IDENTIFIERS

  • Current Taxon Name (Soil Name): Ossagon
  • OSD
  • Series Extent
  • User Site ID: S2003CA605REDW030
  • User Pedon ID: 03CA605REDW030
  • Vegetation Plot ID: 03CA605REDW030
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 03N0670
  • NCSS Pedon Lab Data NASIS Record ID - 15724
  • Print Date: 4/26/2025

    • 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: 41.3271942
  • Std. Longitude: -123.9680862
  • Datum: WGS84
  • Township: 11N
  • Range: 2E
  • Section: 20
  • PLSS Details: southwest quarter, northeast quarter
  • Location Description: Redwood National Park, Humboldt County, California; located approximately 5.4 kilometers on Lost Man Creek Trail from trailhead; bankcut.
  • State: California
  • County: CA023—Humboldt
  • MLRA: 4B—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-loamy, mixed, superactive, isomesic Typic Palehumults
  • Current Taxon Kind: taxadjunct
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 330
  • Correlated Information:
  • Soil Name - Ossagon
  • PSC - 40 to 90 cm.
  • Classificaton Date - 6/6/2012
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Ossagon
  • Classificaton Date - 4/14/2003
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: older alluvium derived from mixed lithologies
  • Landscape: mountains
  • Landform: shoulder of spur ridge on mountain slope
  • Geomorphic Component Mountains: mountainflank
  • Hill Slope Profile: shoulder
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: low
  • 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: 4/14/2003 (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 - 6
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    LIDE3

    LIDE3

    PSME

    PSME

    RHMA3

    RHMA3

    SESE3

    SESE3

    VAOV2

    VAOV2

    Lithocarpus densiflorus

    Lithocarpus densiflorus

    Pseudotsuga menziesii

    Pseudotsuga menziesii

    Rhododendron macrophyllum

    Rhododendron macrophyllum

    Sequoia sempervirens

    Sequoia sempervirens

    Vaccinium ovatum

    Vaccinium ovatum

    tanoak

    tanoak

    Douglas-fir

    Douglas-fir

    Pacific rhododendron

    Pacific rhododendron

    redwood

    redwood

    California huckleberry

    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—23

    23—197

    —23—

    —174—
    Site Soil Temperature
    Site Obs. Date Depth Sensor Kind Temperature
    cm C

    4/14/2003

    50

    —

    7
    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

    10

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    400

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    170

    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; 4.0 very fine roots and 4.0 fine roots; fragments; noneffervescent; abrupt wavy boundary. Lab sample # 03N02949; moist when described; observed in cut, beveled
    A1—2 to 7 centimeters (0.8 to 2.8 inches); dark brown (7.5YR 3/3) broken face, dark brown (10YR 3/3) broken face, dry; loam; 15 percent clay; weak fine granular, and weak medium granular structure; soft, very friable, slightly sticky, slightly plastic; moderate permeability; 8.0 very fine roots and 4.0 fine roots; 4.0 very fine irregular and 8.0 very fine tubular and 8.0 fine tubular and 4.0 fine irregular pores; 1 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; slightly acid, pH 6.2; clear wavy boundary. Lab sample # 03N02950; moist when described; observed in cut, beveled
    A2—7 to 23 centimeters (2.8 to 9.1 inches); dark brown (7.5YR 3/3) broken face, yellowish brown (10YR 5/4) broken face, dry; loam; 17 percent clay; weak medium granular, and weak fine granular structure; soft, very friable, slightly sticky, slightly plastic; moderate permeability; 6.0 very fine roots and 2.0 very coarse roots and 2.0 fine roots; 8.0 very fine tubular and 4.0 very fine irregular and 8.0 fine tubular and 4.0 fine irregular pores; 1 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 6.0; clear smooth boundary. Lab sample # 03N02951; moist when described; observed in cut, beveled
    BA—23 to 40 centimeters (9.1 to 15.7 inches); brown (7.5YR 4/4) broken face, light brown (7.5YR 6/4) broken face, dry; silt loam; 19 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, friable, slightly sticky, moderately plastic; moderate permeability; 4.0 very fine roots and 0.5 medium roots and 3.0 fine roots; 4.0 very fine tubular and 2.0 very fine irregular and 4.0 fine tubular and 2.0 fine irregular pores; 2 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 6.0; gradual wavy boundary. Lab sample # 03N02952; moist when described; observed in cut, beveled
    Bt1—40 to 72 centimeters (15.7 to 28.3 inches); yellowish red (5YR 4/6) broken face, strong brown (7.5YR 5/6) broken face, dry; silt loam; 26 percent clay; moderate medium subangular blocky, and moderate fine subangular blocky structure; slightly hard, friable, moderately sticky, slightly plastic; moderate permeability; 4.0 very fine roots and 1.0 medium roots and 4.0 fine roots and 1.0 coarse roots; 4.0 very fine tubular and 2.0 very fine irregular and 4.0 fine tubular and 2.0 fine irregular pores; 20 percent distinct brown (7.5YR 4/4), moist, clay films on all faces of peds and 20 percent distinct brown (7.5YR 4/4), moist, clay films on surfaces along pores; fragments; noneffervescent; moderately acid, pH 5.8; clear wavy boundary. Lab sample # 03N02953; moist when described; observed in cut, beveled
    Bt2—72 to 98 centimeters (28.3 to 38.6 inches); yellowish brown (10YR 5/6) broken face, yellow (10YR 7/6) broken face, dry; silt loam; 23 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 1.0 very fine roots and 1.0 very coarse roots and 1.0 medium roots and 2.0 fine roots and 1.0 coarse roots; 2.0 very fine tubular and 1.0 very fine irregular and 2.0 fine tubular pores; 5 percent faint brown (7.5YR 4/4), moist, clay films on all faces of peds; fragments; noneffervescent; moderately acid, pH 5.8; gradual wavy boundary. Lab sample # 03N02954; moist when described; observed in cut, beveled
    Bt3—98 to 129 centimeters (38.6 to 50.8 inches); yellowish brown (10YR 5/6) broken face and strong brown (7.5YR 5/6) broken face, brownish yellow (10YR 6/6) broken face, dry; silt loam; 23 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 1.0 very fine roots and 0.5 fine roots; 3.0 very fine tubular and 1.0 medium tubular and 3.0 fine tubular pores; 5 percent distinct light yellowish brown (10YR 6/4), moist, clay films on all faces of peds; fragments; noneffervescent; moderately acid, pH 5.8; gradual wavy boundary. Lab sample # 03N02955; moist when described; observed in cut, beveled
    Bt4—129 to 163 centimeters (50.8 to 64.2 inches); strong brown (7.5YR 5/6) broken face, yellow (10YR 7/6) broken face, dry; silty clay loam; 28 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, moderately plastic; moderate permeability; 1.0 very fine roots and 0.5 fine roots; 3.0 very fine tubular and 2.0 very fine irregular and 3.0 fine tubular and 2.0 fine irregular pores; 5 percent distinct brown (7.5YR 4/4), moist, clay films on all faces of peds and 15 percent distinct brown (7.5YR 4/4), moist, clay films on surfaces along pores; 1 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments and 1 percent by volume nonflat well rounded indurated 75-162-250 millimeter mixed fragments; noneffervescent; moderately acid, pH 5.8; gradual wavy boundary. Lab sample # 03N02956; moist when described; observed in cut, beveled
    Bt5—163 to 197 centimeters (64.2 to 77.6 inches); strong brown (7.5YR 5/6) broken face, reddish yellow (7.5YR 6/6) broken face, dry; silty clay loam; 30 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, moderately plastic; moderate permeability; 0.5 very fine roots and 0.5 fine roots; 2.0 very fine tubular and 2.0 very fine irregular and 2.0 fine tubular and 2.0 fine irregular pores; 20 percent distinct yellowish red (5YR 4/6), moist, clay films on all faces of peds and 20 percent distinct yellowish red (5YR 4/6), moist, clay films on surfaces along pores; 1 percent by volume nonflat well rounded indurated 75-162-250 millimeter mixed fragments and 3 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 5.6; clear wavy boundary. Lab sample # 03N02957; moist when described; observed in cut, beveled
    BCt—197 to 250 centimeters (77.6 to 98.4 inches); yellowish brown (10YR 5/6) broken face, yellow (2.5Y 7/6) broken face and yellow (10YR 7/6) broken face, dry; sand; 2 percent clay; structureless massive; loose, loose, nonsticky, nonplastic; rapid permeability; 0.5 very fine roots and 0.5 fine roots; 10.0 very fine interstitial and 5.0 fine interstitial pores; 10 percent distinct yellowish red (5YR 4/6), moist, clay films between sand grains and 90 percent distinct yellowish red (5YR 4/6), moist, clay films on rock fragments; 2 percent by volume nonflat well rounded indurated 75-162-250 millimeter mixed fragments and 10 percent by volume nonflat well rounded indurated 2-38-75 millimeter mixed fragments; noneffervescent; moderately acid, pH 5.6.; moist when described; observed in cut, beveled