IDENTIFIERS

  • Current Taxon Name (Soil Name): Speck
  • OSD
  • Series Extent
  • User Site ID: S81TX171002
  • User Pedon ID: S81TX171002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - TAMU
  • Lab Pedon # - S81TX171002
  • NCSS Pedon Lab Data NASIS Record ID - 45674
  • Print Date: 11/23/2024

    • 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: 30.2868614
  • Std. Longitude: -99.0923080
  • Datum: WGS84
  • Location Description: Roger Dittmar Ranch; approximately 13 miles west of Fredericksburg on Texas State Highway 290; south onto Dittmar Ranch and past residence approx 1 mile just before reaching hilltop; pedon sampled on level bench 100 feet west of road (Atlas Sheet 41, Gillespie County soil survey report).
  • Map Unit: SsD—Tarpley clay, 1 to 8 percent slopes, stony
  • Country: US—United States
  • State: Texas
  • County: TX171—Gillespie
  • MLRA: 81B—Edwards Plateau, Central Part
  • Regional Office: SC—South Central
  • Non-MLRA Soil Survey Area: TX171—Gillespie County, Texas

    • PEDON

  • Describers Name: M.Rabenhorst,L.West,T.Moore
  • Current Taxonomic Class: Clayey, smectitic, superactive, thermic Lithic Argiustolls
  • Current Taxon Kind: taxadjunct
  • Pedon Type: not classified to current taxon name
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Correlated Information:
  • Soil Name - Speck
  • PSC - 13 to 41 cm.
  • Classificaton Date - 5/21/2012
  • Moisture Subclass - ustic
  • Sampled As Information:
  • Soil Name - Speck variant
  • Classificaton Date - 8/19/1982
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: limestone
  • Runoff: high
  • Drainage Class: well
  • Bedrock: indurated limestone, unspecified at 41cm
  • Geology: Fort Terret member of the Edwards Limestone formation in the Cretaceous group.
  • Surface Fragments: 5.00 percent nonflat subangular indurated chert,
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/19/1982 (actual site observation date)
  • Air Photo ID:
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - pastureland, tame
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Yield Study ID -
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, lithic

    indurated

    41 -

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

    mollic epipedon

    argillic horizon

    lithic contact

    0—13

    13—41

    41—

    —-

    —-

    —-
    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

    —

    —

    625

    —

    250

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 13 centimeters (0.0 to 5.1 inches);, dark brown (7.5YR 3/2), moist; silt loam; weak medium subangular blocky, and moderate medium granular structure; friable; 8.0 fine and medium roots; fragments; neutral, pH 7.0; clear smooth boundary. Lab sample # TAMU1277
    Bt1—13 to 27 centimeters (5.1 to 10.6 inches);, dark reddish brown (2.5YR 3/4), moist; clay; moderate medium subangular blocky structure; firm; 20 percent distinct clay films on all faces of peds; fragments; slightly acid, pH 6.5; clear smooth boundary. Lab sample # TAMU1278. discontinuous - phpvsfiid 332512; discontinuous - phpvsfiid 332512
    Bt2—27 to 41 centimeters (10.6 to 16.1 inches);, dark reddish brown (2.5YR 3/4), moist; clay; moderate medium prismatic parts to moderate fine and medium subangular blocky structure; very firm; 20 percent distinct clay films on all faces of peds; 2 percent worm casts; fragments; slightly acid, pH 6.5; abrupt smooth boundary. Lab sample # TAMU1279. discontinuous - phpvsfiid 332513; discontinuous - phpvsfiid 332513
    R—41 centimeters (16.1 inches);, very pale brown (10YR 8/2), moist; fragments. Lab sample # TAMU1280