IDENTIFIERS

  • Current Taxon Name (Soil Name): Stephenville
  • OSD
  • Series Extent
  • User Site ID: S1989OK083003
  • User Pedon ID: S1989OK083003
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - KSSL
  • Lab Pedon # - 89P0584
  • NCSS Pedon Lab Data NASIS Record ID - 61686
  • Print Date: 2/2/2025

    • 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: 35.7869453
  • Std. Longitude: -97.3552780
  • Datum: WGS84
  • Township: 15N
  • Range: 2W
  • Section: 12
  • PLSS Details: 600 feet W and 950 feet N of the SE corner
  • Map Unit: StDC-1—Stephenville-Darsil complex, 1 to 5 percent slopes
  • Country: US—United States
  • State: Oklahoma
  • County: OK083—Logan
  • MLRA: 84A—North Cross Timbers
  • Regional Office: SC—South Central
  • MLRA Soil Survey Area: SC-STW—Stillwater, Oklahoma
  • 7.5 Minute USGS Quad: 35097-G3—Guthrie SE, Oklahoma

    • PEDON

  • Current Taxonomic Class: Fine-loamy, siliceous, active, thermic Ultic Haplustalfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 3
  • Correlated Information:
  • Soil Name - Stephenville
  • PSC - 20 to 64 cm.
  • Classificaton Date - 9/17/2013
  • Classifier - Walt Schaefer
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Subclass - udic
  • Sampled As Information:
  • Soil Name - Stephenville
  • Taxonomic Class - Fine-loamy, siliceous, active, thermic Ultic Haplustalfs
  • Taxon Kind - series
  • Classificaton Date - 9/1/1989
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 2
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1
  • QA Status: level 1


    • SITE

  • Parent Material: colluvium derived from sandstone over residuum weathered from sandstone
  • Landscape: hills
  • Landform: hillslope
  • Hill Slope Profile: shoulder
  • Slope Shape Down: convex
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/1/1989 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, paralithic

    weakly coherent

    64 - 89

    - 25 -

    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    paralithic contact

    0—13

    20—64

    64—89

    —13—

    —44—

    —25—
    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

    5

    —

    —

    366

    —

    90

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 13 centimeters (0.0 to 5.1 inches); brown (7.5YR 5/2), dark brown (7.5YR 3/2), moist; fine sandy loam; 73 percent sand; 19 percent silt; 8 percent clay; moderate medium granular structure; hard, friable; 2.5 medium roots; 2.5 very fine tubular pores; , 1 percent by weight nonflat subrounded very strongly coherent cemented 2-5-75 millimeter sandstone, unspecified fragments observed by weighed method; moderately acid, pH 5.7, hellige-truog; clear smooth boundary. Lab sample # 89P03212. common medium roots
    E—13 to 20 centimeters (5.1 to 7.9 inches); light brown (7.5YR 6/4), brown (7.5YR 4/4), moist; fine sandy loam; 76 percent sand; 18 percent silt; 7 percent clay; moderate medium granular structure; hard, friable; 2.5 medium and coarse roots; 2.5 very fine tubular pores; , 3 percent by weight nonflat subrounded very strongly coherent cemented 2-5-75 millimeter sandstone, unspecified fragments observed by weighed method; strongly acid, pH 5.2, hellige-truog; abrupt smooth boundary. Lab sample # 89P03213. common medium and coarse roots
    Bt1—20 to 46 centimeters (7.9 to 18.1 inches); red (2.5YR 5/6), red (2.5YR 4/6), moist; sandy clay loam; 64 percent sand; 12 percent silt; 25 percent clay; moderate medium prismatic, and moderate medium subangular blocky structure; very hard, firm; 2.5 medium roots; 5.5 medium tubular and 2.5 fine tubular pores; 37 percent distinct clay films on faces of peds; , 10 percent by weight nonflat subrounded very strongly coherent cemented 2-5-75 millimeter sandstone, unspecified fragments observed by weighed method; slightly acid, pH 6.2, hellige-truog; gradual smooth boundary. Lab sample # 89P03214. common clay films surface features on faces of peds; common medium roots
    Bt2—46 to 64 centimeters (18.1 to 25.2 inches); red (2.5YR 5/6), red (2.5YR 4/6), moist; very fine sandy loam; 72 percent sand; 13 percent silt; 15 percent clay; moderate medium prismatic, and moderate medium subangular blocky structure; very hard, firm; 2.5 medium roots; 5.5 medium tubular and 2.5 fine tubular pores; 37 percent distinct clay films on faces of peds; , 1 percent by weight nonflat subrounded very strongly coherent cemented 2-5-75 millimeter sandstone, unspecified fragments observed by weighed method; slightly acid, pH 6.2, hellige-truog; clear smooth boundary. Lab sample # 89P03215. 14 percent fragments of weathered sandstone by volume; common clay films surface features on faces of peds; common medium roots
    Cr—64 to 89 centimeters (25.2 to 35.0 inches); bedrock; fragments. weathered sandstone that is rippable; few roots penetrating fractures in sandstone; this horizon was not sampled