IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksville
  • OSD
  • Series Extent
  • User Site ID: 1994MO203052M
  • User Pedon ID: 1994MO203052M
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - MCL
  • Lab Pedon # - M9461352
  • NCSS Pedon Lab Data NASIS Record ID - 25374
  • Print Date: 12/9/2025

    • 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: 37.1728028
  • Std. Longitude: -91.1391889
  • Datum: WGS84
  • Township: T29N
  • Range: R2W
  • Section: 14
  • PLSS Details: 1506 feet E and 808 feet N of the SW corner
  • Country: US—United States
  • State: Missouri
  • County: MO203—Shannon
  • MLRA: 116A—Ozark Highland
  • Non-MLRA Soil Survey Area: MO613—Shannon County, Missouri, North & West Parts
  • 7.5 Minute USGS Quad: 37091-B2—Powder Mill Ferry, Missouri

    • PEDON

  • Describers Name: Dick Henderson, Dennis Meinert, Keith Knelle
  • Current Taxonomic Class: Loamy-skeletal, siliceous, semiactive, mesic Typic Paleudults
  • Current Taxon Kind: series
  • Pedon Type: map unit inclusion
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 52
  • Correlated Information:
  • Soil Name - Clarksville
  • PSC - 30 to 80 cm.
  • Classificaton Date - 3/12/2020
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Coulstone
  • Taxonomic Class - Loamy-skeletal, siliceous, semiactive, mesic Typic Paleudults
  • Taxon Kind - series
  • PSC - 30 to 80 cm.
  • Classificaton Date - 7/28/1994
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - udic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 3


    • SITE

  • Parent Material: residuum and/or gravelly slope alluvium derived from mixed
  • Landscape: hills
  • Landform: hillslope
  • Geomorphic Component Hills: nose slope
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Gasconade Dolomite formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/28/1994 (actual site observation date)
  • Air Photo ID: 37091b2se
  • Surface Water Kind: none observed
  • 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
  • Site Erosion Accelerated: water erosion sheet
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    0—30

    30—137

    —30—

    —107—
    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

    23

    —

    —

    266.7

    —

    70

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 8 centimeters (0.0 to 3.1 inches); dark grayish brown (10YR 4/2) broken face extremely gravelly silt loam; moderate very fine granular structure; very friable; 3.0 very fine roots throughout and 3.0 fine roots throughout; 3.0 fine interstitial pores; 65 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU001840; observed in pit, small
    AE—8 to 15 centimeters (3.1 to 5.9 inches); light yellowish brown (10YR 6/4) broken face very gravelly silt loam; weak very fine subangular blocky structure; very friable; 0.5 medium roots throughout and 3.0 fine roots throughout and 0.5 coarse roots throughout; 0.5 fine tubular and 3.0 fine interstitial pores; 70 percent prominent dark grayish brown (10YR 4/2), moist, organic stains on all faces of peds; 50 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU001841; observed in pit, small
    BE—15 to 30 centimeters (5.9 to 11.8 inches); yellowish brown (10YR 5/4) broken face gravelly silt loam; weak fine subangular blocky structure; friable; 3.0 medium roots throughout and 3.0 fine roots throughout and 3.0 coarse roots throughout; 0.5 medium tubular and 3.0 fine tubular and 0.5 coarse tubular pores; 70 percent prominent dark grayish brown (10YR 4/2), moist, organic stains on all faces of peds and 70 percent distinct very pale brown (10YR 7/4), moist, silt coats on all faces of peds; 25 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU001842; observed in pit, small
    Bt1—30 to 46 centimeters (11.8 to 18.1 inches); light yellowish brown (10YR 6/4) broken face very gravelly silt loam; weak fine subangular blocky structure; friable; 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 0.5 medium tubular and 0.5 fine tubular and 0.5 coarse tubular pores; 12 percent faint yellowish brown (10YR 5/6), moist, clay films on all faces of peds and 12 percent faint pale brown (10YR 6/3), moist, silt coats on all faces of peds; 5 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter chert fragments and 40 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; gradual smooth boundary. Lab sample # MU001843; observed in pit, small
    Bt2—46 to 58 centimeters (18.1 to 22.8 inches); strong brown (7.5YR 5/6) broken face very gravelly silt loam; weak very fine and fine subangular blocky, and moderate medium subangular blocky structure; friable; 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 0.5 medium tubular and 3.0 fine tubular and 0.5 coarse tubular pores; 35 percent distinct yellowish red (5YR 5/6), moist, clay films on all faces of peds and 35 percent distinct pale brown (10YR 6/3), moist, silt coats on all faces of peds and 35 percent distinct very pale brown (10YR 7/3), moist, silt coats on all faces of peds; 20 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments and 25 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter chert fragments; gradual smooth boundary. Lab sample # MU001844; observed in pit, small
    Bt3—58 to 71 centimeters (22.8 to 28.0 inches); strong brown (7.5YR 5/6) broken face very gravelly silt loam; moderate very fine and fine subangular blocky structure; firm; 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 0.5 medium tubular and 0.5 fine tubular pores; 35 percent distinct brown (10YR 5/3), moist, silt coats on all faces of peds and 70 percent prominent red (2.5YR 4/6), moist, clay films on all faces of peds; 10 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter chert fragments and 45 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear wavy boundary. Lab sample # MU001845; observed in pit, small
    Bt4—71 to 81 centimeters (28.0 to 31.9 inches); yellowish red (5YR 4/6) broken face very gravelly clay loam; moderate fine and medium subangular blocky structure; firm; 0.5 medium roots throughout and 0.5 fine roots throughout; 0.5 medium tubular and 0.5 fine tubular pores; 12 percent distinct light gray (10YR 7/2), moist, silt coats on all faces of peds and 70 percent prominent red (2.5YR 4/6), moist, clay films on all faces of peds; 50 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear smooth boundary. Lab sample # MU001846; observed in pit, small
    Bt5—81 to 99 centimeters (31.9 to 39.0 inches); yellowish red (5YR 4/6) broken face very gravelly clay loam; weak medium subangular blocky, and weak medium angular blocky structure; firm; 0.5 medium roots throughout and 0.5 fine roots throughout; 0.5 medium tubular and 0.5 fine tubular pores; 70 percent prominent red (2.5YR 4/6), moist, clay films on all faces of peds; 55 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; clear wavy boundary. Lab sample # MU001847; observed in pit, small
    Bt6—99 to 117 centimeters (39.0 to 46.1 inches); yellowish red (5YR 5/6) broken face extremely gravelly clay loam; weak medium subangular blocky, and weak medium angular blocky, and weak medium platy structure; firm; 0.5 medium roots throughout and 0.5 fine roots throughout; 0.5 fine interstitial pores; 70 percent prominent red (2.5YR 4/6), moist, clay films; 5 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter chert fragments and 60 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments; gradual wavy boundary. Lab sample # MU001848; observed in pit, small
    Bt7—117 to 137 centimeters (46.1 to 53.9 inches); yellowish red (5YR 5/6) broken face extremely gravelly clay loam; weak medium subangular blocky, and weak medium angular blocky, and weak medium platy structure; firm; 0.5 fine roots throughout; 0.5 fine tubular pores; 70 percent distinct red (2.5YR 4/6), moist, clay films; 10 percent by volume nonflat subangular strongly coherent cemented 75-?-250 millimeter chert fragments and 60 percent by volume nonflat subangular strongly coherent cemented 2-?-75 millimeter chert fragments. Lab sample # MU001849; observed in pit, small