IDENTIFIERS

  • Current Taxon Name (Soil Name): Gravois
  • OSD
  • Series Extent
  • User Site ID: 1996MO221045M
  • User Pedon ID: 1996MO221045
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M9622118
  • Print Date: 3/2/2025

    • 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: 37.8607857
  • Std. Longitude: -90.9889514
  • Datum: WGS84
  • Location Description: Mark Twain Nat. Forest
  • State: Missouri
  • County: MO221—Washington
  • MLRA: 116A—Ozark Highland

    • PEDON

  • Describers Name: S.L.,MAC,DS,GL
  • Current Taxonomic Class: Fine-silty, mixed Aquic Paleudalfs
  • Pedon Type: within range of map unit
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Sampled As Information:
  • Soil Name - Gravois
  • Taxonomic Class - Fine-silty, mixed Aquic Paleudalfs
  • Taxon Kind - series
  • PSC - 20 to cm.
  • Classificaton Date - 11/6/1996
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: loess and/or residuum
  • Landscape: hills
  • Landform: ridge
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/6/1996 (actual site observation date)
  • Air Photo ID: 23
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • 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

    4

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    331

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    A—0 to 10 centimeters (0.0 to 3.9 inches); brown (10YR 5/3), pale brown (10YR 6/3), dry; silt loam; moderate very fine granular structure; very friable; 6.0 very fine and fine roots; 20.0 very fine and fine interstitial and tubular pores; fragments; extremely acid, pH 4.4, hellige-truog; clear smooth boundary. Lab sample # MU056634
    Bt1—10 to 20 centimeters (3.9 to 7.9 inches); yellowish brown (10YR 5/6) silt loam; weak medium subangular blocky structure; very friable; 6.0 very fine and fine roots; 25.0 very fine and fine interstitial and tubular pores; 4 percent distinct clay films on faces of peds; fragments; very strongly acid, pH 4.5, hellige-truog; clear smooth boundary. Lab sample # MU056635
    Bt2—20 to 38 centimeters (7.9 to 15.0 inches); strong brown (7.5YR 4/6) silty clay loam; moderate medium subangular blocky structure; friable; 3.0 very fine and fine roots; 15.0 fine and medium interstitial and tubular pores; 15 percent distinct clay films on faces of peds; fragments; very strongly acid, pH 4.7, hellige-truog; clear smooth boundary. Lab sample # MU056636
    Bt3—38 to 56 centimeters (15.0 to 22.0 inches); yellowish brown (10YR 5/6) silty clay loam; weak fine prismatic parts to moderate medium subangular blocky structure; friable; 3.0 very fine and fine roots; 15.0 fine and medium interstitial and tubular pores; 35 percent distinct clay films on faces of peds; fragments; very strongly acid, pH 4.5, hellige-truog; clear smooth boundary. Lab sample # MU056637
    Bt4—56 to 66 centimeters (22.0 to 26.0 inches); 60 percent light yellowish brown (10YR 6/4) and 10 percent brownish yellow (10YR 6/8) silty clay loam; 30 percent grayish brown (10YR 5/2) medium mottles; moderate fine subangular blocky structure; firm; 5.0 fine and medium roots; 15.0 very fine and fine interstitial and tubular pores; 15 percent distinct clay films on faces of peds; 1 percent by volume 2-39-75 millimeter limestone, cherty fragments; very strongly acid, pH 4.5, hellige-truog; clear wavy boundary. Lab sample # MU056638
    2Btx—66 to 91 centimeters (26.0 to 35.8 inches); 50 percent dark yellowish brown (10YR 4/4) and 20 percent brown (7.5YR 4/3) gravelly silt loam; 30 percent light brownish gray (10YR 6/2) medium mottles; weak coarse prismatic parts to weak fine subangular blocky structure; very firm; 5.0 very fine and fine interstitial pores; 15 percent distinct clay films on faces of peds; 15 percent by volume 2-39-75 millimeter limestone, cherty fragments; extremely acid, pH 4.4, hellige-truog; clear wavy boundary. Lab sample # MU056639
    3Bt5—91 to 122 centimeters (35.8 to 48.0 inches); 90 percent red (2.5YR 4/6) and 10 percent reddish yellow (7.5YR 6/8) gravelly clay; 5 percent brown (7.5YR 5/2) fine mottles; strong medium prismatic parts to moderate very fine subangular blocky structure; very firm; 5.0 very fine and fine interstitial and tubular pores; 60 percent distinct clay films on faces of peds; 20 percent by volume 2-39-75 millimeter limestone, cherty fragments; extremely acid, pH 4.3, hellige-truog; gradual wavy boundary. Lab sample # MU056640
    3Bt6—122 to 165 centimeters (48.0 to 65.0 inches); 80 percent dark red (2.5YR 3/6) and 20 percent brown (7.5YR 4/4) gravelly clay; 5 percent grayish brown (10YR 5/2) fine mottles; moderate medium prismatic parts to moderate very fine subangular blocky structure; very firm; 5.0 very fine and fine interstitial and tubular pores; 60 percent distinct clay films on faces of peds; 20 percent by volume 2-39-75 millimeter limestone, cherty fragments; extremely acid, pH 4.2, hellige-truog. Lab sample # MU056641