IDENTIFIERS

  • Current Taxon Name (Soil Name): Chalkmountain
  • OSD
  • Series Extent
  • User Site ID: 08CA601982
  • User Pedon ID: 08CA601982
  • Vegetation Plot ID: 08CA601982
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Pedon # - 09N0109
  • NCSS Pedon Lab Data NASIS Record ID - 20250
  • 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: 40.4271667
  • Std. Longitude: -123.8182778
  • Datum: WGS84
  • Location Description: Barnwell ranch, east of pond and putting green
  • Map Unit: 4412—Hoagland-Chalkmountain-Pasturerock complex 15 to 30 percent slopes
  • State: California
  • County: CA023—Humboldt
  • MLRA: 4B—Coastal Redwood Belt
  • Non-MLRA Soil Survey Area: CA601—Humboldt County, South Part, California
  • 7.5 Minute USGS Quad: 40123-D7—Bridgeville, California

    • PEDON

  • Describers Name: Jonathan W. Hooper
  • Current Taxonomic Class: Loamy-skeletal, isotic, mesic Pachic Humixerepts
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 982
  • Correlated Information:
  • Soil Name - Chalkmountain (flagged as OSD)
  • PSC - 27 to 102 cm.
  • Classificaton Date - 3/29/2013
  • Classifier - Jonathan Hooper
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Chalkmountain
  • Classificaton Date - 6/19/2008
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium derived from mudstone and/or colluvium derived from sandstone and/or residuum weathered from mudstone and/or residuum weathered from sandstone
  • Landscape: mountains
  • Landform: mountain slope
  • Geomorphic Component Mountains: mountainflank, upper third
  • Slope Complexity: complex
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: strongly coherent sandstone, unspecified
  • Geology: Cm1 member of the Franciscan Complex formation in the Central Belt. Franciscan-melange group.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/19/2008 (actual site observation date)
  • Air Photo ID: 6248-34
  • Plant Association Name: Douglas-fir-oak
  • 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

    QUGA4

    Pseudotsuga menziesii

    Quercus garryana

    Douglas-fir

    Oregon white oak

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

    mollic epipedon

    cambic horizon

    2—115

    100—145

    50—75—100

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

    6/19/2008

    50

    —

    10
    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

    35

    —

    —

    690

    —

    0

    1780

    —

    260

    13

    —

    —

    10

    —

    —

    —

    —

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    Oi—0 to 2 centimeters (0.0 to 0.8 inches);, black (10YR 2/1), moist; slightly decomposed plant material; nonsticky, nonplastic; low excavation difficulty; fragments; noneffervescent; moderately acid, pH 6.0; abrupt smooth boundary.; very dry when described; observed in pit, small
    A1—2 to 20 centimeters (0.8 to 7.9 inches); very dark grayish brown (10YR 3/2), black (10YR 2/1), moist; very gravelly loam; 15 percent clay; weak fine granular structure; slightly hard, very friable, nonsticky, nonplastic; moderate excavation difficulty; 3.0 very fine roots throughout and 3.0 fine roots throughout; 45 percent by volume nonflat angular strongly coherent cemented 2-25-75 millimeter sandstone, unspecified fragments; 0.12 percent of Vol moisture; noneffervescent; slightly acid, pH 6.4; clear smooth boundary.; slightly dry when described; observed in pit, small
    A2—20 to 67 centimeters (7.9 to 26.4 inches); very dark grayish brown (10YR 3/2), black (10YR 2/1), moist; very gravelly loam; 16 percent clay; weak fine granular structure; slightly hard, very friable, nonsticky, nonplastic; moderate excavation difficulty; 3.0 very fine roots throughout and 1.0 medium roots throughout and 2.0 fine roots throughout; 1.0 very fine tubular pores; 40 percent by volume nonflat angular strongly coherent cemented 2-25-75 millimeter sandstone, unspecified fragments; 0.13 percent of Vol moisture; noneffervescent; slightly acid, pH 6.2; gradual smooth boundary.; slightly moist when described; observed in pit, small
    A3—67 to 100 centimeters (26.4 to 39.4 inches); very dark grayish brown (2.5Y 3/2), black (10YR 2/1), moist; very gravelly loam; 16 percent clay; weak fine granular structure; slightly hard, very friable, nonsticky, nonplastic; moderate excavation difficulty; 2.0 very fine roots throughout; 0.5 very fine tubular pores; 40 percent by volume nonflat angular strongly coherent cemented 2-25-75 millimeter sandstone, unspecified fragments; 1 to 1 percent krotovinas (volume percent); 1 to 1 percent krotovinas (lateral area percent); noneffervescent; slightly acid, pH 6.2; gradual smooth boundary.; slightly moist when described; observed in pit, small
    Bw—100 to 115 centimeters (39.4 to 45.3 inches); dark grayish brown (2.5Y 4/2), black (10YR 2/1), moist; very gravelly loam; 16 percent clay; weak fine granular structure; slightly hard, very friable, nonsticky, nonplastic; moderate excavation difficulty; 5 percent distinct clay films on rock fragments; 50 percent by volume nonflat angular strongly coherent cemented 2-25-75 millimeter sandstone, unspecified fragments; 0.09 percent of Vol moisture; noneffervescent; slightly acid, pH 6.2; clear wavy boundary.; slightly moist when described; observed in pit, small. patchy - phpvsfiid 413109; patchy - phpvsfiid 413109
    C1—115 to 145 centimeters (45.3 to 57.1 inches); light olive brown (2.5Y 5/3), very dark brown (10YR 2/2), moist; extremely gravelly loam; 15 percent clay; structureless massive; soft, loose, nonsticky, nonplastic; moderate excavation difficulty; 60 percent by volume nonflat angular strongly coherent cemented 2-25-75 millimeter sandstone, unspecified fragments; 0.07 percent of Vol moisture; 1 to 1 percent krotovinas (volume percent); 1 to 1 percent krotovinas (lateral area percent); noneffervescent; moderately acid, pH 5.8; gradual wavy boundary.; slightly moist when described; observed in pit, small
    C2—145 to 170 centimeters (57.1 to 66.9 inches); brown (10YR 4/3), light yellowish brown (2.5Y 6/3), moist; extremely gravelly sandy loam; 12 percent clay; structureless massive; soft, loose, nonsticky, nonplastic; moderate excavation difficulty; 70 percent by volume nonflat angular strongly coherent cemented 2-25-75 millimeter sandstone, unspecified fragments; 0.09 percent of Vol moisture; noneffervescent; moderately acid, pH 5.8.; slightly moist when described; observed in pit, small