LOCATION MYLREA WIEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, frigid Aquic Dystrudepts
TYPICAL PEDON: Mylrea silt loam - on a 4 percent north-facing convex slope in a wooded area at an elevation of about 1,271 feet. (Colors are for moist soil unless otherwise stated.)
A--0 to 3 inches; very dark grayish brown (10YR 3/2) silt loam, grayish brown (10YR 5/2) dry; moderate medium subangular blocky structure; friable; many fine roots; about 3 percent pebbles; very strongly acid; clear wavy boundary. (0 to 5 inches thick)
Bs--3 to 9 inches; dark yellowish brown (10YR 4/4) silt loam; moderate medium and coarse subangular blocky structure; friable; common fine roots; about 3 percent pebbles; very strongly acid; clear wavy boundary. (0 to 9 inches thick)
E--9 to 12 inches; light brownish gray (10YR 6/2) silt loam; few fine prominent strong brown (7.5YR 5/6) mottles; moderate medium platy structure parting to moderate very fine subangular blocky; friable; common fine roots; about 4 percent pebbles; very strongly acid; clear wavy boundary. (0 to 8 inches thick)
B/E--12 to 19 inches; dark yellowish brown (10YR 4/4) silt loam (Bt); few fine distinct strong brown (7.5YR 5/6) mottles; moderate medium and coarse subangular blocky structure; friable; pale brown (10YR 6/3) tongues of silt loam (E) penetrate this horizon and amount to 20 percent of the horizon; weak thin platy structure; very friable; few fine roots; about 4 percent pebbles; very strongly acid; gradual wavy boundary. (0 to 10 inches thick)
Bt1--19 to 28 inches; yellowish brown (10YR 5/4) silt loam; common medium distinct strong brown (7.5YR 5/6) and light brownish gray (10YR 6/2) mottles; moderate coarse subangular blocky structure; friable; few fine roots; few faint dark brown (7.5YR 4/4) clay films on horizontal faces of peds; pale brown (10YR 6/3) tongues in upper part of this horizon; about 8 percent pebbles; very strongly acid; clear wavy boundary. (0 to 9 inches thick)
2Bt2--28 to 33 inches; dark brown (7.5YR 4/4) fine sandy loam; common medium distinct strong brown (7.5YR 5/6) and pinkish gray (7.5YR 6/2) mottles; moderate coarse subangular blocky structure; friable; common distinct dark brown (7.5YR 4/2) clay films on faces of peds; about 5 percent pebbles; very strongly acid; gradual wavy boundary. (5 to 18 inches thick)
2BC--33 to 38 inches; dark brown (7.5YR 4/4) gravelly fine sandy loam; common medium distinct strong brown (7.5YR 5/6) and pinkish gray (7.5YR 6/2) mottles; moderate coarse subangular blocky structure; friable; about 15 percent pebbles; strongly acid; clear wavy boundary. (4 to 15 inches thick)
3C--38 to 60 inches; brown (10YR 5/3) extremely gravelly loamy coarse sand; few fine prominent strong brown (7.5YR 5/6) mottles; single grain; loose; about 60 percent angular pebbles; strongly acid.
TYPE LOCATION: Marathon County, Wisconsin; about 5 miles northwest of Mosinee; 750 feet east and 100 feet south of the northwest corner of sec. 3, T. 27 N., R. 6 E.
RANGE IN CHARACTERISTICS: Solum thickness is typically 30 to 48 inches, but ranges from 24 to 60 inches. Thickness of loess or other silty deposits over the residuum weathered from granite rock (grus) ranges from 15 to 36 inches. Below the influence of agriculture lime, reaction is slightly acid to very strongly acid in the solum and in the substratum. The control section averages between 7 and 18 percent clay and between 30 and 50 percent fine sand or coarser. Volume of pebbles is 0 to 10 percent in the silty deposit, 2 to 20 percent in the till, and 15 to 90 percent in the residuum (grus). See REMARKS section for a discussion on the character of the coarse fragments in the residuum. Volume of cobbles ranges from 0 to 2 percent in the upper part of the solum (silty deposits) and 0 to 8 percent in the lower part of the solum and in the substratum.
The A or Ap horizon has 10YR hue, value of 2 to 4, and chroma of 0 to 3.
The Bs horizon has 10YR or 7.5YR hue, value of 4 or 5, and chroma of 3 or 4. The high chroma colors are similar to those of spodic horizons; however, they do not meet the chemical requirements for spodic horizons.
The E horizon has 10YR hue, value of 4 to 6, and chroma of 2 to 4. Mottles are few to many and faint to prominent.
Mylrea soils have E/B or B/E horizons or both. The E/B or B/E horizon has tongues of E material surrounding thin columnarlike upward extensions of the Bt horizon or wholly surrounding small isolated remnants of the Bt horizon. The tongues of E have 10YR hue, value of 4 to 6, and chroma of 2 to 4. The E/B or B/E horizons have few to many distinct or prominent mottles.
The Bt1 horizon and the Bt part of the B/E horizon have 10YR or 7.5YR hue, value of 4 or 5, and chroma of 4 to 6, but in some pedons the chroma is 2.
The 2Bt2 horizon has 2.5Y, 10YR, 7.5YR, or 5YR hue; value of 4 or 5; and chroma of 2 to 6. It is loamy sand, sandy loam, fine sandy loam, loam, or the gravelly analogues. The 2BC horizon has similar colors to the 2Bt2 horizon, but differs in a higher gravel content.
The 3C horizon has 2.5Y, 10YR, 7.5YR, or 5YR hue; value of 4 to 6; and chroma of 2 to 8. It consists of an accumulation of waste consisting of angular, coarse-grained fragments resulting from the granular disintegration of crystalline rocks (esp. granite). The pebble size and cobble size fragments crush to sand size material without much difficulty.
COMPETING SERIES: This is the Fullam series in the same family. Fullam soils formed in a dense glacial till and are slowly permeable in the lower part of the control section and substratum.
GEOGRAPHIC SETTINGS: These soils are on ground moraines underlain by bedrock. Slopes are along drainageways and in depressions and range from 0 to 6 percent. Mylrea soils formed in 15 to 36 inches of loess or other silty deposits and in the underlying glacial till and residuum (grus) weathered from granite. Grus is an accumulation of waste consisting of angular coarse-grained fragments resulting from granular disintegration of granite. Mean annual temperature ranges from 43 to 46 degrees F, and mean annual precipitation ranges from 28 to 32 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Marathon, Milladore, Moberg, and Sherry series. The well drained Marathon soils and the somewhat excessively drained Moberg soils occupy higher lying positions in the landscape and form a drainage sequence with the Mylrea soils. The somewhat poorly drained Milladore are in nearby similar landscape positions as the Mylrea. The poorly drained Sherry soils occupy drainageways adjacent to the Mylrea soils.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is slow to medium. Permeability is moderate in the solum and rapid or very rapid in the substratum.
USE AND VEGETATION: Many areas remain in woodland or wooded livestock pasture. Cleared areas are used mainly for pasture and for the production of forage, small grain, and some corn for silage. The native vegetation was mixed deciduous and coniferous forests of sugar maple, red maple, American basswood, northern red oak, yellow birch, white ash, quaking aspen, bigtooth aspen, paper birch, and American elm.
DISTRIBUTION AND EXTENT: Central Wisconsin, primarily in Marathon County. These soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Langlade County, Wisconsin, 1984.
REMARKS: Mylrea pedons show some evidence of clay movement, but laboratory data indicates insufficient increase in clay to constitute an argillic horizon.
The highly weathered granite (grus) has undergone extensive chemical and mechanical weathering and the granite pebble size and cobble size fragments crush to sand and silt size fragments. The pebble size fragments, in place, behave as gravel in-so-far as the bulk density, permeability, and available water are concerned. As a construction material the pebble size fragments crush to sand and silt size material. The logical UNIFIED classification is SM or SP. The pebble size fragments are not suitable for aggregate so it is not a probable source of sand or gravel.
Diagnostic horizons and features recognized in this pedon are: ochric epipedon - from the surface of the soil to a depth of 3 inches (A); albic horizon - from 9 to 12 inches (E); cambic horizon - from 12 to 38 inches (Bt1, 2Bt2, 2BC); although there are clay films in the upper parts of the B horizon, there is not at least 3 percent more clay in the B horizons than the eluvial horizon (E); other features - have mottles with chroma of 2 or less within 60 cm of the soil surface.