce, northern white cedar, speckled alder and balsam fir.
DISTRIBUTION AND EXTENT: Western Upper Peninsula of Michigan and possibly Northern Wisconsin. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota; MLRA SSO 10-8 (Marquette, Michigan).
SERIES ESTABLISHED: Ontonagon County, Michigan, 2007. The name is derived from a State Forest.
REMARKS: Diagnostic horizons and features in this pedon include:
Gleyed horizon: 3 to 6 inches;
Paralithic Contact: 22 inches;
Lithic Contact: 25 inches.
Only series status, responsibility, and scrivener's errors changed - 4/09.