IDENTIFIERS

  • Current Taxon Name (Soil Name): Pedernales
  • OSD
  • Series Extent
  • User Site ID: S81TX171003
  • User Pedon ID: S81TX171003
  • Vegetation Plot ID: S81TX171003
  • User Site Association ID: Pedernales_DSP_2024
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - TAMU
  • Lab Pedon # - S81TX171003
  • NCSS Pedon Lab Data NASIS Record ID - 45675
  • Print Date: 11/12/2024

    • 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: 30.2858887
  • Std. Longitude: -98.7990799
  • Datum: WGS84
  • Location Description: From bridge across Palo Alto Creek on FR 1631, 660 feet west and 700 feet, site is 75 feet south of abandoned railroad right-of-way. Atlas Sheet 45 of Gillespie County soil survey report.
  • Map Unit: PeB—Pedernales fine sandy loam, 1 to 3 percent slopes
  • 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: Wilding,Hallmark,Girdner,Brockmann,Abbott,Patty
  • Current Taxonomic Class: Fine, mixed, superactive, thermic Typic Paleustalfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Correlated Information:
  • Soil Name - Pedernales
  • PSC - 13 to 63 cm.
  • Classificaton Date - 2/12/2014
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Pedernales
  • Classificaton Date - 4/2/1981
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: alluvium
  • Landform: stream terrace
  • Runoff: high
  • Drainage Class: well
  • Bedrock: weakly coherent sandstone, unspecified at 221cm
  • Geology: Pleistocene Outwash formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/2/1981 (actual site observation date)
  • Air Photo ID:
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, shrubby
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Yield Study ID -
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    BUDA

    ERPI5

    PRGLG

    QUMA3

    QUST

    Buchloe dactyloides

    Erioneuron pilosum

    Prosopis glandulosa var. glandulosa

    Quercus marilandica

    Quercus stellata

    buffalograss

    hairy woollygrass

    honey mesquite

    blackjack oak

    post oak

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    —

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    —

    —

    —

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

    ochric epipedon

    argillic horizon

    calcic horizon

    paralithic contact

    0—13

    13—221

    114—221

    221—338

    —-

    —-

    —-

    —-
    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

    2

    —

    —

    490

    —

    90

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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    A—0 to 13 centimeters (0.0 to 5.1 inches); brown (10YR 5/3), brown (10YR 4/3), moist; fine sandy loam; weak fine granular structure; hard, friable; 3.0 fine roots; fragments; slightly acid, pH 6.5; abrupt smooth boundary.
    Bt1—13 to 55 centimeters (5.1 to 21.7 inches); red (2.5YR 5/6), red (2.5YR 4/6), moist; clay; moderate medium subangular blocky structure; extremely hard, firm; 3.0 fine roots; 0.9 fine pores; 1 percent organic stains on surfaces along pores and 2 percent organic stains on all faces of peds and 15 percent clay films on all faces of peds; fragments; 2 percent krotovinas (volume percent); slightly acid, pH 6.5; clear smooth boundary. Lab sample # TAMU987
    Bt2—55 to 90 centimeters (21.7 to 35.4 inches);, strong brown (7.5YR 5/6), moist; clay; moderate fine angular blocky, and moderate medium angular blocky structure; extremely hard, firm; 0.9 fine roots; 0.9 fine pores; 5 percent organic stains on all faces of peds and 15 percent clay films on all faces of peds; 20 percent medium prominent red (2.5YR 4/6), moist, masses of oxidized iron with sharp boundaries in matrix and 20 percent medium distinct brown (10YR 5/3), moist, masses of oxidized iron with clear boundaries in matrix; fragments; slightly acid, pH 6.5; clear smooth boundary. Lab sample # TAMU988
    Bt3—90 to 114 centimeters (35.4 to 44.9 inches); brown (2.5YR 5/6), red (2.5YR 4/6), moist; clay; moderate fine angular blocky, and moderate medium angular blocky structure; extremely hard, firm; 0.9 fine roots; 0.9 fine pores; 2 percent slickensides (pedogenic) and 5 percent clay films on all faces of peds; fragments; neutral, pH 7.0; abrupt wavy boundary. Lab sample # TAMU989
    Btk1—114 to 170 centimeters (44.9 to 66.9 inches);, light brown (7.5YR 6/4), moist; clay loam; moderate fine angular blocky, and moderate medium angular blocky structure; hard, friable; 0.9 very fine roots; 0.9 fine pores; 5 percent distinct organic stains in root channels and/or pores and 15 percent distinct clay films on all faces of peds; 1 percent iron-manganese concretions with sharp boundaries and 1 percent iron-manganese nodules with clear boundaries and 20 percent coarse distinct yellowish red (5YR 5/6), moist, masses of oxidized iron with sharp boundaries; 10 percent medium pinkish white (7.5YR 8/2), moist, carbonate masses; fragments; slightly alkaline, pH 7.5; diffuse wavy boundary. Lab sample # TAMU990. continuous - phpvsfiid 332528; continuous - phpvsfiid 332528
    Btk2—170 to 201 centimeters (66.9 to 79.1 inches);, light brown (7.5YR 6/4), moist; clay loam; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, friable; 0.9 very fine roots; 0.9 fine pores; 2 percent faint organic stains on surfaces along root channels and 10 percent distinct clay films on surfaces along pores; 1 percent fine iron-manganese concretions with sharp boundaries and 1 percent fine iron-manganese nodules with sharp boundaries and 1 percent fine faint brown (10YR 5/3), moist, masses of oxidized iron with clear boundaries and 25 percent coarse distinct yellowish red (5YR 5/6), moist, masses of oxidized iron with sharp boundaries; 10 percent medium pinkish white (7.5YR 8/2), moist, carbonate masses; fragments; slightly alkaline, pH 7.5; diffuse wavy boundary. Lab sample # TAMU991. discontinuous - phpvsfiid 332532; discontinuous - phpvsfiid 332532
    Btk3—201 to 221 centimeters (79.1 to 87.0 inches);, light brown (7.5YR 6/4), moist; clay loam; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, friable; 0.9 very fine roots; 0.9 fine pores; 5 percent distinct organic stains on surfaces along root channels and 10 percent distinct clay films on all faces of peds; 1 percent fine faint brown (10YR 5/3), moist, masses of oxidized iron with clear boundaries and 1 percent fine iron-manganese concretions with sharp boundaries and 1 percent fine iron-manganese nodules with sharp boundaries and 25 percent coarse distinct yellowish red (5YR 5/6), moist, masses of oxidized iron with sharp boundaries; 10 percent medium pinkish white (7.5YR 8/2), moist, carbonate masses; fragments; slightly alkaline, pH 7.5; abrupt smooth boundary. discontinuous - phpvsfiid 332534; discontinuous - phpvsfiid 332534
    C1—221 to 287 centimeters (87.0 to 113.0 inches);, pink (5YR 8/3), moist; sandy clay loam; 20 percent fine faint pale brown (10YR 6/3), moist, masses of oxidized iron with clear boundaries; fragments; moderately alkaline, pH 8.0; diffuse boundary. Lab sample # TAMU992
    C2—287 to 338 centimeters (113.0 to 133.1 inches);, pink (5YR 8/3), moist; sandy clay loam; 20 percent fine faint pale brown (10YR 6/3), moist, masses of oxidized iron with clear boundaries; fragments; moderately alkaline, pH 8.0. Lab sample # TAMU993