IDENTIFIERS

  • Current Taxon Name (Soil Name): Darkwoods
  • OSD
  • Series Extent
  • User Site ID: 01CA023605624
  • User Pedon ID: 01CA023605624
  • Vegetation Plot ID: 01CA023605624
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 02N0572
  • NCSS Pedon Lab Data NASIS Record ID - 14931
  • Print Date: 12/4/2024

    • 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: 41.0942222
  • Std. Longitude: -123.6613333
  • Datum: WGS84
  • Township: 9N
  • Range: 4E
  • Section: 12
  • Location Description: Hoopa Tribal Lands, Humboldt County, California; Big Hill Road to first left turn, go up across the ridge, 0.7 kilometers from the south crest of the ridge and up the bank to the next adjacent road cut.
  • Map Unit: 705—Darkwoods-Firmountain-Redtop complex, 30 to 50 percent slopes
  • State: California
  • County: CA023—Humboldt
  • MLRA: 5—Siskiyou-Trinity Area
  • Non-MLRA Soil Survey Area: CA605—Humboldt and Del Norte Area, California
  • 7.5 Minute USGS Quad: 41123-A6—Hoopa, California

    • PEDON

  • Describers Name: William Reed $ Ricardo Velarde
  • Current Taxonomic Class: Loamy-skeletal, mixed, semiactive, mesic Xeric Haplohumults
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 1624
  • Correlated Information:
  • Soil Name - Darkwoods
  • PSC - 18 to 68 cm.
  • Classificaton Date - 2/3/2012
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - xeric
  • Moisture Subclass - xeric
  • Sampled As Information:
  • Soil Name - Darkwoods
  • Classificaton Date - 4/10/2001
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium and residuum derived from phyllite
  • Landscape: mountains
  • Landform: mountain slope
  • Geomorphic Component Mountains: mountainflank
  • Hill Slope Profile: backslope
  • Slope Complexity: complex
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Geology: Galice formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/10/2001 (actual site observation date)
  • Air Photo ID: 6250-114
  • Surface Water Kind: none observed
  • 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

    GASH

    LIDE3

    POMU

    PSME

    VAOV2

    Gaultheria shallon

    Lithocarpus densiflorus

    Polystichum munitum

    Pseudotsuga menziesii

    Vaccinium ovatum

    salal

    tanoak

    western swordfern

    Douglas-fir

    California huckleberry

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

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

    ochric epipedon

    argillic horizon

    0—18

    18—170

    —18—

    —152—
    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

    48

    —

    —

    680

    —

    340

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Oi—0 to 8 centimeters (0.0 to 3.1 inches); black (10YR 2/1) broken face, very dark gray (10YR 3/1) broken face, dry; slightly decomposed plant material; loose, loose, nonsticky, nonplastic; moderately rapid permeability; 10.0 very fine roots; 2.0 fine irregular pores; fragments; abrupt smooth boundary.; moist when described; observed in pit, small
    A—8 to 18 centimeters (3.1 to 7.1 inches); brown (7.5YR 4/4) broken face, yellowish brown (10YR 5/4) broken face, dry; very channery silt loam; 18 percent clay; moderate fine granular structure; soft, very friable, nonsticky, nonplastic; moderate permeability; 4.0 very fine roots and 2.0 medium roots and 2.0 fine roots and 3.0 coarse roots; 10.0 fine interstitial pores; 35 percent by volume flat subangular strongly coherent cemented 2-38-75 millimeter phyllite fragments; strongly acid, pH 5.3, pH meter; clear wavy boundary. Lab sample # 02N02835; moist when described; observed in pit, small
    Bt1—18 to 40 centimeters (7.1 to 15.7 inches); dark yellowish brown (10YR 4/4) broken face, light yellowish brown (10YR 6/4) broken face, dry; very channery silt loam; 26 percent clay; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate permeability; 3.0 very fine roots and 2.0 medium roots and 1.0 fine roots; 5.0 fine interstitial pores; 10 percent faint clay films on all faces of peds; 35 percent by volume flat subangular strongly coherent cemented 2-38-75 millimeter phyllite fragments; moderately acid, pH 5.9, pH meter; clear smooth boundary. Lab sample # 02N02836; moist when described; observed in pit, small
    Bt2—40 to 78 centimeters (15.7 to 30.7 inches); strong brown (7.5YR 4/6) broken face, brownish yellow (10YR 6/6) broken face, dry; very channery loam; 23 percent clay; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate permeability; 2.0 very fine roots and 0.5 medium roots and 0.5 fine roots; 1.0 fine tubular pores; 10 percent faint clay films on all faces of peds; 35 percent by volume flat subangular strongly coherent cemented 2-38-75 millimeter phyllite fragments; moderately acid, pH 5.9, pH meter; clear smooth boundary. Lab sample # 02N02837; moist when described; observed in pit, small
    Bt3—78 to 101 centimeters (30.7 to 39.8 inches); strong brown (7.5YR 4/6) broken face, reddish yellow (7.5YR 7/6) broken face, dry; very channery loam; 24 percent clay; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate permeability; 0.2 very fine roots and 1.0 medium roots and 0.2 fine roots; 1.0 fine tubular pores; 20 percent faint clay films on all faces of peds; 50 percent by volume flat subangular strongly coherent cemented 2-38-75 millimeter phyllite fragments; moderately acid, pH 5.6, pH meter; clear smooth boundary. Lab sample # 02N02838; moist when described; observed in pit, small
    Bt4—101 to 134 centimeters (39.8 to 52.8 inches); strong brown (7.5YR 4/6) broken face, reddish yellow (7.5YR 7/6) broken face, dry; very channery loam; 19 percent clay; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate permeability; 0.2 medium roots and 0.2 fine roots; 1.0 fine tubular pores; 10 percent faint clay films on all faces of peds; 50 percent by volume flat subangular strongly coherent cemented 2-38-75 millimeter phyllite fragments; moderately acid, pH 5.6, pH meter; clear smooth boundary. Lab sample # 02N02839; moist when described; observed in pit, small
    Bt5—134 to 170 centimeters (52.8 to 66.9 inches); yellowish brown (10YR 5/6) broken face, very pale brown (10YR 7/4) broken face, dry; very channery loam; 18 percent clay; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; moderate permeability; 0.2 medium roots and 0.2 fine roots; 1.0 fine tubular pores; 10 percent faint clay films on all faces of peds; 50 percent by volume flat subangular strongly coherent cemented 2-38-75 millimeter phyllite fragments; moderately acid, pH 5.7, pH meter. Lab sample # 02N02840; moist when described; observed in pit, small