IDENTIFIERS

  • Current Taxon Name (Soil Name): DARWIN
  • OSD
  • Series Extent
  • User Site ID: 2006MO183055
  • User Pedon ID: 2006MO183055
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M0618355
  • NCSS Pedon Lab Data NASIS Record ID - 26253
  • Print Date: 11/11/2024

    • 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: 38.8341389
  • Std. Longitude: -90.1233056
  • Datum: WGS84
  • Township: T47N
  • Range: R8E
  • Section: 9
  • PLSS Details: 1,759 feet East and 902 feet South from the North West 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: John Horton, Keith Knelle, Dennis Meinert
  • Current Taxonomic Class: Fine, smectitic, mesic Fluvaquentic Vertic Endoaquolls
  • Current Taxon Kind: series
  • Pedon Type: map unit inclusion
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 55
  • 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
  • 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

    0—51

    0—208

    51—71

    —51—

    —208—

    —20—
    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

    —

    —

    125.9

    —

    281

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 15 centimeters (0.0 to 5.9 inches); very dark gray (10YR 3/1) broken face silty clay; moderate fine subangular blocky structure; firm; 3.0 very fine roots throughout and 3.0 fine roots throughout; 3.0 fine interstitial and 0.5 fine tubular pores; fragments; slight effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # MU008220; observed in push tube
    A—15 to 51 centimeters (5.9 to 20.1 inches); very dark gray (10YR 3/1) broken face silty clay; strong fine subangular blocky, and moderate medium prismatic structure; very firm; 3.0 very fine roots throughout and 3.0 fine roots throughout; 3.0 fine tubular pores; 1 percent faint very dark gray (10YR 3/1), moist, slickensides (pedogenic) on all faces of peds; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 5/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented gray (10YR 5/1), moist, iron depletions with clear boundaries in matrix; fragments; clear smooth boundary. Lab sample # MU008221; observed in push tube
    Bg—51 to 71 centimeters (20.1 to 28.0 inches); dark gray (2.5Y 4/1) broken face silty clay; strong fine subangular blocky, and moderate medium prismatic structure; very firm; 3.0 very fine roots throughout and 3.0 fine roots throughout; 0.5 fine interstitial and 0.5 fine tubular pores; 1 percent medium faint irregular noncoherent cemented brown (7.5YR 4/4), 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, by hcl, 1n; clear smooth boundary. Lab sample # MU008222; observed in push tube
    Cg1—71 to 117 centimeters (28.0 to 46.1 inches); 60 percent gray (5Y 5/1) broken face and 40 percent olive gray (5Y 4/2) broken face stratified silty clay; massive; very firm; 0.5 very fine roots throughout and 3.0 fine roots throughout; 0.5 very fine tubular and 0.5 fine tubular pores; 1 percent medium faint irregular noncoherent cemented dark brown (7.5YR 3/4), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented gray (5Y 5/1), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; clear smooth boundary. Lab sample # MU008223; observed in push tube
    Cg2—117 to 178 centimeters (46.1 to 70.1 inches); 60 percent gray (5Y 5/1) broken face and 40 percent olive gray (5Y 4/2) broken face stratified silty clay loam; massive; firm; 0.5 fine roots throughout; 0.5 fine pores; 1 percent medium faint irregular noncoherent cemented dark reddish brown (2.5YR 3/4), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 5/6), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # MU008224; observed in push tube
    Cg3—178 to 213 centimeters (70.1 to 83.9 inches); 60 percent gray (5Y 5/1) broken face and 40 percent olive gray (5Y 4/2) broken face stratified silty clay loam; massive; firm; 1 percent medium faint irregular noncoherent cemented strong brown (7.5YR 5/6), moist, iron depletions with clear boundaries in matrix and 1 percent medium faint irregular noncoherent cemented dark reddish brown (2.5YR 3/4), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n. Lab sample # MU008225; observed in push tube