IDENTIFIERS

  • Current Taxon Name (Soil Name): Mettah
  • OSD
  • Series Extent
  • User Site ID: 03CA605REDW036
  • User Pedon ID: 03CA605REDW036
  • Vegetation Plot ID: 03CA605REDW036
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - NSSL
  • Lab Pedon # - 03N0671
  • NCSS Pedon Lab Data NASIS Record ID - 15725
  • Print Date: 4/29/2025

    • 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: 41.3275556
  • Std. Longitude: -123.9500556
  • Datum: WGS84
  • Township: 11N
  • Range: 2E
  • Section: 21
  • PLSS Details: southwest quarter, northeast quarter
  • Location Description: Redwood National Park, Humboldt County, California; located approximately 8.25 kilometers on Lost Man Creek Trail from trailhead; bankcut.
  • Map Unit: 290—Surpur-Mettah complex, 9 to 30 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: Joe Seney
  • Current Taxonomic Class: Fine, parasesquic, isomesic Andic Haplohumults
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 336
  • Correlated Information:
  • Soil Name - Mettah
  • PSC - 42 to 92 cm.
  • Classificaton Date - 3/5/2012
  • Soil Taxonomic Edition - eighth edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Mettah
  • Classificaton Date - 4/22/2003
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: older silty alluvium derived from mixed lithologies
  • Landscape: mountains
  • Landform: ridge
  • Geomorphic Component Mountains: mountaintop
  • Hill Slope Profile: summit
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: mixed
  • Geology: Prairie Creek Formation formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/22/2003 (actual site observation date)
  • Air Photo ID: 6246-113
  • 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 - intermixed conifers and hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Air Temp - 8
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    GASH

    LIDE3

    PSME

    SESE3

    VAOV2

    Gaultheria shallon

    Lithocarpus densiflorus

    Pseudotsuga menziesii

    Sequoia sempervirens

    Vaccinium ovatum

    salal

    tanoak

    Douglas-fir

    redwood

    California huckleberry

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

    ochric epipedon

    argillic horizon

    0—22

    42—200

    —20—

    —158—
    Site Soil Temperature
    Site Obs. Date Depth Sensor Kind Temperature
    cm C

    4/22/2003

    50

    —

    6
    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

    8

    —

    —

    535

    —

    260

    2300

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    265

    11

    14

    9

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    Oi—0 to 2 centimeters (0.0 to 0.8 inches); slightly decomposed plant material; loose, loose, nonsticky, nonplastic; rapid permeability; 3.0 very fine roots and 3.0 fine roots; fragments; noneffervescent; abrupt smooth boundary. Lab sample # 03N02958; moist when described; observed in cut, beveled
    A—2 to 22 centimeters (0.8 to 8.7 inches); dark brown (7.5YR 3/3) broken face, pale brown (10YR 6/3) broken face, dry; loam; 25 percent clay; weak fine subangular blocky, and weak medium granular structure; soft, very friable, slightly sticky, slightly plastic; moderate permeability; 8.0 very fine roots and 2.0 medium roots and 4.0 fine roots; 2.0 very fine irregular and 10.0 very fine tubular and 10.0 fine tubular and 2.0 fine irregular pores; 1 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; slightly acid, pH 6.4, chlorophenol red; clear wavy boundary. Lab sample # 03N02958; moist when described; observed in cut, beveled
    BA—22 to 42 centimeters (8.7 to 16.5 inches); reddish brown (5YR 4/4) broken face, strong brown (7.5YR 5/6) broken face, dry; silty clay loam; 27 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; moderate permeability; 4.0 very fine roots and 1.0 medium roots and 4.0 fine roots; 6.0 very fine tubular and 1.0 medium tubular and 6.0 fine tubular pores; 1 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; slightly acid, pH 6.2, chlorophenol red; clear wavy boundary. Lab sample # 03N02959; moist when described; observed in cut, beveled
    Bt1—42 to 69 centimeters (16.5 to 27.2 inches); yellowish red (5YR 4/6) broken face, reddish yellow (7.5YR 6/6) broken face, dry; silty clay loam; 33 percent clay; moderate medium subangular blocky, and moderate fine subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; moderate permeability; 4.0 very fine roots and 1.0 medium roots and 2.0 fine roots and 1.0 coarse roots; 6.0 very fine tubular and 1.0 medium tubular and 6.0 fine tubular pores; 25 percent distinct reddish brown (5YR 4/4), moist, clay films on all faces of peds and 25 percent distinct reddish brown (5YR 4/4), moist, clay films on surfaces along pores; 2 percent by volume nonflat angular 2-3-5 millimeter charcoal fragments; noneffervescent; moderately acid, pH 6.0, chlorophenol red; clear wavy boundary. Lab sample # 03N02960; moist when described; observed in cut, beveled
    Bt2—69 to 93 centimeters (27.2 to 36.6 inches); red (2.5YR 4/8) broken face, reddish yellow (5YR 6/8) broken face, dry; silty clay loam; 38 percent clay; moderate medium subangular blocky structure; moderately hard, firm, moderately sticky, moderately plastic; moderately slow permeability; 2.0 very fine roots and 2.0 medium roots and 4.0 fine roots and 1.0 coarse roots; 4.0 very fine tubular and 4.0 fine tubular pores; 50 percent distinct red (2.5YR 5/8), moist, clay films on all faces of peds and 50 percent distinct red (2.5YR 5/8), moist, clay films on surfaces along pores; fragments; noneffervescent; moderately acid, pH 6.0, chlorophenol red; clear wavy boundary. Lab sample # 03N02961; moist when described; observed in cut, beveled
    Bt3—93 to 123 centimeters (36.6 to 48.4 inches); red (2.5YR 4/8) broken face, red (2.5YR 5/8) broken face, dry; silty clay loam; 40 percent clay; moderate medium subangular blocky, and moderate fine subangular blocky structure; moderately hard, firm, moderately sticky, very plastic; moderately slow permeability; 2.0 very fine roots and 2.0 medium roots and 2.0 fine roots and 1.0 coarse roots; 3.0 very fine tubular and 3.0 fine tubular pores; 15 percent distinct red (2.5YR 4/6), moist, clay films on surfaces along pores and 60 percent distinct red (2.5YR 4/6), moist, clay films on all faces of peds; 3 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 6.0, chlorophenol red; clear wavy boundary. Lab sample # 03N02962; moist when described; observed in cut, beveled
    Bt4—123 to 146 centimeters (48.4 to 57.5 inches); red (2.5YR 5/8) broken face, reddish yellow (5YR 6/8) broken face, dry; silty clay; 42 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; moderately hard, firm, moderately sticky, very plastic; moderately slow permeability; 1.0 medium roots and 2.0 fine roots; 2.0 very fine tubular and 2.0 fine tubular pores; 80 percent distinct red (2.5YR 4/6), moist, clay films on all faces of peds and 80 percent distinct red (2.5YR 4/6), moist, clay films on rock fragments; 1 percent by volume nonflat well rounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat well rounded weakly coherent cemented 2-38-75 millimeter mixed fragments and 5 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 5.8, chlorophenol red; gradual wavy boundary. Lab sample # 03N02963; moist when described; observed in cut, beveled
    Bt5—146 to 200 centimeters (57.5 to 78.7 inches); red (2.5YR 5/8) broken face, reddish yellow (5YR 6/8) broken face, dry; gravelly silty clay loam; 37 percent clay; weak coarse subangular blocky structure; moderately hard, firm, moderately sticky, moderately plastic; moderate permeability; 0.5 fine roots; 2.0 very fine tubular and 2.0 fine tubular pores; 70 percent distinct red (2.5YR 4/6), moist, clay films on all faces of peds and 70 percent distinct red (2.5YR 4/6), moist, clay films on rock fragments; 3 percent by volume nonflat well rounded indurated 75-162-250 millimeter mixed fragments and 5 percent by volume nonflat well rounded weakly coherent cemented 2-38-75 millimeter mixed fragments and 5 percent by volume nonflat well rounded weakly coherent cemented 75-162-250 millimeter mixed fragments and 15 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 5.6, chlorophenol red. Lab sample # 03N02964; moist when described; observed in cut, beveled