LOCATION DEBOLT MIEstablished Series
TAXONOMIC CLASS: Clayey over sandy or sandy-skeletal, mixed, semiactive, frigid Oxyaquic Glossudalfs
TYPICAL PEDON: Debolt sandy loam on a lake plain in permanent pasture at an elevation of 1,183 feet. (Colors are for moist soils unless otherwise stated.)
A--0 to 3 inches; very dark grayish brown (10YR 3/2) sandy loam; dark grayish brown (10YR 4/2) dry; strong medium granular structure parting to strong fine granular; friable; many very fine and common fine and medium roots; 1 percent gravel; moderately acid; abrupt smooth boundary. (3 to 6 inches thick)
E--3 to 7 inches; 55 percent grayish brown (10YR 5/2) and 45 percent pinkish gray (7.5YR 6/2) sandy loam, light brownish gray (10YR 6/2) and white (7.5YR 8/1) dry; moderate medium subangular blocky structure parting to strong fine subangular blocky; friable; common very fine, fine and medium roots; few distinct patchy brown (7.5YR 5/2) silt coats on vertical faces of peds; moderately acid; clear broken boundary. (2 to 5 inches thick)
Bt/E--7 to 10 inches; brown (7.5YR 4/4) clay loam (B); occurs about 77 percent of the horizon surrounded by grayish brown (10YR 5/2) sandy loam (E); light gray (10YR 7/2) dry; strong medium subangular blocky structure; firm; common very fine, fine and medium roots; common very fine low continuity tubular pores; very few prominent patchy black (7.5YR 2.5/1) organic coats on vertical faces of peds; common distinct discontinuous brown (7.5YR 4/3) clay films on vertical faces of peds; 1 percent gravel; moderately acid; clear wavy boundary. ({0} 2 to 4 inches thick)
Bt1--10 to 18 inches; brown (7.5YR 4/4) clay; strong medium angular blocky structure; firm; common very fine and fine roots; common very fine low continuity tubular pores; very few prominent patchy black (7.5YR 2.5/1) organic coats on vertical faces of peds; common distinct continuous brown (7.5YR 4/3) clay films on vertical and horizontal faces of peds; 1 percent mixed gravel; moderately acid; clear wavy boundary.
Bt2--18 to 28 inches; brown (7.5YR 5/4) clay; strong coarse angular blocky structure parting to strong medium angular blocky; firm; common very fine and fine roots; common very fine low continuity tubular pores; common distinct continuous brown (7.5YR 4/3) clay films on vertical and horizontal faces of peds; 1 percent gravel; few fine faint strong brown (7.5YR 5/6) masses of iron accumulation; strongly acid; clear wavy boundary. (Total thickness of the Bt1 and Bt2 horizons is 10 to 32 inches)
Bt3--28 to 33 inches; strong brown (7.5YR 5/6) sandy clay loam; strong coarse subangular blocky structure parting to moderate medium subangular blocky; firm; common very fine roots; few distinct patchy brown (7.5YR 5/4) clay films on vertical faces of peds; common distinct continuous strong brown (7.5YR 5/6) clay bridging on vertical and horizontal faces of peds; 2 percent gravel; common fine and medium faint strong brown (7.5YR 5/6) masses of iron accumulation; strongly acid; abrupt wavy boundary. (0 to 8 inches thick)
2C1--33 to 56 inches; yellowish brown (10YR 5/4) sand; single grain; loose; 1 percent gravel; common fine and medium prominent dark reddish brown (5YR 3/3) and reddish brown (5YR 4/4) masses of iron accumulation; moderately acid; gradual wavy boundary.
2C2--56 to 65 inches; light yellowish brown (10YR 6/4) sand; single grain; loose; 1 percent gravel; common fine prominent reddish brown (5YR 4/4) masses of iron accumulation; slightly acid; gradual wavy boundary.
2C3--65 to 80 inches; brown (7.5YR 5/4) sand and pale brown (10YR 6/3) loamy sand; single grain; loose; 1 percent gravel; common medium and coarse prominent brownish yellow (10YR 6/6) and many medium and coarse distinct yellowish brown (10YR 5/4) masses of iron accumulation; neutral.
TYPE LOCATION: Roscommon County, Michigan; about 350 feet south and 650 feet west of the northeast corner of section 23, T. 24 N., R. 1 W., Au Sable Township; USGS St. Helen N W 7.5 topographic quadrangle; lat. 44 degrees 27 minutes 50 seconds N. and long. 84 degrees, 23 minutes 31 8 seconds W.
RANGE IN CHARACTERISTICS: The depth to the base of the argillic horizon ranges from 20 to 40 inches. Gravel content is 1 to 5 percent in the upper portion of the profile and 0 to 10 percent in the lower part. The pH ranges from neutral to strongly acid throughout.
The A horizon has hue of 10YR, value of 2 or 3, and chroma of 1 or 2. The texture is loam or sandy loam. In cultivated pedons an Ap horizon 6 to 10 inches thick is present.
The E horizon and the E part of the B/E horizon has a hue of 7.5YR or 10YR, value of 5 or 6, chroma of 2 or 3. The texture is sandy loam or loam.
The Bt part of the Bt/E and Bt1 and Bt2 horizon has a hue of 7.5YR or 10YR, value of 3 to 5 and chroma of 4 to 6. The texture is clay, clay loam, silty clay loam, or silty clay. The percent of clay averages 35 to 50 percent.
The lower Bt3 horizon has colors similar to the Bt1 and Bt2. The texture is sandy clay loam, clay loam or sandy clay.
Some pedons have thin lenses of loamy fine sand and fine sandy loam in the Bt horizons.
The 2C horizon has hue of 7.5YR or 10YR, value of 5 or 6, and chroma of 4 to 6. It is dominantly sand but also includes loamy sand or thin strata of loamy sand.
COMPETING SERIES: There are no other series in this family. Similar soils are the Dighton series. Dighton is well drained.
GEOGRAPHIC SETTING: The Debolt soils formed in clayey over sandy glaciofluvial deposits of Wisconsinian age on lake plains. Slopes range from 0 to3 percent. Mean annual precipitation ranges from 28 to 32 inches, and the mean annual temperature ranges from 40 to 44 degrees F. The frost free period is 100 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: The well drained Dighton soils are on slightly higher landform positions. The moderately well drained Kellogg soils are on similar landform positions. The somewhat poorly drained Pinewood soils are on slightly lower landform positions. The poorly drained Wakeley soils are in nearby depressions and narrow drainageways.
DRAINAGE AND PERMEABILITY: Moderately well drained. The potential surface runoff is medium. Permeability is moderately slow in the upper part and rapid or very rapid in the lower part.
USE AND VEGETATION: Most areas are idle or in pasture. A smaller part is in forest. The native vegetation was chiefly sugar maple, American beech, American basswood, American elm, and some eastern white pine and eastern hemlock.
DISTRIBUTION AND EXTENT: Northern Lower Peninsula of Michigan. The series is of minor extent.
MLRA OFFICE RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Roscommon County, Michigan; 1998. Source of the name is a local abandoned settlement in the county.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon - the zone from the surface to 7 inches (A and E
horizon);
glossic horizon - the zone from 7 to 10 inches (B/E horizon);
albic horizon - the zone from 3 to 7 inches (E horizon);
argillic horizon - the zone from 7 to 33 inches (B part of the B/E and Bt horizons);
oxyaquic feature - saturation at depths greater than 18 inches inferred
from redox concentrations; a lithologic discontinuity from clayey to
sandy material at 33 inches.