IDENTIFIERS

  • Current Taxon Name (Soil Name): Double
  • OSD
  • Series Extent
  • User Site ID: S2008-TX109-021
  • User Pedon ID: S2008-TX109-021
  • Vegetation Plot ID: S08-TX109-021
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - TAMU
  • Lab Pedon # - S08TX109021
  • NCSS Pedon Lab Data NASIS Record ID - 45587
  • Print Date: 2/17/2025

    • 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: 31.2295647
  • Std. Longitude: -104.4257202
  • Datum: WGS84
  • Country: US—United States
  • State: Texas
  • County: TX109—Culberson
  • MLRA: 42—Southern Desertic Basins, Plains, and Mountains
  • Regional Office: 8—Phoenix, AZ
  • MLRA Soil Survey Area: SW-MAF—Marfa, Texas
  • Non-MLRA Soil Survey Area: TX109—Culberson County, Texas
  • 7.5 Minute USGS Quad: 31104-B4—East Hunter Canyon, Texas

    • PEDON

  • Describers Name: Tom Hallmark, Jim Clausen, James Gordon, Tyson Morley, Deanna Faubion, and Riley Dayberry
  • Current Taxonomic Class: Fine-loamy, mixed, superactive, thermic Ustic Haplocambids
  • Current Taxon Kind: series
  • Pedon Type: TUD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Correlated Information:
  • Soil Name - Double
  • PSC - 25 to 100 cm.
  • Classificaton Date - 5/18/2016
  • Classifier - Lynn Loomis
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - ustic
  • Sampled As Information:
  • Soil Name - Double
  • Classificaton Date - 1/8/2008
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1


    • SITE

  • Parent Material: alluvium derived from igneous, unspecified
  • Landform: alluvial fan
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 1/8/2008 (actual site observation date)
  • Air Photo ID:
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - shrub cover
  • Site Obs. Cover Kind 2 - native shrubs
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Yield Study ID -
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    A

    A

    A

    Bw1

    Bw1

    Bw1

    Bw2

    Bw2

    Bw2

    Bk1

    Bk1

    Bk1

    Bk2

    Bk2

    Bk2

    Bk3

    Bk3

    Bk3

    0

    0

    0

    10

    10

    10

    34

    34

    34

    58

    58

    58

    96

    96

    96

    141

    141

    141

    10

    10

    10

    34

    34

    34

    58

    58

    58

    96

    96

    96

    141

    141

    141

    203

    203

    203

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    A

    A

    A

    Bw1

    Bw1

    Bw1

    Bw2

    Bw2

    Bw2

    Bk1

    Bk1

    Bk1

    Bk2

    Bk2

    Bk2

    Bk3

    Bk3

    Bk3

    0

    0

    0

    10

    10

    10

    34

    34

    34

    58

    58

    58

    96

    96

    96

    141

    141

    141

    10

    10

    10

    34

    34

    34

    58

    58

    58

    96

    96

    96

    141

    141

    141

    203

    203

    203

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    A

    A

    A

    Bw1

    Bw1

    Bw1

    Bw2

    Bw2

    Bw2

    Bk1

    Bk1

    Bk1

    Bk2

    Bk2

    Bk2

    Bk3

    Bk3

    Bk3

    0

    0

    0

    10

    10

    10

    34

    34

    34

    58

    58

    58

    96

    96

    96

    141

    141

    141

    10

    10

    10

    34

    34

    34

    58

    58

    58

    96

    96

    96

    141

    141

    141

    203

    203

    203

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    ec meter, saturated paste

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    5

    —

    —

    9

    —

    —

    14

    —

    —

    16

    —

    —

    15

    —

    —

    16

    —

    —

    —

    —

    0

    —

    —

    0

    —

    —

    0

    —

    —

    0

    —

    —

    0

    —

    —

    0

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    0

    —

    —

    0

    —

    —

    0

    —

    —

    1

    —

    —

    1

    —

    —

    1

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    EPHED

    FLCE

    LATR2

    OPENE

    OPIM

    PRGLT

    SCBR2

    Ephedra

    Flourensia cernua

    Larrea tridentata

    Opuntia engelmannii var. engelmannii

    Opuntia imbricata

    Prosopis glandulosa var. torreyana

    Scleropogon brevifolius

    jointfir

    American tarwort

    creosote bush

    cactus apple

    tree cholla

    western honey mesquite

    burrograss

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    ochric epipedon

    cambic horizon

    calcic horizon

    0—10

    10—141

    141—210

    —-

    —-

    —-
    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

    —

    —

    1309

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 10 centimeters (0.0 to 3.9 inches); pale brown (10YR 6/3) broken face, brown (10YR 4/3) broken face, moist; loam; 14 percent clay; moderate medium platy structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate excavation difficulty; 1.5 very fine roots throughout and 3.0 fine roots throughout; 1.0 fine irregular pores; 1 percent by volume nonflat subrounded indurated 2-3-5 millimeter limestone, unspecified fragments; l of Field Texture Class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter; gradual smooth boundary. Lab sample # TAMU7297; dry when described; observed in trench
    Bw1—10 to 34 centimeters (3.9 to 13.4 inches); brown (10YR 5/3) broken face, brown (10YR 4/3) broken face, moist; loam; 18 percent clay;—Error in Exists On—structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate excavation difficulty; 2.0 very fine roots and 3.0 fine roots; 3.0 fine irregular pores; 2 percent by volume nonflat subrounded indurated 2-3-5 millimeter limestone, unspecified fragments; sil of Field Texture Class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter; gradual smooth boundary. Lab sample # TAMU7298; dry when described; observed in trench
    Bw2—34 to 58 centimeters (13.4 to 22.8 inches); yellowish brown (10YR 5/4) broken face, dark yellowish brown (10YR 4/4) broken face, moist; loam; 25 percent clay; weak medium prismatic parts to moderate coarse subangular blocky parts to moderate medium subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; moderate excavation difficulty; 1.0 very fine roots throughout and 0.5 medium roots and 1.0 fine roots throughout; 2.0 fine high-continuity irregular pores; 3 percent by volume nonflat subrounded indurated 2-5-20 millimeter limestone, unspecified fragments; l of Field Texture Class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter; gradual smooth boundary. Lab sample # TAMU7299; dry when described; observed in trench
    Bk1—58 to 96 centimeters (22.8 to 37.8 inches); yellowish brown (10YR 5/4) broken face, dark yellowish brown (10YR 4/4) broken face, moist; clay loam; 25 percent clay; weak medium prismatic parts to moderate medium subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; high excavation difficulty; 2.0 very fine roots throughout; 1.0 fine irregular pores; 3 percent fine faint threadlike noncoherent cemented carbonate masses on vertical faces of peds and 1 percent fine faint spherical weakly coherent cemented carbonate nodules in matrix; 4 percent by volume nonflat subrounded indurated 2-39-75 millimeter limestone, unspecified fragments; l of Field Texture Class; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter; gradual smooth boundary. Lab sample # TAMU7300; dry when described; observed in trench
    Bk2—96 to 141 centimeters (37.8 to 55.5 inches); brown (7.5YR 5/4) broken face, brown (7.5YR 4/4) broken face, moist; clay loam; 25 percent clay; moderate medium subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; high excavation difficulty; 1.0 fine roots throughout; 1.0 medium irregular and 1.0 fine irregular pores; 2 percent fine threadlike noncoherent cemented carbonate masses in matrix and 1 percent fine spherical strongly coherent cemented carbonate nodules in matrix; 5 percent by volume nonflat subrounded indurated 2-39-75 millimeter limestone, unspecified fragments; l of Field Texture Class; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.1, pH meter; gradual smooth boundary. Lab sample # TAMU7301; dry when described; observed in trench
    Bk3—141 to 200 centimeters (55.5 to 78.7 inches); light brown (7.5YR 6/4) broken face, brown (7.5YR 5/4) broken face, moist; clay loam; 23 percent clay; moderate medium subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; high excavation difficulty; 1.0 very fine roots throughout; 6.0 fine vesicular pores; 5 percent fine threadlike noncoherent cemented carbonate masses in matrix and 2 percent fine irregular weakly coherent cemented carbonate nodules in matrix; 4 percent by volume nonflat subrounded indurated 2-39-75 millimeter limestone, unspecified fragments; scl of Field Texture Class; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.0, pH meter. Lab sample # TAMU7302; dry when described; observed in trench