LOCATION MCGINN MI

Established Series
Rev. TEW-WEF-MLK
08/2012

MCGINN SERIES

The McGinn series consists of very deep, well drained soils formed in sandy deposits and in loamy till on ground moraines. Slope ranges from 0 to 50 percent. Mean annual precipitation is about 762 mm (30 inches), and the mean annual temperature is about 7.2 degrees C (45 degrees F).

TAXONOMIC CLASS: Coarse-loamy, mixed, semiactive, frigid Haplic Glossudalfs

TYPICAL PEDON: McGinn loamy sand, on a 9 percent slope in a wooded area. (Colors are for moist soil unless otherwise stated.)

Oi--0 to 2.5 cm (1 inch); black (5YR 2.5/1) partially decomposed forest litter; strongly acid; abrupt smooth boundary. [0 to 5 cm (2 inches) thick]

A--2.5 to 5 cm (1 to 2 inches); black (N 2.5/) loamy sand, very dark gray (N 3/) dry; weak medium granular structure; friable; many fine roots; about 3 percent gravel and 1 percent cobbles; very strongly acid; abrupt broken boundary. [2.5 to 8 cm (1 to 3 inches) thick]

E--5 to 10 cm (2 to 4 inches); light brownish gray (10YR 6/2) loamy sand; weak fine subangular blocky structure; friable; common fine roots; about 3 percent gravel and 1 percent cobbles; very strongly acid; abrupt broken boundary. [0 to 10 cm (4 inches) thick]

Bw1--10 to 15 cm (4 to 6 inches); strong brown (7.5YR 4/6) loamy sand; weak medium subangular blocky structure; friable; many fine and few medium roots; about 3 percent gravel and 1 percent cobbles; strongly acid; clear wavy boundary.

Bw2--15 to 41 cm (6 to 16 inches); dark yellowish brown (10YR 4/4) loamy sand; moderate coarse subangular structure; friable; common medium roots; about 3 percent gravel and 1 percent cobbles; about 10 percent of matrix is slightly brittle; strongly acid; abrupt wavy boundary. [Combined thickness of the Bw horizon is 25 to 46 cm (10 to 18 inches).]

E'--41 to 46 cm (16 to 18 inches); grayish brown (10YR 5/2) loamy sand; weak thick platy structure; slightly brittle; about 3 percent gravel and 1 percent cobbles; moderately acid; abrupt broken boundary. [0 to 10 cm (4 inches) thick]

E/B--46 to 53 cm (18 to 21 inches); grayish brown (10YR 5/2) loamy sand (E'); weak thick platy structure; occupies about 75 percent of the horizon surrounding peds of reddish brown (5YR 4/4) sandy loam (Bt); weak medium subangular blocky structure; slightly brittle; few medium roots; many very fine vesicular pores; few faint reddish brown (5YR 4/4) clay films on faces of peds; about 3 percent gravel and 1 percent cobbles; moderately acid; abrupt irregular boundary.

2B/E--53 to 64 cm (21 to 25 inches); reddish brown (5YR 4/4) sandy loam (Bt); many distinct dark reddish brown (5YR 3/4) clay films on faces of peds; occupies about 80 percent of the horizon surrounded and coated by grayish brown (10YR 5/2) loamy sand (E'); moderate medium subangular blocky structure; friable; few fine roots; many very fine vesicular pores; about 3 percent gravel and 1 percent cobbles; moderately acid; abrupt irregular boundary.

2Bt--64 to 89 cm (25 to 35 inches); reddish brown (5YR 4/4) sandy loam; moderate medium subangular blocky structure; friable; common fine roots; many very fine vesicular pores; many distinct dark reddish brown (5YR 3/4) clay films on faces of peds; about 3 percent gravel and 1 percent cobbles; slightly acid; clear wavy boundary. [15 to 30 cm (6 to 12 inches) thick]

2C--89 to 203 cm (35 to 80 inches); light reddish brown (5YR 6/3) sandy loam; massive with weakly expressed thick platiness inherited from the parent material; friable; few fine roots in vertical fractures; few prominent very pale brown (10YR 8/2) carbonate coatings in vertical fractures; about 5 percent gravel and 1 percent cobbles; strongly effervescent; moderately alkaline.

TYPE LOCATION: Alcona County, Michigan; about 4 miles southwest of the village of Hubbard Lake; 150 feet south and 1,980 feet west of the northeast corner of sec. 23, T. 28 N., R. 6 E; USGS Hubbard Lake SW, MI topographic quadrangle; lat. 44 degrees 48 minutes 53.50 seconds N. and 83 degrees 40 minutes 19.78 seconds W., NAD 27.

RANGE IN CHARACTERISTICS:
Depth to the base of the argillic horizon: 61 to 102 cm (24 to 40 inches)
Depth to carbonates: 61 to 102 cm (24 to 40 inches)
Thickness of the sandy mantle: 36 to 50 cm (14 to 20 inches)
Sandy mantle above the argillic horizon (A, E, Bw, and E' horizons): contains less than 15 percent clay
Argillic horizon: ranges from 15 to 18 percent clay
Rock fragment content: 2 to 10 percent gravel and 0 to 5 percent cobbles; total rock fragment content ranges from 2 to 10 percent throughout the series control section

A horizon:
Hue: 10YR or is neutral
Value: 2, 2.5, or 3
Chroma: 0 or 1
Texture: loamy sand and contain less than 15 percent clay

Ap horizon, where present:
Hue: 10YR
Value: 4 or 5
Chroma: 2 or 3
Texture: loamy sand and contain less than 15 percent clay
Reaction: extremely acid to strongly acid

E horizon:
Hue: 7.5YR or 10YR
Value: 4 to 6
Chroma: 2
Texture: loamy sand and contain less than 15 percent clay
Reaction: very strongly acid or strongly acid

Bw horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 4 to 6; hue of 7.5YR and value and chroma of 4 do not occur together
Texture: loamy sand and contain less than 15 percent clay
Reaction: strongly acid

E' horizon and E part of the E/B and 2B/E horizons:
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 2
Texture: loamy sand and contain less than 15 percent clay
Reaction: very strongly acid to moderately acid

2Bt horizon and Bt part of the E/B and 2B/E horizons:
Hue: 5YR or 7.5YR
Value: 3 to 5
Chroma: 4
Texture: sandy loam or loam
Reaction: very strongly acid to slightly acid

2C horizon:
Hue: 5YR or 7.5YR
Value: 5 or 6
Chroma: 3 or 4
Texture: sandy loam
Reaction: slightly alkaline or moderately alkaline

COMPETING SERIES: There are no other series in the same family.

GEOGRAPHIC SETTING: McGinn soils are on ground moraines of Wisconsinan age. Slope ranges from 0 to 50 percent. The McGinn soils formed in sandy deposits and in loamy till. Where McGinn soils are in dissected landscapes, they occupy mid to upper convex slopes. Mean annual precipitation ranges from 711 to 813 mm (28 to 32 inches). Mean annual temperature ranges from 6.1 to 8.3 degrees C (43 to 47 degrees F).

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Klacking, Graycalm, Mancelona, and Chinwhisker soils. These soils occupy positions lower on the landscape than the McGinn soils and formed in stratified outwash or glaciolacustrine deposits.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained. Potential for surface runoff is negligible to high depending on slope gradient. Saturated hydraulic conductivity is moderately high. Permeability is moderate.

USE AND VEGETATION: Most of this soil is forested. Tree species are dominantly northern red oak, white oak, and bigtooth aspen. Red maple, paper birch, white ash, red pine and white pine occur to a small extent. Native vegetation is northern red oak and red pine.

DISTRIBUTION AND EXTENT: MLRA 94A in northeast quarter of the Lower Peninsula of Michigan. The series is of moderate extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: AMHERST, MASSACHUSETTS

SERIES ESTABLISHED: Alcona County, Michigan, 1991.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: from the surface to a depth of 10 cm (4 inches) (Oi, A, and E horizons).
Albic horizon: from a depth of 5 to 10 cm (2 to 4 inches) and from 41 to 46 cm (16 to 18 inches) (E and E' horizons).
Glossic horizon: from a depth of 46 to 64 cm (18 to 25 inches) (E/B and B/E horizons).
Argillic horizon: from a depth of 53 to 89 cm (21 to 35 inches) (Bt part of the B/E horizon and Bt horizon).

The McGinn soils were mapped as Emmet soils prior to 1988. They depart from the concept of Emmet soils by having a glossic horizon and by being more acid in the argillic horizon.

ADDITIONAL DATA: Soil Interpretation Record No.: MI0053.

National Cooperative Soil Survey
U.S.A.