IDENTIFIERS

  • Current Taxon Name (Soil Name): Weitchpec
  • OSD
  • Series Extent
  • User Site ID: S1984CA605REDW029
  • User Pedon ID: S10CA023010
  • Vegetation Plot ID: S1984CA605REDW029
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 10N0681
  • NCSS Pedon Lab Data NASIS Record ID - 43149
  • Print Date: 11/21/2024

    • 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: 41.7632553
  • Std. Longitude: -124.0361217
  • Datum: WGS84
  • Township: 16N
  • Range: 1E
  • Section: 23
  • Location Description: Redwood National & State Parks, Del Norte County, California; lichen plot #7; 30 ft 15 ft wnw of tree #66
  • Map Unit: 760—Jayel-Walnett-Oragran complex, 9 to 30 percent slope, extremely stony
  • State: California
  • County: CA023—Humboldt
  • MLRA: 4—California Coastal Redwood Belt
  • Non-MLRA Soil Survey Area: CA605—Humboldt and Del Norte Area, California
  • 7.5 Minute USGS Quad: 41124-G1—Hiouchi, California

    • PEDON

  • Describers Name: Jim Popenoe & Mark Alpert
  • Current Taxonomic Class: Loamy-skeletal, magnesic, superactive, mesic Lithic Haploxerepts
  • Current Taxon Kind: series
  • Pedon Type: not classified to current taxon name
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 10
  • Correlated Information:
  • Soil Name - Weitchpec
  • PSC - 25 to 66 cm.
  • Classificaton Date - 4/12/2010
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: residuum weathered from serpentinite
  • Landscape: mountains
  • Landform: broad ridge
  • Geomorphic Component Mountains: mountaintop
  • Hill Slope Profile: summit
  • 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 moderate weathered serpentinite with 10 to <45
  • Surface Fragments: 5.00 percent nonflat subangular very strongly coherent cemented 2- to 75-millimeter serpentinite, 1.00 percent nonflat subangular very strongly coherent cemented 250- to 600-millimeter serpentinite, 1.00 percent nonflat subangular very strongly coherent cemented 600- to 1000-millimeter serpentinite, 3.00 percent nonflat subangular very strongly coherent cemented 75- to 250-millimeter serpentinite,
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/22/1984 (actual site observation date)
  • Surface Water Kind: none observed
  • Plant Association Name: Douglas-fir forest
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - intermixed conifers and hardwoods
  • 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

    ARNE

    ARPA6

    PSME

    Arctostaphylos nevadensis

    Arctostaphylos patula

    Pseudotsuga menziesii

    pinemat manzanita

    greenleaf manzanita

    Douglas-fir

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

    bedrock, paralithic

    moderately coherent

    66 - 83

    - 17 -

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

    ochric epipedon

    cambic horizon

    paralithic contact

    0—18

    29—66

    66—83

    —15—

    —37—

    —17—
    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

    7

    —

    —

    588

    —

    190

    2400

    —

    200

    11

    14

    7

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 15 centimeters (0.0 to 5.9 inches); yellowish red (5YR 5/6) broken face, yellowish red (5YR 4/6) broken face, moist; gravelly loam; 25 percent clay; moderate medium subangular blocky, and moderate medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 5.0 very fine roots and 5.0 medium roots and 5.0 fine roots and 1.0 coarse roots; 3.0 very fine interstitial and 2.0 medium tubular and 3.0 fine interstitial and 2.0 fine tubular pores; 20 percent by volume nonflat subangular very strongly coherent cemented 2-38-75 millimeter serpentinite fragments; noneffervescent; slightly acid, pH 6.5, hellige-truog; gradual smooth boundary. Lab sample # 10N03114; moist when described; observed in pit, small
    AB—15 to 29 centimeters (5.9 to 11.4 inches); yellowish red (5YR 5/6) broken face, yellowish red (5YR 4/6) broken face, moist; very cobbly clay loam; 28 percent clay; weak fine subangular blocky, and weak medium granular, and weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 2.0 very fine roots and 3.0 medium roots and 3.0 fine roots and 2.0 coarse roots; 2.0 very fine interstitial and 2.0 medium tubular and 2.0 fine tubular and 2.0 fine interstitial pores; 15 percent by volume nonflat subangular very strongly coherent cemented 75-162-250 millimeter serpentinite fragments and 26 percent by volume nonflat subangular very strongly coherent cemented 2-38-75 millimeter serpentinite fragments; noneffervescent; neutral, pH 7.0, hellige-truog; gradual wavy boundary. Lab sample # 10N03115; moist when described; observed in pit, small
    Bw—29 to 46 centimeters (11.4 to 18.1 inches); reddish yellow (7.5YR 6/6) broken face, strong brown (7.5YR 5/6) broken face, moist; very stony clay loam; 30 percent clay; massive; hard, friable, slightly sticky, slightly plastic; moderate permeability; 2.0 very fine roots and 1.0 medium roots and 2.0 fine roots and 2.0 coarse roots; 2.0 very fine tubular and 2.0 medium tubular and 2.0 fine tubular pores; 11 percent by volume nonflat subangular very strongly coherent cemented 2-38-75 millimeter serpentinite fragments and 33 percent by volume nonflat subangular very strongly coherent cemented 250-425-600 millimeter serpentinite fragments; noneffervescent; neutral, pH 7.0, hellige-truog; clear wavy boundary. Lab sample # 10N03116; moist when described; observed in pit, small
    C—46 to 66 centimeters (18.1 to 26.0 inches); reddish yellow (7.5YR 6/6) broken face, strong brown (7.5YR 5/6) broken face, moist; extremely stony clay loam; 32 percent clay; moderate coarse subangular blocky parts to moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 1.0 very fine roots and 1.0 medium roots and 2.0 fine roots and 1.0 coarse roots; 2.0 very fine tubular and 2.0 fine tubular pores; 10 percent by volume nonflat subangular very strongly coherent cemented 2-38-75 millimeter serpentinite fragments and 58 percent by volume nonflat subangular very strongly coherent cemented 250-425-600 millimeter serpentinite fragments; noneffervescent; neutral, pH 7.0, hellige-truog; abrupt irregular boundary.; moist when described; observed in pit, small
    Cr—66 to 83 centimeters (26.0 to 32.7 inches); bedrock; fragments.; observed in pit, small