IDENTIFIERS

  • Current Taxon Name (Soil Name): TRELOAR
  • OSD
  • Series Extent
  • User Site ID: 2007MO189005
  • User Pedon ID: 2007MO189005
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - MCL
  • Lab Pedon # - M0718905
  • NCSS Pedon Lab Data NASIS Record ID - 26044
  • Print Date: 4/19/2025

    • 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: 38.8199167
  • Std. Longitude: -90.1573056
  • Datum: WGS84
  • PLSS Details: 7,530 feet East and 1,808 feet North from the South West corner of Survey 1958,
  • Country: US—United States
  • State: Missouri
  • County: MO189—St. Louis
  • MLRA: 115—Central Mississippi Valley Wooded Slopes
  • Non-MLRA Soil Survey Area: MO189—St. Louis County and St. Louis City, Missouri
  • 7.5 Minute USGS Quad: 38090-G2—Columbia Bottom, Missouri

    • PEDON

  • Describers Name: Grant Butler, John Horton, Dennis Meinert
  • Current Taxonomic Class: Sandy over loamy, mixed, superactive, calcareous, mesic Oxyaquic Udifluvents
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Missouri Pedon
  • Pedon #: 5
  • Correlated Information:
  • Soil Name - TRELOAR
  • PSC - 25 to 102 cm.
  • Classificaton Date - 2/1/2012
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - udic
  • Moisture Subclass - oxyaquic
  • Sampled As Information:
  • Soil Name - Rocher
  • Classificaton Date - 4/9/2007
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: sandy alluvium derived from mixed over loamy alluvium derived from mixed over sandy alluvium derived from mixed over loamy alluvium derived from mixed
  • Landscape: river valley
  • Landform: flood-plain step
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: moderately well
  • Flooding: occasional flooding for long periods
  • Ponding: none ponding
  • Geology: Holocene Stage formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/9/2007 (actual site observation date)
  • Air Photo ID: 38090g2ne
  • Surface Water Kind: flooded
  • Surface Water Depth: 15
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • 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

    ochric epipedon

    strongly contrasting particle size class

    aquic conditions

    cambic horizon

    strongly contrasting particle size class

    0—15

    41—

    79—

    109—211

    109—

    —15—

    —1—

    —1—

    —102—

    —1—
    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

    1

    —

    —

    128

    —

    0

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 15 centimeters (0.0 to 5.9 inches); 50 percent very dark grayish brown (10YR 3/2) broken face and 50 percent brown (10YR 4/3) broken face loamy fine sand; weak very fine and fine subangular blocky structure; very friable; 3.0 very fine roots throughout; 3.0 very fine and 0.5 fine pores; fragments; very slight effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # MU006788; observed in push tube
    C1—15 to 41 centimeters (5.9 to 16.1 inches); 70 percent brown (10YR 4/3) interior and 30 percent dark grayish brown (10YR 4/2) interior stratified loamy fine sand; massive; very friable; 0.5 very fine roots throughout; 3.0 very fine and 0.5 fine pores; 10 percent very dark gray (10YR 3/1), moist, organic stains 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; fragments; very slight effervescence, by hcl, 1n; clear smooth boundary. Lab sample # MU006789; observed in push tube
    C2—41 to 79 centimeters (16.1 to 31.1 inches); 40 percent brown (10YR 4/3) interior and 60 percent dark grayish brown (10YR 4/2) interior stratified fine sandy loam; massive; very friable; 0.5 very fine roots throughout; 3.0 very fine and 0.5 fine pores; 1 percent medium faint irregular noncoherent cemented dark yellowish brown (10YR 4/4), moist, iron depletions with clear boundaries in matrix; fragments; very slight effervescence, by hcl, 1n; clear smooth boundary. Lab sample # MU006790; observed in push tube
    Cg—79 to 109 centimeters (31.1 to 42.9 inches); 50 percent dark gray (10YR 4/1) interior and 50 percent dark grayish brown (10YR 4/2) interior stratified loamy fine sand; massive; very friable; 0.5 very fine roots throughout; 3.0 very fine and 0.5 fine 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 brown (7.5YR 4/4), moist, iron depletions with clear boundaries in matrix; fragments; slight effervescence, by hcl, 1n; abrupt smooth boundary.; observed in push tube
    2Ab—109 to 145 centimeters (42.9 to 57.1 inches); 70 percent very dark grayish brown (10YR 3/2) broken face and 30 percent dark grayish brown (10YR 4/2) broken face silt loam; weak fine and medium subangular blocky structure; firm; 0.5 very fine roots throughout; 0.5 very fine tubular and 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; fragments; slight effervescence, by hcl, 1n; clear smooth boundary. Lab sample # MU006792; observed in push tube
    2Bg1—145 to 175 centimeters (57.1 to 68.9 inches); dark grayish brown (10YR 4/2) broken face silt loam; weak fine and medium subangular blocky structure; friable; 3.0 very 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 dark gray (10YR 4/1), moist, iron depletions with clear boundaries in matrix; 2 percent dark grayish brown (2.5Y 4/2), moist, worm casts throughout; fragments; slight effervescence, by hcl, 1n; clear smooth boundary.; observed in push tube
    2Bg2—175 to 211 centimeters (68.9 to 83.1 inches); dark grayish brown (10YR 4/2) broken face silt loam; weak fine and medium subangular blocky structure; firm; 3.0 very 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 dark gray (10YR 4/1), 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.; observed in push tube