IDENTIFIERS

  • Current Taxon Name (Soil Name): Cornwall
  • OSD
  • Series Extent
  • User Site ID: 1999MO203022M
  • User Pedon ID: 1999MO203022M
  • User Site Association ID: 8560
  • Transect:
  • Transect Stop Number - 9
  • Transect Interval - 200.0
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M9961322
  • NCSS Pedon Lab Data NASIS Record ID - 31541
  • User Project ID: 2021-25NCSPR013
  • Project Name: MLRA 116A - Mark Twain National Forest Update
  • Print Date: 2/17/2025

    • LOCATION

  • Location In Web Soil Survey
  • AOI is roughly a square mile and pedon is marked in the center.
  • Location in SoilWeb
  • Location in Google Maps
  • Std. Latitude: 36.9234500
  • Std. Longitude: -91.5022806
  • Datum: WGS84
  • Map Unit: 74642—Cornwall silt loam, rarely ponded, 0 to 3 percent slopes
  • State: Missouri
  • County: MO203—Shannon
  • MLRA: 116A—Ozark Highland
  • MLRA Soil Survey Area: NC-SPM—Springfield, Missouri
  • Non-MLRA Soil Survey Area: MO203—Shannon County, Missouri
  • 7.5 Minute USGS Quad: 36091-H5—Montier, Missouri

    • PEDON

  • Describers Name: LT DC SE BM
  • Current Taxonomic Class: Fine-silty, mixed, active, mesic Fragiaquic Paleudults
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Cornwall
  • PSC - 25 to 75 cm.
  • Classificaton Date - 6/5/2023
  • Classifier - Campbell and Meinert
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - udic
  • Moisture Subclass - aquic
  • Sampled As Information:
  • Soil Name - Cornwall
  • Taxonomic Class - Fine-silty, mixed, active, mesic Fragiaquic Paleudults
  • Taxon Kind - series
  • PSC - 25 to 75 cm.
  • Classificaton Date - 2/18/1999
  • Soil Taxonomic Edition - twelfth edition
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • Field Measured Properties: 22 percent of pscs clay and 7.9 percent of pscs sand and 0 percent of pscs gravel and 0.45 ratio of cec to clay ratio


    • SITE

  • Parent Material: slope alluvium over pedisediment over slope alluvium
  • Landscape: karstland
  • Landform: sinkhole
  • Hill Slope Profile: toeslope
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 2/18/1999 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    umbric epipedon

    argillic horizon

    redox depletions with chroma 2 or less

    lithologic discontinuity

    fragic soil properties

    aquic conditions

    lithologic discontinuity

    0—25

    25—208

    66—208

    84—122

    84—122

    102—122

    122—208

    —25—

    —183—

    —142—

    —38—

    —38—

    —-

    —86—
    Setting and Climate
    Slope Slope Length USLE Upslope Length Elev. Corr. Elev Aspect MAP REAP FFD MAAT MSAT MWAT MAST MSST MWST MFFP PE Index Climate Station ID Climate Station Name Climate Station Type
    % m degrees mm mm C mm

    2

    —

    —

    299

    —

    243

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A1—0 to 10 centimeters (0.0 to 3.9 inches); dark brown (10YR 3/3) silt loam; moderate fine granular structure; very friable; 7.0 fine and medium roots and 3.0 coarse roots; 7.0 fine interstitial and tubular pores; fragments; clear smooth boundary. Lab sample # MU063790
    A2—10 to 25 centimeters (3.9 to 9.8 inches); dark brown (7.5YR 3/3) silt loam; weak fine subangular blocky structure; friable; 7.0 fine to coarse roots; 7.0 fine tubular pores; 1 percent spherical black (N 2/0) iron-manganese masses; fragments; clear smooth boundary. Lab sample # MU063791
    Bt1—25 to 48 centimeters (9.8 to 18.9 inches); yellowish brown (10YR 5/4) silt loam; weak fine subangular blocky structure; friable; 3.0 fine and medium roots; 7.0 fine and medium tubular pores; 3 percent distinct dark grayish brown (10YR 4/2) organic stains on faces of peds and 25 percent distinct dark yellowish brown (10YR 4/4) clay films on faces of peds; 1 percent spherical black (N 2/0) iron-manganese masses; fragments; clear smooth boundary. Lab sample # MU063792
    Bt2—48 to 66 centimeters (18.9 to 26.0 inches); yellowish brown (10YR 5/4) silt loam; moderate fine subangular blocky structure; friable; 3.0 fine and medium roots; 7.0 fine tubular pores; 20 percent distinct brown (7.5YR 4/4) clay films on faces of peds; 1 percent spherical black (N 2/0) iron-manganese masses; fragments; clear smooth boundary. Lab sample # MU063793
    Bt3—66 to 84 centimeters (26.0 to 33.1 inches); yellowish brown (10YR 5/4) silt loam; moderate medium subangular blocky structure; friable; 3.0 fine roots; 7.0 fine tubular pores; 1 percent distinct brown (7.5YR 4/4) clay films on faces of peds and 2 percent distinct light brownish gray (10YR 6/2) silt coats on faces of peds and 5 percent distinct dark yellowish brown (10YR 4/4) clay films on faces of peds; 2 percent spherical black (N 2/0) iron-manganese masses; fragments; clear smooth boundary. Lab sample # MU063794
    2Btx—84 to 102 centimeters (33.1 to 40.2 inches); light olive brown (2.5Y 5/4) silt loam; weak fine subangular blocky structure; friable; brittle; 0.9 fine roots; 7.0 fine interstitial and tubular pores; 25 percent distinct yellowish brown (10YR 5/4) clay films on faces of peds and 40 percent distinct gray (10YR 6/1) silt coats on faces of peds; 1 percent fine spherical black (N 2/0) iron-manganese masses and 15 percent irregular strong brown (7.5YR 5/8) masses of oxidized iron; 1 percent by volume nonflat indurated 2-40-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU063795
    2Btxg—102 to 122 centimeters (40.2 to 48.0 inches); grayish brown (10YR 5/2) silty clay loam; moderate medium subangular blocky structure; very firm; brittle; 0.9 fine interstitial and tubular pores; 5 percent distinct yellowish brown (10YR 5/4) clay films on faces of peds and 10 percent distinct gray (10YR 6/1) clay films on faces of peds; 2 percent spherical black (N 2/0) iron-manganese masses and 40 percent fine irregular strong brown (7.5YR 5/8) masses of oxidized iron; 5 percent by volume nonflat indurated 2-40-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU063796
    3Bt1—122 to 152 centimeters (48.0 to 59.8 inches); yellowish brown (10YR 5/4) silt loam; weak fine platy parts to moderate fine subangular blocky structure; firm; 3.0 fine and medium interstitial and tubular pores; 15 percent distinct dark yellowish brown (10YR 4/4) clay films on faces of peds and 15 percent distinct light brownish gray (10YR 6/2) silt coats on faces of peds and 20 percent distinct dark grayish brown (10YR 4/2) clay films on faces of peds; fine irregular red (2.5YR 5/8) masses of oxidized iron; 5 percent by volume nonflat indurated 2-40-75 millimeter chert fragments; gradual wavy boundary. Lab sample # MU063797
    3Bt2—152 to 183 centimeters (59.8 to 72.0 inches); yellowish brown (10YR 5/6) silt loam; moderate medium subangular blocky structure; firm; 0.9 fine roots in cracks; 7.0 fine and medium interstitial and tubular pores; 5 percent distinct brown (7.5YR 4/4) clay films on faces of peds and 15 percent distinct pinkish gray (7.5YR 7/2) silt coats on faces of peds and 25 percent distinct very dark gray (10YR 3/1) clay films on faces of peds; 1 percent fine spherical black (N 2/0) iron-manganese masses and 5 percent fine irregular yellowish red (5YR 4/6) masses of oxidized iron and 15 percent coarse gray (N 6/0) clay depletions and 15 percent coarse black (N 2/0) clay depletions; 5 percent by volume nonflat indurated 2-40-75 millimeter chert fragments; gradual smooth boundary. Lab sample # MU063798
    3Bt3—183 to 208 centimeters (72.0 to 81.9 inches); 55 percent red (2.5YR 4/6) and 45 percent brown (7.5YR 5/4) silty clay loam; moderate medium subangular blocky structure; firm; 3.0 fine tubular pores; 5 percent distinct reddish brown (5YR 4/3) clay films on faces of peds and 5 percent distinct dark brown (7.5YR 3/2) clay films on faces of peds and 5 percent distinct pinkish gray (7.5YR 6/2) silt coats on faces of peds and 15 percent distinct reddish brown (5YR 4/4) clay films on faces of peds; 1 percent fine irregular yellowish brown (10YR 5/8) masses of oxidized iron; fragments; very strongly acid, pH 4.7, hellige-truog. Lab sample # MU063799