IDENTIFIERS

  • Current Taxon Name (Soil Name): Scotiabluffs
  • OSD
  • Series Extent
  • User Site ID: S2004CA023013
  • User Pedon ID: 04CA600085
  • Vegetation Plot ID: S2004CA023013
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 05N0135
  • NCSS Pedon Lab Data NASIS Record ID - 18228
  • 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: 40.5177765
  • Std. Longitude: -124.1041641
  • Datum: WGS84
  • Township: 2N
  • Range: 1E
  • Section: 31
  • Location Description: Barnum Timber Ridge Road on south side of the Van Duzen River
  • Map Unit: 351—Scotiabluffs-Oeschger-Rock outcrop complex, 15 to 50 percent slopes
  • State: California
  • County: CA023—Humboldt
  • MLRA: 4B—Coastal Redwood Belt
  • Non-MLRA Soil Survey Area: CA600—Humboldt County, Central Part, California
  • 7.5 Minute USGS Quad: 40124-E1—Hydesville, California

    • PEDON

  • Describers Name: Sue Aszman and Kylee Bennett
  • Current Taxonomic Class: Coarse-loamy, isotic, isomesic Typic Dystrudepts
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 85
  • Correlated Information:
  • Soil Name - Scotiabluffs (flagged as OSD)
  • PSC - 23 to 75 cm.
  • Classificaton Date - 3/5/2012
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - scotiabluffs
  • Classificaton Date - 10/1/2004
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: residuum weathered from sandstone
  • Landscape: mountains
  • Landform: mountain slope
  • Geomorphic Component Mountains: mountainflank, upper third
  • Hill Slope Profile: backslope
  • Slope Position: upper third
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: very high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: very weakly coherent sandstone, unspecified at 98cm with 10 to <45
  • Geology: Scotia Bluff member of the Scotia Bluffs formation in the Wildcat Group group.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/1/2004 (actual site observation date)
  • Air Photo ID: 6247-100
  • Surface Water Kind: none observed
  • Plant Association Name: Redwood-Douglas fir forest
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - conifers
  • 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

    ADPE

    GASH

    HODI

    POMU

    PSME

    RUPA

    SESE3

    VAOV2

    Adiantum pedatum

    Gaultheria shallon

    Holodiscus discolor

    Polystichum munitum

    Pseudotsuga menziesii

    Rubus parviflorus

    Sequoia sempervirens

    Vaccinium ovatum

    northern maidenhair

    salal

    oceanspray

    western swordfern

    Douglas-fir

    thimbleberry

    redwood

    California huckleberry

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

    bedrock, paralithic

    very weakly coherent

    81 - 200

    - 119 -

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

    ochric epipedon

    cambic horizon

    paralithic contact

    0—29

    29—81

    81—200

    —29—

    —52—

    —119—
    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

    64

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    238

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    30

    1520

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    265

    11

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    Oi—0 to 6 centimeters (0.0 to 2.4 inches); slightly decomposed plant material; low excavation difficulty; fragments; very strongly acid, pH 4.8.; observed in cut
    A—6 to 29 centimeters (2.4 to 11.4 inches); very dark grayish brown (10YR 3/2) rubbed, grayish brown (10YR 5/2) rubbed, dry; fine sandy loam; 13 percent clay; moderate very fine subangular blocky structure; soft, very friable, slightly sticky, moderately plastic; low excavation difficulty; 12.0 very fine roots throughout and 1.0 medium roots throughout and 3.0 fine roots throughout and 1.0 coarse roots throughout; 3.0 very fine interstitial and 1.0 fine tubular pores; fragments; strongly acid, pH 5.4, chlorophenol red; clear smooth boundary.; observed in cut
    Bw1—29 to 60 centimeters (11.4 to 23.6 inches); very dark grayish brown (10YR 3/2) rubbed, light brownish gray (10YR 6/2) rubbed, dry; fine sandy loam; 13 percent clay; moderate fine subangular blocky structure; soft, very friable, slightly sticky, moderately plastic; low excavation difficulty; 7.0 very fine roots throughout and 2.0 medium roots throughout and 2.0 fine roots throughout; 2.0 very fine interstitial and 3.0 fine tubular pores; fragments; strongly acid, pH 5.5, chlorophenol red; gradual smooth boundary.; observed in cut
    Bw2—60 to 81 centimeters (23.6 to 31.9 inches); dark brown (7.5YR 3/3) broken face, brown (10YR 5/3) broken face, dry; fine sandy loam; 16 percent clay; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, moderately plastic; low excavation difficulty; 7.0 very fine roots throughout and 1.0 medium roots throughout and 2.0 fine roots throughout and 1.0 coarse roots throughout; 1.0 very fine interstitial and 1.0 fine tubular pores; fragments; strongly acid, pH 5.3, chlorophenol red; abrupt wavy boundary.; observed in cut
    Cr1—81 to 98 centimeters (31.9 to 38.6 inches); 85 percent olive brown (2.5Y 4/3) broken face and 15 percent dark yellowish brown (10YR 4/4) broken face, 85 percent light brownish gray (2.5Y 6/2) broken face and 15 percent yellowish brown (10YR 5/4) broken face, dry; fine sandy loam; 14 percent clay; massive; moderately hard, very firm, very weakly coherent, nonsticky, nonplastic; very high excavation difficulty; 3.0 very fine roots top of horizon and 1.0 medium roots top of horizon; 0.5 very fine interstitial pores; fragments; moderately acid, pH 5.6, chlorophenol red; abrupt wavy boundary.; observed in cut
    Cr2—98 to 200 centimeters (38.6 to 78.7 inches); 85 percent light brownish gray (2.5Y 6/2) broken face and 15 percent yellowish brown (10YR 5/4) broken face, 85 percent gray (2.5Y 6/1) broken face and 15 percent dark yellowish brown (10YR 4/4) broken face, dry; fine sandy loam; 8 percent clay; massive; moderately hard, very firm, very weakly coherent, nonsticky, nonplastic; very high excavation difficulty; 15.0 very fine roots top of horizon and 1.0 fine roots top of horizon; 0.5 very fine interstitial pores; fragments; slightly acid, pH 6.2, chlorophenol red.; observed in cut