LOCATION FLAGSPRING MOEstablished Series
TAXONOMIC CLASS: Fine, mixed, semiactive, mesic Typic Hapludults
TYPICAL PEDON: Flagspring extremely gravelly silt loam on a 7 percent slope in a forest at an elevation of 1,340 feet.
A--0 to 5 inches; brown (10YR 4/3) extremely gravelly silt loam; weak fine granular structure; very friable; many very fine and fine roots and common medium and coarse; many fine interstitial and tubular pores; 70 percent subrounded chert gravel; extremely acid; clear smooth boundary. (2 to 5 inches)
E--5 to 10 inches; pale brown (10YR 6/3) very gravelly silt loam; weak fine granular structure; very friable; many very fine and fine roots and common medium and coarse; many fine interstitial and tubular pores; 55 percent subrounded chert gravel; very strongly acid; clear smooth boundary. (0 to 10 inches)
Bt1--10 to 15 inches; strong brown (7.5YR 5/6) gravelly silt loam; weak very fine and fine subangular blocky structure; friable; many very fine and fine roots and common medium and coarse; common fine interstitial and tubular pores; few distinct continuous pale brown (10YR 6/3) silt coatings on faces of peds and very few faint patchy strong brown (7.5YR 5/6) clay films on faces of peds; few prominant patchy black (N 2/0) manganese or iron-manganese stains between peds; 20 percent subrounded chert gravel; very strongly acid; clear wavy boundary.
Bt2--15 to 22 inches; red (2.5YR 4/6) and yellowish red (5YR 5/6) very gravelly silty clay loam; moderate very fine subangular blocky structure; firm; many fine and medium roots and common very fine; common fine interstitial and tubular pores; few prominent discontinuous light yellowish brown (10YR 6/4) silt coatings on faces of peds and few distinct discontinuous red (2.5YR 4/6) clay films on faces of peds; few prominent patchy black (N 2/0) manganese or iron-manganese stains between peds; 40 percent subangular chert gravel; very strongly acid; clear wavy boundary. (combined thickness of the Bt horizons is 0 to 16 inches)
2Bt3--22 to 33 inches; 60 percent dark red (2.5YR 3/6) and 40 percent red (2.5YR 4/6) clay; moderate fine and medium subangular blocky structure; very firm; common fine and medium roots and common very fine; common very fine interstitial pores; common distinct continuous dark red (2.5YR 3/6) clay films on faces of peds; 5 percent subangular tripoli paragravel; very strongly acid; clear wavy boundary. (combined thickness of the 2Bt horizons is 8 to 40 inches)
3B/C1--33 to 63 inches; 60 percent dark red (2.5YR 3/6) and 35 percent red (2.5YR 4/6) paracobbly clay; moderate medium subangular blocky structure parting to moderate very fine and fine angular blocky; very firm; common fine and medium roots and common very fine; common very fine interstitial and tubular pores; few distinct patchy yellowish red (5YR 5/6) clay films on faces of peds and common distinct discontinuous dark red (2.5YR 3/6) clay films on faces of peds; 15 percent subangular tripoli paracobbles and 15 percent subangular tripoli paragravel; 5 percent lenses of brown (7.5YR 5/2) loam, massive, weathered tripoli; very strongly acid; gradual wavy boundary.
3B/C2--63 to 80 inches; 90 percent red (2.5YR 4/6) extremely paracobbly clay loam; moderate very fine subangular blocky structure; very firm; common fine roots; common very fine interstitial and tubular pores; common distinct discontinuous dark red (2.5YR 3/6) clay films on faces of peds; 20 percent subangular tripoli paragravel and 50 percent subangular tripoli paracobbles; 10 percent lenses of very pale brown (10YR 8/2) loam, massive, weathered tripoli; extremely acid. (combined thickness of the 3B/C horizons is 15 to 55 inches)
TYPE LOCATION: McDonald County Missouri; Flagspring State Forest; 1,500 feet east and 1,690 feet north of the southwest corner of section 9, T.22 N., R.29 W. UTM Zone 15S; UTM Easting: 403872; UTM Northing: 4055004 (NAD 27). Latitude 36 degrees 38 minutes 08 seconds N; Longitude 94 degrees 04 minutes 30 seconds W.
RANGE IN CHARACTERISTICS:
Solum Thickness: greater than 60 inches
Depth to Bedrock: greater than 60 inches
Note: In a few pedons solum thickness and bedrock ranges to 50 inches.
A or Ap horizon
Value: 3 or 4.
Chroma: 2 or 3.
Total rock fragments: 15 to 85 percent gravel, 0 to 5 percent cobbles.
Reaction: extremely acid or very strongly acid unless limed.
E or BE horizon
Value: 4 to 7.
Chroma: 3 or 4.
Total rock fragments: 15 to 85 percent gravel.
Reaction: very strongly acid unless limed.
Bt horizon
Hue: 10YR to 2.5YR.
Value: 4 to 6.
Chroma: 4 to 8.
Fine-earth: silt loam or silty clay loam.
Total rock fragments: 15 to 40 percent gravel, 0 to 25 percent paragravel.
2Bt horizon
Hue: 10R to 10YR.
Value: 3 to 6.
Chroma: 4 to 8.
Fine-earth: silty clay or clay.
Total rock fragments: 0 to 60 percent paragravel.
Reaction: very strongly acid or strongly acid.
3B/C or 3Bt horizon
Hue: 2.5YR to 10YR
Value: 3 to 7
Chroma: 3 to 8
Fine-earth: loam, clay loam, silty clay loam, clay
Total rock fragments: 15 to 85 percent paragravel, 0 to 50 percent paracobbles
Reaction: extremely acid or very strongly acid.
Note: Relic colors with chroma of 2 may be present.
Note: Clay decreases more than 20 percent (relative) from the maximum clay content within a depth of 60 inches from the mineral soil surface.
COMPETING SERIES: These are the Boden, Braddock, Buffstat, (T) Casville, Christian, Clifton, Clover, (T) Danripple, Groseclose, Howell, (T) Mount Rush, Muse, Rapidan, Sequola, (T) Spears Mountain, Totier, Unison, and (T) Yellowbottom series. Boden soils are 40 to 60 inches to a lithic contact. Braddock, Casville, Clifton, and Clover soils typically have mica flakes in the profile. Buffstat and Totier soils have a paralithic contact at 40 to 60 inches. Christian soils are formed in residuum of interbedded limestone, sandstone, siltstone, and shale and do not have parafragments. Danripple, Groseclose, Howell, and Yellowbottom soils have a solum less than 60 inches in depth. Mount Rush, Muse, Sequola, and Spears Mountian soils have a paralithic contact at 20 to 40 inches. Rapidan soils formed from greenstone conglomerate rock and do not have parafragments. Unison soils formed in crystalline rocks and do not have parafragments.
GEOGRAPHIC SETTING: Flagspring soils are on ridge tops on the Springfield Plain (MLRA 116B). Slopes are convex and range from 3 to 15 percent. These soils formed in colluvium from cherty limestone over residuum from limestone and tripoli of the Burlington/Keokuk formation (Mississippian age). The mean annual temperature ranges from 57 to 60 degrees F. The mean annual precipitation ranges from 38 to 48 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Clarksville, Noark, Rueter, Goss, Hailey and Jollymill soils. These soils have skeletal particle size classes. Clarksville and Noark soils are on lower ridge tops. Rueter, Goss, Hailey and Jollymill soils are on sideslopes.
DRAINAGE AND PERMEABILITY: Well drained, medium runoff, moderately slow permeability.
USE AND VEGETATION: Some of these areas are cleared and used for pasture and hay. The other areas are woodland. Native vegetation is mixed hardwoods and pine.
DISTRIBUTION AND EXTENT: The Springfield Plain region (MLRA 116B) of southwest Missouri. This series is of small extent, about 4,300 acres have been mapped to date.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: McDonald County, Missouri, 2004. The name is from the state forest where the typical pedon is located.
REMARKS: Soil temperature data collected from this site for over 5 years indicates that the temperature regime overlaps mesic and thermic. The series was classified as mesic in order to match the adjacent series in mapping.
Diagnostic horizons and features in this pedon are:
1) Ochric epipedon - the zone from 0 to 10 inches (A and E horizons).
2) Argillic horizon - the zone from 10 to 80 inches (Bt1, Bt2, 2Bt3, 3B/C1, and 3B/C2 horizons).
ADDITIONAL DATA: Pedon ID number 95MO119010. University of Missouri Soil Characterization Laboratory sample number M9511910.