IDENTIFIERS

  • Current Taxon Name (Soil Name): Sixbit
  • OSD
  • Series Extent
  • User Site ID: 07-SMM-009
  • User Pedon ID: S2007CA109002
  • Vegetation Plot ID: 07-SMM-009
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 07N0471
  • NCSS Pedon Lab Data NASIS Record ID - 19074
  • Print Date: 2/16/2025

    • 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: 37.8621407
  • Std. Longitude: -120.5085297
  • Datum: WGS84
  • Township: 1 S
  • Range: 13 E
  • Section: 11
  • PLSS Details: about 2580 feet west and 2330 feet north of the southeast corner
  • Location Description: about 1 mile northeast of the community of Keystone, California
  • Map Unit: 7159—Crimeahouse-Sixbit complex, 30 to 70 percent slopes
  • Country: US—United States
  • State: California
  • County: CA109—Tuolumne
  • 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-G5—Keystone, California

    • PEDON

  • Describers Name: Sue Malone
  • Current Taxonomic Class: Loamy-skeletal, magnesic, thermic Lithic Argixerolls
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Sixbit (flagged as OSD)
  • PSC - 12 to 48 cm.
  • Classificaton Date - 7/19/2018
  • Classifier - Cathy Scott
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Hennekenot
  • Classificaton Date - 4/11/2007
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: residuum weathered from serpentinite
  • Landscape: foothills
  • Landform: hillslope
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Drainage Class: well
  • Bedrock: very strongly coherent slight weathered serpentinite at 48cm with 10 to <45
  • Geology: Ultramafic Rock formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/11/2007 (actual site observation date)
  • Plant Association Name: Chaparral
  • 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
  • Current Weather - rain
  • Current Air Temp - 14
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    CECU

    DACA3

    DIAU

    ERCA6

    HEAR5

    PISA2

    Ceanothus cuneatus

    Danthonia californica

    Diplacus aurantiacus

    Eriodictyon californicum

    Heteromeles arbutifolia

    Pinus sabiniana

    buckbrush

    California oatgrass

    orange bush monkeyflower

    California yerba santa

    toyon

    California foothill pine

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

    bedrock, lithic

    very strongly coherent

    48 - 200

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

    mollic epipedon

    argillic horizon

    lithic contact

    0—48

    12—48

    48—200

    —48—

    —36—

    —-
    Site Soil Temperature
    Site Obs. Date Depth Sensor Kind Temperature
    cm C

    4/11/2007

    50

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    20
    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

    35

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    389

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    196

    584

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    215

    18

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    A1—0 to 3 centimeters (0.0 to 1.2 inches); 50 percent very dark grayish brown (10YR 3/2) broken face and 50 percent brown (10YR 4/3) broken face, 50 percent black (10YR 2/1) broken face and 50 percent black (7.5YR 2.5/1) broken face, moist; gravelly loam; 42 percent sand; 41 percent silt; 17 percent clay; moderate fine subangular blocky, and moderate fine granular structure; slightly hard, friable, nonsticky, slightly plastic; moderate permeability; low excavation difficulty; 8.0 very fine roots throughout and 8.0 fine roots throughout; 8.0 very fine irregular and 0.8 very coarse tubular and 3.0 medium tubular and 3.0 fine tubular and 8.0 fine irregular pores; 2 percent by volume nonflat very strongly coherent cemented 75-?-250 millimeter serpentinite fragments and 15 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter serpentinite fragments; noneffervescent; neutral, pH 7.1, hellige-truog; abrupt smooth boundary. Lab sample # 07N03091; slightly moist when described; observed in pit, small
    A2—3 to 12 centimeters (1.2 to 4.7 inches); 50 percent dark grayish brown (10YR 4/2) broken face and 50 percent brown (10YR 4/3) broken face, black (10YR 2/1) broken face, moist; gravelly loam; 40 percent sand; 42 percent silt; 18 percent clay; weak fine subangular blocky, and weak medium subangular blocky structure; slightly hard, friable, nonsticky, slightly plastic; moderate permeability; low excavation difficulty; 3.0 very fine roots throughout and 3.0 medium roots throughout and 3.0 fine roots throughout; 8.0 very fine irregular and 3.0 medium tubular and 8.0 fine irregular and 3.0 fine tubular and 3.0 coarse tubular pores; 2 percent by volume nonflat very strongly coherent cemented 75-?-250 millimeter serpentinite fragments and 15 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter serpentinite fragments; noneffervescent; neutral, pH 7.0, hellige-truog; clear wavy boundary. Lab sample # 07N03092; slightly moist when described; observed in pit, small
    Bt1—12 to 25 centimeters (4.7 to 9.8 inches); brown (10YR 4/3) broken face, very dark brown (10YR 2/2) broken face, moist; gravelly loam; 37 percent sand; 42 percent silt; 21 percent clay; moderate coarse subangular blocky structure; hard, friable, slightly sticky, slightly plastic; moderate permeability; low excavation difficulty; 3.0 very fine roots throughout and 0.8 medium roots throughout and 0.8 fine roots throughout; 3.0 very fine dendritic tubular and 3.0 medium tubular pores; 2 percent faint clay films on all faces of peds and 3 percent faint clay films on surfaces along pores; 5 percent by volume nonflat very strongly coherent cemented 75-?-250 millimeter serpentinite fragments and 25 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter serpentinite fragments; noneffervescent; neutral, pH 7.2, hellige-truog; clear wavy boundary. Lab sample # 07N03093; slightly moist when described; observed in pit, small
    Bt2—25 to 48 centimeters (9.8 to 18.9 inches); brown (10YR 4/3) broken face, very dark brown (10YR 2/2) broken face, moist; very gravelly loam; 33 percent sand; 41 percent silt; 26 percent clay; moderate medium subangular blocky, and moderate fine subangular blocky structure; very hard, firm, moderately sticky, slightly plastic; moderately slow permeability; low excavation difficulty; 3.0 very fine roots throughout and 0.8 medium roots throughout and 0.8 fine roots throughout; 3.0 very fine dendritic tubular and 3.0 fine dendritic tubular pores; 2 percent distinct clay films on surfaces along pores and 15 percent faint clay films on all faces of peds; 15 percent by volume nonflat very strongly coherent cemented 75-?-250 millimeter serpentinite fragments and 30 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter serpentinite fragments; noneffervescent; neutral, pH 6.9, hellige-truog; abrupt wavy boundary. Lab sample # 07N03094; slightly moist when described; observed in pit, small
    Bt3—48 to 66 centimeters (18.9 to 26.0 inches); dark grayish brown (10YR 4/2) broken face, very dark brown (10YR 2/2) broken face, moist; gravelly clay loam; 35 percent sand; 34 percent silt; 31 percent clay; moderate fine subangular blocky structure; very hard, firm, moderately sticky, moderately plastic; moderate permeability; high excavation difficulty; 0.8 coarse roots in cracks; 3.0 very fine dendritic tubular and 3.0 fine dendritic tubular pores; 10 percent distinct clay films on surfaces along pores and 10 percent distinct clay films on all faces of peds; 30 percent by volume nonflat very strongly coherent cemented 2-?-75 millimeter serpentinite fragments; noneffervescent; - 15 - percent of the total horizon; - 15 - percent of the lateral area; neutral, pH 6.8, hellige-truog; abrupt broken boundary.; slightly moist when described; observed in pit, small
    R—48 to 73 centimeters (18.9 to 28.7 inches); bedrock; extremely high excavation difficulty; fragments.; observed in pit, small