LOCATION FAUNCE MNEstablished Series
TAXONOMIC CLASS: Mixed, frigid Lamellic Udipsamments
TYPICAL PEDON: Faunce fine sand on a 2 percent convex slope under red pine. (Colors are for moist soil unless otherwise noted.)
A--0 to 3 inches; very dark grayish brown (10YR 3/2) fine sand; light brownish gray (10YR 6/2) dry; weak fine granular structure; very friable; strongly acid; clear smooth boundary. (1 to 6 inches thick)
E1--3 to 11 inches; yellowish brown (10YR 5/4) fine sand; single grain; loose; moderately acid; clear smooth boundary.
E2--11 to 14 inches; strong brown (7.5YR 5/6) sand; single grain; loose; moderately acid; abrupt smooth boundary. (Combined thickness of E horizons is 5 to 20 inches.)
E&Bt--14 to 20 inches; yellowish brown (10YR 5/4) sand (E); single grain; loose; thin (2 to 3 inches irregular and discontinuous) band of dark yellowish brown (10YR 3/6) gravelly loamy coarse sand (Bt); weak medium subangular blocky structure; about 18 percent gravel; neutral; abrupt smooth boundary. (6 to 17 inches thick)
C1--20 to 28 inches; light yellowish brown (10YR 6/4) gravelly sand; single grain; loose; about 30 percent gravel; slight effervescence; slightly alkaline; gradual wavy boundary.
C2--28 to 35 inches; very pale brown (10YR 7/3) sand; single grain; loose; about 2 percent gravel; slight effervescence; slightly alkaline; clear smooth boundary.
C3--35 to 60 inches; pale brown (10YR 6/3) gravelly sand; single grain; loose; about 30 percent gravel; slight effervescence; slightly alkaline.
TYPE LOCATION: Lake of the Woods County, Minnesota; about 4 miles south and 1 mile east of Roosevelt; 2100 feet west and 2100 feet south of the northeast corner of section 32, T. 161 N., R. 34 W.
RANGE IN CHARACTERISTICS: Solum thickness and depth to free calcium carbonate range from 11 to 35 inches. The rock fragment content ranges from 0 to 15 percent in the A and E horizons. The rock fragment content in the control section averages between 10 and 35 percent, but some subhorizons have less than 10 percent. Rock fragments are commonly mixed in lithology and are mostly less than 3 inches in diameter.
The A horizon has hue of value of 3 or 4 and chroma of 1 to 3. The E horizon has hue of 10YR or 7.5YR, value of 4 to 6, and chroma of 3 to 6. The A and E horizons are loamy fine sand, loamy sand, fine sand, or sand. They are strongly acid to slightly acid. Some pedons have a thin O horizon.
The Bt horizon consists of one or more thin (combined thickness less than 3 inches) bands with hue of 10YR or 7.5YR, value of 3 to 5, and chroma of 4 to 6. It is sandy loam, loamy sand, coarse sandy loam, loamy coarse sand, sandy clay loam, or their gravelly analogues. It is neutral or slightly acid. It commonly has 2 to 4 times as much clay as the adjacent E material.
The C horizon has value of 5 to 7, and chroma of 3 or 4. Some pedons have 2 chroma below 40 inches. It is sand, coarse sand, fine sand, or their gravelly analogues. It is slightly alkaline or moderately alkaline. It is neutral in upper part of some pedons.
COMPETING SERIES: These are the Graycalm and Zimmerman series. The Graycalm and Zimmerman soils do not have free carbonates above a depth of 40 inches. In addition, the Graycalm series has less than 15 percent rock fragments in the control section and the Zimmerman series does not have rock fragments in the control section.
GEOGRAPHIC SETTING: Faunce soils have plane to convex slopes of 0 to 25 percent on glacial lake plains, outwash plains, and moraines. They formed in stratified sandy and gravelly sediments of late Wisconsinan Age. Mean annual air temperature ranges from 37 to 42 degrees F. Mean annual precipitation ranges from 20 to 24 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Andrusia, Corliss, Hiwood, Redby, Sugarbush, and Cormant soils. Andrusia and Sugarbush soils have argillic horizons more than 6 inches thick. The Hiwood and Redby soils do not have rock fragments and occupy slightly lower positions. Corliss soils do not have lamellae that meet the requirements for an argillic horizon except thickness. Cormant soils occupy low lying beaches and depressions.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is slow to medium. Permeability is rapid.
USE AND VEGETATION: This soil is used for cropland or is forested. Main tree species are red pine and jack pine. Corn and hay are the most common grown in crops.
DISTRIBUTION AND EXTENT: Northern and Central Minnesota, primarily the glacial Lake Agassiz plain. Moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Lake of the Woods County, Minnesota, 1989.
REMARKS: This soil is not prime farmland due to the low available water capacity in the root zone.
Diagnostic horizons and features recognized in this pedon are: ochric epipedon - zone from the surface to 14 inches (A, E1, and E2 horizons); alfic subgroup - lamellae in zone from l4 to 20 inches (E&Bt horizon); udic moisture regime. This soil was formerly placed in the Alfic Udipsamments subgroup.