IDENTIFIERS

  • Current Taxon Name (Soil Name): Surpur
  • OSD
  • Series Extent
  • User Site ID: S1986CA605REDW007
  • User Pedon ID: S10CA023025
  • Vegetation Plot ID: S1986CA605REDW007
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 10N0696
  • NCSS Pedon Lab Data NASIS Record ID - 58622
  • Print Date: 11/24/2024

    • 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: 41.2481353
  • Std. Longitude: -124.0602730
  • Datum: WGS84
  • Township: 10N
  • Range: 1E
  • Section: 16
  • PLSS Details: northeast quarter, southeast quarter
  • Location Description: Redwood National Park, Humboldt County, California; ne from L-2-2 road; 0.1 miles n of junction with L-2
  • Map Unit: 251—Surpur, 2 to 9 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: 41124-B1—Rodgers Peak, California

    • PEDON

  • Describers Name: Nancy Sturhan
  • Current Taxonomic Class: Fine, mixed, active, isomesic Typic Haplohumults
  • Current Taxon Kind: series
  • Pedon Type: not classified to current taxon name
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 25
  • Correlated Information:
  • Soil Name - Surpur
  • PSC - 46 to 96 cm.
  • Classificaton Date - 4/12/2010
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - udic
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Empire
  • Classificaton Date - 7/28/1986
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: marine deposits derived from mixed sources
  • Landscape: mountains
  • Landform: mountain on uplifted marine terrace
  • Geomorphic Component Mountains: mountaintop
  • Hill Slope Profile: summit
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Marine Sediments formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/28/1986 (actual site observation date)
  • Air Photo ID: 4-22
  • 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
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    PSME

    SESE3

    ALRU2

    GASH

    VAOV2

    RHMA3

    POMU

    IRIS

    PTAQ

    Pseudotsuga menziesii

    Sequoia sempervirens

    Alnus rubra

    Gaultheria shallon

    Vaccinium ovatum

    Rhododendron macrophyllum

    Polystichum munitum

    Iris

    Pteridium aquilinum

    Douglas-fir

    redwood

    red alder

    salal

    California huckleberry

    Pacific rhododendron

    western swordfern

    iris

    western brackenfern

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

    ochric epipedon

    argillic horizon

    0—30

    46—168

    —30—

    —122—
    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

    3

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    345

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    235

    2150

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    280

    11

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    Oi—0 to 2 centimeters (0.0 to 0.8 inches); slightly decomposed plant material; fragments; noneffervescent; abrupt wavy boundary.; dry when described; observed in pit, small
    A1—2 to 14 centimeters (0.8 to 5.5 inches); dark brown (7.5YR 3/4) broken face, brown (7.5YR 5/4) broken face, dry; loam; 22 percent clay; moderate fine granular, and moderate medium subangular blocky, and moderate fine subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; moderate permeability; 6.0 very fine roots and 2.0 medium roots and 6.0 fine roots; 2.0 very fine tubular and 6.0 very fine irregular and 2.0 medium tubular and 2.0 fine tubular pores; 12 percent by volume nonflat rounded very strongly coherent cemented 2-38-75 millimeter mixed fragments; noneffervescent; strongly acid, pH 5.4, bromcresol green; clear wavy boundary. Lab sample # 10N03193; dry when described; observed in pit, small
    A2—14 to 30 centimeters (5.5 to 11.8 inches); dark brown (7.5YR 3/4) broken face, brown (7.5YR 5/4) broken face, dry; loam; 24 percent clay; moderate coarse subangular blocky, and moderate medium subangular blocky structure; soft, friable, slightly sticky, slightly plastic; moderate permeability; 4.0 very fine roots and 2.0 medium roots and 4.0 fine roots and 1.0 coarse roots; 2.0 very fine tubular and 1.0 fine tubular pores; 12 percent by volume nonflat rounded very strongly coherent cemented 2-38-75 millimeter mixed fragments; noneffervescent; strongly acid, pH 5.4, bromcresol green; clear irregular boundary. Lab sample # 10N03194; moist when described; observed in pit, small
    AB—30 to 46 centimeters (11.8 to 18.1 inches); yellowish brown (10YR 5/6) broken face, brownish yellow (10YR 6/6) broken face, dry; silt loam; 26 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; soft, friable, slightly sticky, slightly plastic; moderate permeability; 3.0 very fine roots and 3.0 medium roots and 3.0 fine roots and 3.0 coarse roots; 2.0 very fine tubular and 1.0 medium tubular and 2.0 fine tubular pores; 9 percent by volume nonflat rounded very strongly coherent cemented 2-38-75 millimeter mixed fragments; noneffervescent; strongly acid, pH 5.2, bromcresol green; clear wavy boundary. Lab sample # 10N03195; moist when described; observed in pit, small
    BAt—46 to 64 centimeters (18.1 to 25.2 inches); yellowish brown (10YR 5/8) broken face, brownish yellow (10YR 6/6) broken face, dry; clay loam; 30 percent clay; weak coarse subangular blocky, and weak very coarse subangular blocky structure; soft, friable, moderately sticky, slightly plastic; moderately slow permeability; 1.0 very fine roots and 2.0 medium roots and 1.0 fine roots and 2.0 coarse roots; 2.0 very fine tubular and 1.0 medium tubular and 2.0 fine tubular pores; 2 percent distinct yellowish red (5YR 5/6), moist, clay films on all faces of peds; 7 percent by volume nonflat rounded very strongly coherent cemented 2-38-75 millimeter mixed fragments; noneffervescent; very strongly acid, pH 4.8, bromcresol green; clear wavy boundary. Lab sample # 10N03196; moist when described; observed in pit, small
    Bt—64 to 95 centimeters (25.2 to 37.4 inches); strong brown (7.5YR 5/8) broken face, strong brown (7.5YR 5/8) broken face, dry; clay; 46 percent clay; weak very coarse subangular blocky, and weak coarse subangular blocky structure; hard, very firm, moderately sticky, moderately plastic; slow permeability; 1.0 very fine roots and 1.0 medium roots and 1.0 fine roots and 1.0 coarse roots; 1.0 very fine tubular and 1.0 fine tubular pores; 2 percent faint yellowish red (5YR 5/6), moist, clay films on surfaces along pores and 15 percent distinct yellowish red (5YR 5/6), moist, clay films on all faces of peds; 6 percent by volume nonflat subangular very strongly coherent cemented 2-38-75 millimeter mixed fragments; noneffervescent; very strongly acid, pH 5.0, bromcresol green; abrupt irregular boundary. Lab sample # 10N03197; moist when described; observed in pit, small
    BCt—95 to 168 centimeters (37.4 to 66.1 inches); variegated red (2.5YR 4/8) broken face, red (2.5YR 5/8) broken face, dry; clay loam; 30 percent clay; massive; hard, friable, moderately sticky, slightly plastic; moderately slow permeability; 1.0 very fine roots and 1.0 medium roots and 1.0 fine roots; 1.0 very fine tubular pores; 2 percent faint yellowish red (5YR 5/6), moist, clay films on surfaces along pores and 15 percent distinct yellowish red (5YR 5/6), moist, clay films on all faces of peds; 1 percent by volume nonflat rounded very strongly coherent cemented 2-38-75 millimeter mixed fragments; noneffervescent; very strongly acid, pH 4.8, bromcresol green; abrupt irregular boundary. Lab sample # 10N03198; moist when described; observed in pit, small
    C—168 to 244 centimeters (66.1 to 96.1 inches); variegated brownish yellow (10YR 6/8) broken face and red (2.5YR 4/8) broken face, yellow (10YR 7/6) broken face and red (2.5YR 5/6) broken face, dry; clay loam; 28 percent clay; massive; slightly hard, friable, moderately sticky, slightly plastic; moderately slow permeability; 0.5 very fine roots; 1.0 very fine tubular pores; 1 percent by volume nonflat rounded very strongly coherent cemented 2-38-75 millimeter mixed fragments; noneffervescent; very strongly acid, pH 4.6, bromcresol green. Lab sample # 10N03199; moist when described; observed in pit, small