IDENTIFIERS

  • Current Taxon Name (Soil Name): DARWIN
  • OSD
  • Series Extent
  • User Site ID: 2006MO183052
  • User Pedon ID: 2006MO183052
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M0618352
  • NCSS Pedon Lab Data NASIS Record ID - 26252
  • Print Date: 9/23/2024

    • 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: 38.8251389
  • Std. Longitude: -90.1219444
  • Datum: WGS84
  • Township: T47N
  • Range: R8E
  • Section: 9
  • PLSS Details: 803 feet West and 2,681 feet North from the South East corner
  • Country: US—United States
  • State: Missouri
  • County: MO183—St. Charles
  • MLRA: 115—Central Mississippi Valley Wooded Slopes
  • Non-MLRA Soil Survey Area: MO183—St. Charles County, Missouri
  • 7.5 Minute USGS Quad: 38090-G1—Wood River, Illinois

    • PEDON

  • Describers Name: Keith Knelle, John Horton
  • Current Taxonomic Class: Fine, smectitic, mesic Fluvaquentic Vertic Endoaquolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: map unit inclusion
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 52
  • Correlated Information:
  • Soil Name - DARWIN
  • PSC - 25 to 102 cm.
  • Classificaton Date - 2/1/2012
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - aquic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - WALDRON
  • Classificaton Date - 9/6/2006
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Holocene Stage clayey alluvium derived from mixed over Holocene Stage silty alluvium derived from mixed
  • Landscape: river valley
  • Landform: flood-plain step
  • Geomorphic Component Terraces: tread
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: negligible
  • Drainage Class: poorly
  • Flooding: occasional flooding for brief periods
  • Ponding: occasional ponding for brief periods
  • Geology: Holocene Stage formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/6/2006 (actual site observation date)
  • Air Photo ID: 38090g1nw
  • Surface Water Kind: flooded
  • Surface Water Depth: 15
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion gully
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    mollic epipedon

    aquic conditions

    cambic horizon

    slickensides

    0—25

    23—226

    25—168

    137—168

    —25—

    —203—

    —143—

    —31—
    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

    0.5

    —

    —

    125

    —

    63

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 25 centimeters (0.0 to 9.8 inches); very dark gray (10YR 3/1) broken face clay loam; moderate fine and medium subangular blocky structure; firm; 3.0 very fine roots throughout and 3.0 fine roots throughout; 3.0 fine interstitial pores; fragments; slight effervescence, by hcl, 1n; clear smooth boundary. Lab sample # MU008213; observed in push tube
    Bg1—25 to 51 centimeters (9.8 to 20.1 inches); gray (10YR 5/1) broken face silty clay loam; moderate fine and medium subangular blocky structure; very firm; 3.0 fine roots throughout; 0.5 fine tubular and 3.0 fine interstitial pores; 35 percent faint very dark gray (10YR 3/1), moist, organoargillans on all faces of peds; 1 percent medium faint irregular noncoherent cemented yellowish brown (10YR 5/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented dark gray (10YR 4/1), moist, iron depletions with clear boundaries in matrix; fragments; clear smooth boundary.; observed in push tube
    Bg2—51 to 89 centimeters (20.1 to 35.0 inches); dark gray (5Y 4/1) broken face clay; moderate medium angular blocky structure; very firm; 0.5 very fine roots throughout and 0.5 fine roots throughout; 3.0 very fine tubular and 3.0 fine tubular pores; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 5/8), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; gradual smooth boundary.; observed in push tube
    Bg3—89 to 137 centimeters (35.0 to 53.9 inches); dark gray (5Y 4/1) broken face silty clay; moderate medium subangular blocky structure; firm; 0.5 very fine roots throughout; 3.0 very fine tubular and 3.0 fine tubular pores; 35 percent distinct gray (10YR 6/1), moist, silt coats on all faces of peds; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 5/8), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; gradual smooth boundary.; observed in push tube
    Bg4—137 to 168 centimeters (53.9 to 66.1 inches); dark gray (2.5Y 4/1) broken face clay; moderate medium angular blocky structure; very firm; 0.5 fine tubular pores; 12 percent distinct dark gray (2.5Y 4/1), moist, slickensides (pedogenic) on all faces of peds; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented yellowish red (5YR 4/6), moist, iron depletions with clear boundaries in matrix; fragments; very slight effervescence, by hcl, 1n; abrupt smooth boundary.; observed in push tube
    2Cg1—168 to 193 centimeters (66.1 to 76.0 inches); 80 percent gray (10YR 5/1) broken face and 20 percent dark grayish brown (10YR 4/2) broken face stratified silt loam; massive; firm; 0.5 fine tubular pores; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented gray (2.5Y 5/1), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; clear smooth boundary.; observed in push tube
    2Cg2—193 to 226 centimeters (76.0 to 89.0 inches); dark gray (2.5Y 4/1) broken face stratified silty clay loam; massive; firm; 0.5 fine tubular pores; 1 percent medium faint irregular noncoherent cemented dark reddish brown (5YR 3/3), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 4/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented gray (2.5Y 5/1), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n.; observed in push tube