IDENTIFIERS

  • Current Taxon Name (Soil Name): Ahpah
  • OSD
  • Series Extent
  • User Site ID: S1983CA605REDW002
  • User Pedon ID: S10CA023012
  • Vegetation Plot ID: S1983CA605REDW002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 10N0683
  • NCSS Pedon Lab Data NASIS Record ID - 43151
  • 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: 41.2562256
  • Std. Longitude: -123.9874802
  • Datum: WGS84
  • Township: 10N
  • Range: 2E
  • Section: 18
  • PLSS Details: southwest quarter, northeast quarter
  • Location Description: Redwood National Park, Humboldt County, California; located approximately 0.2 kilometers north on Bald Hills road from C-Line gate, then 69 meters south downhill from road.
  • Map Unit: 548—Lackscreek-Slidecreek-Coppercreek complex, 50 to 75 percent slopes
  • 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: 41123-C8—Holter Ridge, California

    • PEDON

  • Describers Name: Jack Lewis
  • Current Taxonomic Class: Fine-loamy, mixed, active, isomesic Humic Dystrustepts
  • Current Taxon Kind: taxadjunct
  • Pedon Type: within range of map unit
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 12
  • Correlated Information:
  • Soil Name - Ahpah
  • PSC - 25 to 100 cm.
  • Classificaton Date - 4/12/2010
  • Soil Taxonomic Edition - eighth edition
  • Moisture Class - ustic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Ahpah
  • Taxonomic Class - Fine-loamy, mixed, active, isomesic Humic Dystrust
  • Taxon Kind - taxadjunct
  • Classificaton Date - 8/25/1983
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium derived from graywacke and/or residuum weathered from graywacke
  • Landscape: mountains
  • Landform: upper shoulder mountain slope
  • Geomorphic Component Mountains: mountainflank, upper third
  • Hill Slope Profile: shoulder
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: weakly coherent strong weathered graywacke at 100cm
  • Geology: Franciscan Formation formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/25/1983 (actual site observation date)
  • Air Photo ID: 7-50
  • 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

    GASH

    LIDE3

    MANE2

    POMU

    PSME

    RHODO

    SESE3

    TRIEN

    TROV2

    TSHE

    VAOV2

    VAPA

    VAPL

    VIOLA

    GAYLU

    Gaultheria shallon

    Lithocarpus densiflorus

    Mahonia nervosa

    Polystichum munitum

    Pseudotsuga menziesii

    Rhododendron

    Sequoia sempervirens

    Trientalis

    Trillium ovatum

    Tsuga heterophylla

    Vaccinium ovatum

    Vaccinium parvifolium

    Vancouveria planipetala

    Viola

    Gaylussacia

    salal

    tanoak

    Cascade barberry

    western swordfern

    Douglas-fir

    rhododendron

    redwood

    starflower

    Pacific trillium

    western hemlock

    California huckleberry

    red huckleberry

    redwood insideout flower

    violet

    huckleberry

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

    bedrock, paralithic

    —

    70 - 100

    - 30 -

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

    umbric epipedon

    cambic horizon

    paralithic contact

    5—36

    36—70

    70—100

    —31—

    —34—

    —30—
    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

    46

    —

    —

    524

    —

    178

    2400

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    255

    11

    14

    9

    11

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    Oi—0 to 5 centimeters (0.0 to 2.0 inches); slightly decomposed plant material; fragments; clear wavy boundary.; slightly moist when described; observed in cut
    A—5 to 36 centimeters (2.0 to 14.2 inches); brown (10YR 5/3) broken face, dark brown (7.5YR 3/3) broken face, moist; cobbly loam; 26 percent clay; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots and 4.0 medium roots and 0.5 fine roots and 0.5 coarse roots; 0.5 very fine irregular pores; 10 percent by volume 2-38-75 millimeter graywacke fragments and 15 percent by volume 75-163-250 millimeter graywacke fragments; noneffervescent; very strongly acid, pH 5.0, hellige-truog; clear wavy boundary. Lab sample # 10N03124; slightly moist when described; observed in cut
    Bw—36 to 56 centimeters (14.2 to 22.0 inches); brown (7.5YR 5/4) broken face, brown (7.5YR 4/4) broken face, moist; gravelly clay loam; 28 percent clay; moderate coarse subangular blocky parts to strong medium subangular blocky structure; hard, friable, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots and 0.5 coarse roots; 0.5 very fine irregular pores; 4 percent by volume 75-163-250 millimeter graywacke fragments and 12 percent by volume 2-38-75 millimeter graywacke fragments; noneffervescent; very strongly acid, pH 5.0, hellige-truog; clear wavy boundary. Lab sample # 10N03125; slightly moist when described; observed in cut
    CB—56 to 70 centimeters (22.0 to 27.6 inches); light yellowish brown (10YR 6/4) broken face, dark yellowish brown (10YR 4/4) broken face, moist; very gravelly loam; 24 percent clay; weak coarse subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots; 4.0 very fine irregular pores; 10 percent by volume 75-163-250 millimeter graywacke fragments and 30 percent by volume 2-38-75 millimeter graywacke fragments; noneffervescent; very strongly acid, pH 5.0, hellige-truog. Lab sample # 10N03126; slightly moist when described; observed in cut
    Cr—70 to 100 centimeters (27.6 to 39.4 inches); bedrock; fragments.; slightly moist when described; observed in cut