IDENTIFIERS

  • Current Taxon Name (Soil Name): Contra Costa
  • OSD
  • Series Extent
  • User Site ID: S1980-CA-05-082x
  • User Pedon ID: 80-CA-05-082x
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - UCDAVIS
  • Lab Pedon # - UCD8005082
  • NCSS Pedon Lab Data NASIS Record ID - 42367
  • 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: 37.9861990
  • Std. Longitude: -120.8068810
  • Datum: WGS84
  • Township: 2N
  • Range: 11E
  • Section: 31
  • PLSS Details: NE/4, NW/4
  • Map Unit: 7085—Bonanza-Loafercreek complex, 3 to 15 percent slopes
  • State: California
  • County: CA009—Calaveras
  • MLRA: 18—Sierra Nevada Foothills
  • Non-MLRA Soil Survey Area: CA630—Central Sierra Foothills Area, California, Parts of Calaveras and Tuolumne Counties
  • 7.5 Minute USGS Quad: 37120-H7—Bachelor Valley, California

    • PEDON

  • Describers Name: COS
  • Current Taxonomic Class: Fine, mixed, superactive, thermic Mollic Palexeralfs
  • Current Taxon Kind: taxadjunct
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Contra Costa
  • PSC - 28 to 78 cm.
  • Classificaton Date - 1/22/2016
  • Classifier - Andrew Paolucci
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - CONTRA COSTA
  • Taxonomic Class - Fine, mixed, thermic Mollic Haploxeralfs
  • Classificaton Date - 3/2/2009
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: RES
  • Slope Complexity: simple
  • Drainage Class: well
  • Bedrock: sandstone, unspecified
  • Geology: Sandstone. Geologic Formation: formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 3/2/2009 (entry creation 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
    • Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    paralithic contact

    0—28

    28—107

    107—132

    —-

    —-

    —-
    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

    12

    —

    —

    111

    —

    45

    432

    —

    —

    18.3

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 18 centimeters (0.0 to 7.1 inches); brown (7.5YR 5/4), dark reddish brown (5YR 3/3), moist; loam; 48 percent sand; 35 percent silt; 17 percent clay; moderate coarse angular blocky structure; very hard, firm, slightly sticky, slightly plastic; 21.0 very fine roots throughout and 21.0 roots throughout; 21.0 very fine tubular and 21.0 irregular pores; fragments; moderately acid, pH 5.6; abrupt smooth boundary. Lab sample # UCD04033
    AB—18 to 28 centimeters (7.1 to 11.0 inches); brown (7.5YR 5/4), dark reddish brown (5YR 3/3), moist; loam; 45 percent sand; 35 percent silt; 21 percent clay; massive; very hard, firm, slightly sticky, slightly plastic; 3.0 very fine roots and 3.0 roots; 21.0 very fine tubular and 21.0 very fine irregular and 21.0 irregular and 21.0 tubular pores; fragments; strongly acid, pH 5.5; clear smooth boundary. Lab sample # UCD04034
    Bt1—28 to 38 centimeters (11.0 to 15.0 inches); brown (7.5YR 5/4), brown (7.5YR 4/4), moist; clay; 28 percent sand; 26 percent silt; 46 percent clay; strong very coarse angular blocky parts to moderate very coarse angular blocky structure; extremely hard, extremely firm, moderately sticky, moderately plastic; 0.5 very fine roots throughout and 0.5 roots throughout; 21.0 very fine tubular and 21.0 very fine irregular and 21.0 irregular and 21.0 tubular pores; 75 percent clay films on top faces of peds and 75 percent clay films on surfaces along pores; fragments; strongly acid, pH 5.4; clear wavy boundary. Lab sample # UCD04035
    Bt2—38 to 69 centimeters (15.0 to 27.2 inches); brown (7.5YR 5/4), reddish brown (5YR 4/4), moist; clay; 29 percent sand; 27 percent silt; 44 percent clay; strong very coarse angular blocky parts to moderate very coarse angular blocky structure; extremely hard, extremely firm, moderately sticky, moderately plastic; 0.1 very fine roots throughout; 0.5 pores; 75 percent clay films; fragments; moderately acid, pH 5.8; gradual wavy boundary. Lab sample # UCD04036
    Bt3—69 to 86 centimeters (27.2 to 33.9 inches); brown (7.5YR 5/4), brown (7.5YR 5/4), moist; sandy clay loam; 45 percent sand; 23 percent silt; 32 percent clay; massive; extremely hard, extremely firm, moderately sticky, moderately plastic; 0.1 very fine roots throughout; 0.5 pores; fragments; neutral, pH 6.8; gradual wavy boundary. Lab sample # UCD04037
    BCt—86 to 107 centimeters (33.9 to 42.1 inches); reddish yellow (5YR 6/6), brown (7.5YR 5/4), moist; sandy clay loam; 56 percent sand; 18 percent silt; 26 percent clay; massive; slightly hard, friable, nonsticky, slightly plastic; 0.1 very fine roots throughout and 0.1 roots throughout; 3.0 very fine vesicular and 3.0 very fine irregular and 3.0 irregular and 3.0 vesicular pores; 1 percent clay films between sand grains; fragments; neutral, pH 7.1; abrupt wavy boundary. Lab sample # UCD04038
    Cr—107 to 132 centimeters (42.1 to 52.0 inches); sand; fragments. Lab sample # UCD04039