IDENTIFIERS

  • Current Taxon Name (Soil Name): Thedalund
  • OSD
  • Series Extent
  • User Site ID: 12CO005001
  • User Pedon ID: S2012CO005001
  • Vegetation Plot ID: 12CO005001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 12N7618
  • NCSS Pedon Lab Data NASIS Record ID - 55376
  • Print Date: 11/11/2024

    • 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: 39.7153056
  • Std. Longitude: -103.8140000
  • Datum: WGS84
  • Township: 4S
  • Range: 57W
  • Section: 7
  • PLSS Details: 1,400 feet north and 200 feet east of the southwest corner
  • Location Description: Approximately 12 miles west and 2 miles south of Last Chance, CO.
  • Map Unit: BhD—Baca-Thedalund loams, 3 to 9 percent slopes
  • State: Colorado
  • County: CO005—Arapahoe
  • MLRA: 67B—Central High Plains, Southern Part
  • MLRA Soil Survey Area: NW-FTM—Fort Morgan, Colorado
  • Non-MLRA Soil Survey Area: CO005—Arapahoe County, Colorado
  • 7.5 Minute USGS Quad: 39103-F7—Cottonwood Valley North, Colorado

    • PEDON

  • Describers Name: Andy Steinert, Mike Moore, Chad Remley, Joe Chiaretti, Lee Neve
  • Current Taxonomic Class: Fine-loamy, mixed, active, mesic Gypsic Haplustepts
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: PedonPC
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Thedalund
  • Taxonomic Class - Fine-loamy, mixed, active, mesic Gypsic Haplustepts
  • PSC - 25 to 100 cm.
  • Classificaton Date - 10/25/2011
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - ustic
  • Moisture SUBClass - aridic (torric)
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: eolian deposits over residuum weathered from shale
  • Landform: ridge
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: shoulder
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Runoff: high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: moderately coherent shale, unspecified at 118cm
  • Geology: Upper Unit Pierre Shale formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

  • Ecological Sites. (Click Ecological Site ID For Link to EDIT.)
    Ecological Site ID Ecological Site Name Correlation Data Classifier
    R067BY008CO Loamy Slopes Oct 31 2023

    • SITE OBSERVATION

  • Observation Date: 10/25/2011 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, grassland
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - sunny
  • Current Air Temp - 7
    • 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 % % % % % % % % % % % % %

    Ap

    Bk

    2Bky

    2By

    2C

    0

    12

    40

    65

    89

    12

    40

    65

    89

    118

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    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

    Ap

    Bk

    2Bky

    2By

    2C

    0

    12

    40

    65

    89

    12

    40

    65

    89

    118

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    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 %

    Ap

    Bk

    2Bky

    2By

    2C

    0

    12

    40

    65

    89

    12

    40

    65

    89

    118

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    ec meter, 1:1 water

    ec meter, 1:1 water

    ec meter, 1:1 water

    ec meter, 1:1 water

    ec meter, 1:1 water

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    7

    9

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    6

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

    PASM

    SCSC

    SPCR

    YUCCA

    Pascopyrum smithii

    Schizachyrium scoparium

    Sporobolus cryptandrus

    Yucca

    western wheatgrass

    little bluestem

    sand dropseed

    yucca

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    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, paralithic

    moderately coherent

    118 -

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

    ochric epipedon

    cambic horizon

    gypsic horizon

    paralithic contact

    0—12

    12—89

    40—89

    118—

    —12—

    —77—

    —49—

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    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

    6

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    1554.8

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    96

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    Ap—0 to 12 centimeters (0.0 to 4.7 inches); yellowish brown (10YR 5/4) broken face, brown (10YR 4/3) broken face, moist; clay loam; 25 percent sand; 43 percent silt; 32 percent clay; weak coarse subangular blocky parts to moderate fine granular structure; slightly hard, very friable, moderately sticky, moderately plastic; Ksat of 2.82 um/s; moderately slow permeability; 3.0 very fine roots throughout and 2.0 fine roots throughout; carbonate, finely disseminated throughout; fragments; strong effervescence, by hcl, 1n; neutral, pH 7.2, pH meter; clear smooth boundary. Lab sample # 12N00995; observed in trench
    Bk—12 to 40 centimeters (4.7 to 15.7 inches); light yellowish brown (2.5Y 6/3) broken face, light olive brown (2.5Y 5/3) broken face, moist; clay loam; 20 percent sand; 48 percent silt; 32 percent clay; moderate coarse prismatic parts to moderate coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; Ksat of 2.82 um/s; moderately slow permeability; 2.0 very fine roots throughout and 1.0 fine roots throughout; carbonate, finely disseminated throughout and 2 percent fine irregular carbonate masses on faces of peds; fragments; violent effervescence, by hcl, 1n; neutral, pH 7.3, pH meter; clear wavy boundary. Lab sample # 12N00996; observed in trench
    2Bky—40 to 65 centimeters (15.7 to 25.6 inches); pale yellow (2.5Y 7/3) broken face, light yellowish brown (2.5Y 6/4) broken face, moist; loam; 30 percent sand; 46 percent silt; 24 percent clay; 2 percent yellowish brown (10YR 5/6) fine mottles; moderate coarse subangular blocky, and moderate fine and medium subangular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; Ksat of 9.17 um/s; moderate permeability; 2.0 very fine roots throughout and 2.0 fine roots throughout; 3 percent fine irregular carbonate masses on faces of peds and 20 percent fine and medium irregular gypsum crystal clusters on faces of peds; 2 percent by volume nonflat angular moderately coherent cemented 2-3-5 millimeter shale, unspecified fragments; slight effervescence, by hcl, 1n; neutral, pH 7.1, pH meter; clear wavy boundary. Lab sample # 12N00997; observed in trench
    2By—65 to 89 centimeters (25.6 to 35.0 inches); light yellowish brown (2.5Y 6/3) broken face, light olive brown (2.5Y 5/3) broken face, moist; silty clay loam; 20 percent sand; 52 percent silt; 28 percent clay; 3 percent yellowish brown (10YR 5/6) fine and medium mottles; moderate coarse subangular blocky parts to moderate fine angular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; Ksat of 2.82 um/s; moderately slow permeability; 1.0 very fine roots throughout and 1.0 fine roots throughout; carbonate, finely disseminated throughout and 10 percent coarse irregular gypsum crystal clusters on faces of peds and 5 percent medium and coarse irregular gypsum crystal clusters on faces of peds; 5 percent by volume nonflat angular 2-3-5 millimeter shale, unspecified fragments; slight effervescence, by hcl, 1n; neutral, pH 7.1, pH meter; clear wavy boundary. Lab sample # 12N00998; observed in trench
    2C—89 to 118 centimeters (35.0 to 46.5 inches); light yellowish brown (2.5Y 6/3) broken face, light olive brown (2.5Y 5/4) broken face, moist; silty clay loam; 15 percent sand; 55 percent silt; 30 percent clay; 5 percent yellowish brown (10YR 5/6) fine and medium mottles; moderate coarse subangular blocky parts to strong fine and medium angular blocky structure; moderately hard, friable, slightly sticky, slightly plastic; Ksat of 2.82 um/s; moderately slow permeability; 0.5 very fine roots throughout; 10 percent coarse irregular gypsum crystal clusters on faces of peds and 5 percent medium and coarse irregular gypsum crystal clusters on faces of peds; 10 percent by volume nonflat angular 2-3-5 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; neutral, pH 7.1, pH meter; gradual smooth boundary. Lab sample # 12N00999; observed in trench
    2Cr1—118 to 151 centimeters (46.5 to 59.4 inches); bedrock; 10 percent yellowish brown (10YR 5/6) fine and medium mottles; Ksat of 0.705 um/s; slow permeability; 0.5 very fine roots in cracks; 2 percent fine and medium threadlike gypsum crystal clusters on faces of peds and 4 percent medium irregular gypsum crystal clusters on faces of peds; fragments; gradual smooth boundary. Lab sample # 12N01000; observed in trench
    2Cr2—151 to 183 centimeters (59.4 to 72.0 inches); bedrock; 10 percent yellowish brown (10YR 5/6) fine and medium mottles; Ksat of 0.705 um/s; slow permeability; 2 percent fine threadlike gypsum crystal clusters on faces of peds and 2 percent medium irregular gypsum crystal clusters on faces of peds; fragments. Lab sample # 12N01001; observed in trench