LOCATION FANCHON MOEstablished Series
TAXONOMIC CLASS: Fine-loamy, siliceous, semiactive, mesic Typic Paleudults
TYPICAL PEDON: Fanchon silt loam on a 3 percent slope in a mixed hardwood forest at an elevation of 1,070 feet. (Colors are for moist soil unless otherwise stated)
Oi--0 to 1 inches; partially decomposed organic matter.
A--1 to 5 inches; brown (10YR 4/3) silt loam; moderate medium granular structure; very friable; many very fine and fine and few medium and coarse roots throughout; many fine irregular and tubular pores; 2 percent subangular mixed gravel; strongly acid (pH 5.1); abrupt smooth boundary. (2 to 8 inches thick)
AB--5 to 10 inches; 60 percent dark yellowish brown (10YR 4/4) and 40 percent yellowish brown (10YR 5/4) silt loam; weak fine subangular blocky structure; friable; common fine and few medium and coarse roots throughout; common fine tubular pores; few distinct brown (10YR 4/3) organic coats on faces of peds; 2 percent subangular mixed gravel; strongly acid (pH 5.1); clear smooth boundary. (0 to 8 inches thick)
Bt1--10 to 16 inches; yellowish brown (10YR 5/4) silt loam; weak medium subangular blocky structure parting to moderate fine subangular blocky; firm; common fine and few medium and coarse roots throughout; common fine tubular pores; few distinct dark yellowish brown (10YR 4/4) clay films on faces of peds; few distinct brown (10YR 4/3) organic coats in root channels and in pores; 5 percent subangular mixed gravel; strongly acid (pH 5.1); clear smooth boundary.
Bt2--16 to 21 inches; brown (7.5YR 5/4) silt loam; moderate medium angular blocky structure parting to moderate fine angular blocky; firm; few medium roots throughout; few fine and medium tubular pores; few distinct yellowish red (5YR 4/6) clay films on faces of peds and few distinct brown (7.5YR 5/4) clay films throughout; 5 percent subangular mixed gravel and 2 percent subangular sandstone stones; very strongly acid (pH 5.0); clear smooth boundary. (Combined thickness of the Bt horizon is 8 to 20 inches)
2Bt3--21 to 28 inches; strong brown (7.5YR 5/6) very gravelly loam; moderate fine angular blocky structure; firm; few fine roots throughout; common very fine and fine tubular pores; few distinct strong brown (7.5YR 5/6) clay films on faces of peds; few distinct brown (10YR 5/3) silt coats between sand grains; 40 percent subangular mixed gravel and 5 percent angular sandstone flagstones; strongly acid (pH 5.1); clear wavy boundary.
2Bt4--28 to 39 inches; 60 percent red (2.5YR 4/8) and 40 percent brown (7.5YR 5/4) gravelly clay loam; moderate fine subangular blocky structure; firm; common very fine and fine irregular and tubular pores; few distinct red (2.5YR 4/6) and common distinct brown (7.5YR 4/4) clay films on faces of peds; common distinct pale brown (10YR 6/3) silt coats between sand grains; 25 percent subangular chert gravel; strongly acid (pH 5.2); clear wavy boundary.
2Bt5--39 to 47 inches; red (10R 4/8) very gravelly clay loam; weak fine subangular blocky structure; firm; many very fine and fine irregular and tubular pores; common distinct brown (7.5YR 5/2) clay films on face of peds; common prominent brown (10YR 5/3) silt coats between sand grains; 50 percent subangular chert gravel; pockets of decomposing tripoli are present; strongly acid (pH 5.1); clear wavy boundary. (Combined thickness of the 2Bt horizon is 20 or more inches)
3Bt6--47 to 80 inches; 80 percent red (10R 4/8) and 20 percent yellowish red (5YR 5/6) clay; moderate very fine angular and subangular blocky structure; very firm; few fine irregular and tubular pores; common prominent reddish brown (2.5YR 4/4) clay films on face of peds and few prominent brown (7.5YR 4/3) clay films in root channels and pores; few distinct yellowish brown (10YR 5/4) silt coats in root channels and in pores; 5 percent subangular mixed gravel; very strongly acid (pH 5.0). (Combined thickness of the 3Bt horizon is 20 or more inches)
TYPE LOCATION: Howell County Missouri; about 3 miles south of South Fork; 1,200 feet south and 1,200 west of the north east corner of section 8, T. 22 N., R. 9 W; Moody, Missouri USGS quadrangle, UTM Zone 15, Easting 593360m, Northing 4049850m.
RANGE IN CHARACTERISTICS: Solum thickness is more than 80 inches. The particle size control section averages 10 to 30 percent sand and 20 to 35 percent clay
A or Ap horizon
Rock fragments: 0 to 25 percent gravel
Hue: 10YR
Value: 4 or 5
Chroma: 2 to 4
Fine earth: silt loam, loam
Reaction: slightly acid to very strongly acid
AB or BA horizon
Rock fragments: 0 to 20 percent gravel
Hue: 10YR or 7.5YR
Value: 4 to 6
Chroma: 3 to 6
Fine earth: silt loam, loam
Reaction: slightly acid to very strongly acid
Bt horizon
Rock fragments: 0 to 35 percent gravel, 0 to 5 percent stones or cobbles
Hue: 10YR or 7.5YR
Value: 4 to 6
Chroma: 4 or 6
Fine earth: silt loam, loam, silty clay loam, clay loam
Reaction: slightly acid to very strongly acid
2Bt horizon
Rock fragments: 10 to 50 percent gravel, 0 to 20 percent stones, flagstones or cobbles
Hue: 7.5YR to 2.5YR
Value: 4 or 5
Chroma: 4 to 8
Fine earth: silt loam, loam, silty clay loam, clay loam
Reaction: slightly acid to very strongly acid
3Bt horizon
Rock fragments: 0 to 60 percent gravel, 0 to 20 percent stones, flagstones or cobbles
Hue: 10YR to 10R
Value: 3 to 7
Chroma: 4 to 8
Fine earth: clay, silty clay
Reaction: moderately acid to very strongly acid
COMPETING SERIES: These are the Cottonbend, Egyptgrove, McClung, Nolichucky, Taterhill, Topazmill, Trimble, and Wyrick series. Cottonbend, McClung, and Trimble soils do not have a lithologic discontinuity. Egyptgrove soils have a Btd horizon. Nolichucky soils have more sand in the particle size control section. Taterhill soils do not have a 3Bt horizon. Topazmill soils have more than 30 percent sand in the particle size control section. Wyrick soils typically have more rock fragments in the 2Bt horizon.
GEOGRAPHIC SETTING: Fanchon soils are on ridge tops and shoulder slopes. Slopes range from 1 to 8 percent. These soils formed in silty sediments derived mainly from loess and the underlying colluvium and residuum derived from sedimentary rocks. Elevations are commonly 900 to 1,200 feet. Mean annual temperature ranges from 54 to 58 degrees F., and the mean annual precipitation varies from 40 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Alred, Bendavis, Poynor, Scholten and Tonti soils. Alred and Poynor soils have a loamy-skeletal over clayey particle-size class and are on side slopes. Bendavis soils are moderately deep and on sides slopes. Scholten and Tonti soils have fragipans. Scholten soils are skeletal and on shoulder slopes. Tonti soils are adjacent to Fanchon soils on ridge tops.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is low to medium. Permeability is moderate, and the saturated hydraulic conductivity is moderately high.
USE AND VEGETATION: These soils are used mainly for pasture and timber. Native vegetation is mixed hardwoods.
DISTRIBUTION AND EXTENT: The Ozarks Highland region (MLRA 116A) of Missouri and possibly Arkansas. This series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia.
SERIES ESTABLISHED: Ozark County, Missouri soil survey; 2003.
REMARKS: Diagnostic horizons and features in this pedon are:
1) Ochric epipedon - the zone from the surface to a depth of 5 inches (A horizon).
2) Argillic horizon - the zone from 9 to 80 inches (Bt, 2Bt and 3Bt horizons).
ADDITIONAL DATA: This soil is being mapped predominantly in the Jefferson City formation (Ordivician age) in Missouri.
Fanchon soils were previously included in the Tonti series in mapping.
University of Missouri Soil Characterization Lab number S96MO09123.