IDENTIFIERS

  • Current Taxon Name (Soil Name): unnamed
  • OSD
  • Series Extent
  • User Site ID: S1972CA013003
  • User Pedon ID: S1972CA013003
  • Vegetation Plot ID: S1972CA013003
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 72C0005
  • NCSS Pedon Lab Data NASIS Record ID - 43939
  • Print Date: 4/28/2024

    • LOCATION

  • Location Description: 1/2 mile east of Cummings Skyway. Triangulation from BM 245 139W of North (true), BM 49 154 W of North, BM 246 178E of North. BM's in and near Port Costa.
  • State: California
  • County: CA013—Contra Costa
  • Non-MLRA Soil Survey Area: CA013—Contra Costa County, California

    • PEDON

  • Describers Name: EMK, LEW & PM
  • Current Taxonomic Class: Fine, montmorillonitic, thermic Typic Argixerolls
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - unnamed
  • Classificaton Date - 5/27/2005
  • Sampled As Information:
  • Soil Name - Los Osos
  • Classificaton Date - 4/12/1972
  • Dynamic Soil Properties:
  • Erosion Class - 2
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: interbedded sandstone and shale
  • Landform: upland slope
  • Slope Shape Down: convex
  • Runoff: high
  • Drainage Class: well
  • Bedrock: sandstone and shale
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/12/1972 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    AVSA

    BRDI3

    HORDE

    Avena sativa

    Bromus diandrus

    Hordeum

    common oat

    ripgut brome

    barley

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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

    5

    —

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    250

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    225

    508

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    14.4

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    A11—0 to 8 centimeters (0.0 to 3.1 inches); brown (10YR 5/3), dark brown (10YR 3/3), moist; clay loam; weak coarse platy structure; hard, friable, moderately sticky, moderately plastic; 21.0 very fine and fine roots; 0.5 very fine tubular pores; fragments; slightly acid, pH 6.5; clear smooth boundary. Lab sample # 72C00030
    A12—8 to 27 centimeters (3.1 to 10.6 inches); brown (10YR 4/3), 10YR 2/3 (10YR 2/3) and brown (10YR 4/3), moist; clay loam; moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 21.0 very fine and fine roots; 0.5 very fine tubular pores; fragments; neutral, pH 7.0; gradual smooth boundary. Lab sample # 72C00031
    A13—27 to 46 centimeters (10.6 to 18.1 inches);, dark grayish brown (10YR 4/2), moist; clay loam; moderate fine and medium subangular blocky structure; very hard, friable, moderately sticky, moderately plastic; 3.0 very fine and fine roots; 3.0 fine and medium tubular pores; fragments; slightly alkaline, pH 7.5; clear wavy boundary. Lab sample # 72C00032
    B2—46 to 64 centimeters (18.1 to 25.2 inches);, brown (10YR 4/3), moist; clay; weak fine and medium subangular blocky structure; very hard, friable, very sticky, moderately plastic; 3.0 very fine and fine roots; 3.0 very fine tubular and 0.5 fine and medium tubular pores; 30 percent thin clay films on surfaces along pores and 30 percent thin clay films on all faces of peds; fragments; moderately alkaline, pH 8.0; clear wavy boundary. Lab sample # 72C00033
    C1—64 to 102 centimeters (25.2 to 40.2 inches);, yellowish brown (10YR 5/6) and brown (7.5YR 5/4) and pale brown (10YR 6/3), moist; bedrock; massive; 3.0 very fine roots; 3.0 very fine tubular and 0.5 fine and medium tubular pores; fragments; moderately alkaline, pH 8.0; clear smooth boundary. Lab sample # 72C00034, 72C00038
    Cac2—102 to 145 centimeters (40.2 to 57.1 inches); strong brown (7.5YR 5/8) and reddish brown (5YR 5/3), black (5YR 2/1), moist; bedrock; massive; 0.5 very fine roots; 3.0 very fine tubular and 0.5 fine and medium tubular pores; fragments; moderately alkaline, pH 8.0; clear smooth boundary. Lab sample # 72C00035
    Cac3—145 to 168 centimeters (57.1 to 66.1 inches); bedrock; massive; 0.5 very fine roots; 3.0 very fine tubular and 0.5 fine and medium tubular pores; fragments; moderately alkaline, pH 8.0; clear smooth boundary. Lab sample # 72C00036
    C4—168 to 208 centimeters (66.1 to 81.9 inches); bedrock; massive; 0.5 very fine roots; 3.0 very fine tubular and 0.5 fine and medium tubular pores; fragments; moderately alkaline, pH 8.0. Lab sample # 72C00037