IDENTIFIERS

  • Current Taxon Name (Soil Name): Diamondpeak
  • OSD
  • Series Extent
  • User Site ID: S06CA089003
  • User Pedon ID: 789210
  • Vegetation Plot ID: S06CA089003
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 07N0140
  • NCSS Pedon Lab Data NASIS Record ID - 19128
  • Print Date: 12/10/2025

    • 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: 40.4576944
  • Std. Longitude: -121.5280000
  • Datum: WGS84
  • State: California
  • County: CA089—Shasta
  • MLRA: 22B—Southern Cascade Mountains
  • Non-MLRA Soil Survey Area: CA789—Lassen Volcanic National Park, California
  • 7.5 Minute USGS Quad: 40121-D5—Lassen Peak, California

    • PEDON

  • Describers Name: AEC, GCL
  • Current Taxonomic Class: Fine-loamy, isotic, frigid Typic Dystroxerepts
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Diamondpeak
  • PSC - 28 to 103 cm.
  • Classificaton Date - 4/21/2010
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: tephra over residuum weathered from volcanic rock
  • Landscape: mountains
  • Landform: mountain slope
  • Geomorphic Component Mountains: mountainflank
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: linear
  • Bedrock: metavolcanics
  • Geology: Qabk1 member.
  • Surface Fragments: 15.00 percent nonflat subangular 2- to 75-millimeter mixed, 1.50 percent nonflat subangular 75- to 250-millimeter mixed,
  • Benchmark Soil?: no

    • VEGETATION

  • Ecological Sites. (Click Ecological Site ID For Link to EDIT.)
    Ecological Site ID Ecological Site Name Correlation Data Classifier
    F022BI113CA Frigid Very Deep Loamy Slopes

    • SITE OBSERVATION

  • Observation Date: 9/20/2006 (actual site observation date)
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • 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

    ABMA

    ALCA2

    BASA3

    LUPIN

    PHDI3

    PIMO3

    TSME

    Abies magnifica

    Allium campanulatum

    Balsamorhiza sagittata

    Lupinus

    Phlox diffusa

    Pinus monticola

    Tsuga mertensiana

    California red fir

    dusky onion

    arrowleaf balsamroot

    lupine

    spreading phlox

    western white pine

    mountain hemlock

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    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, paralithic

    very weakly coherent

    125 -

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

    9/20/2006

    50

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    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

    33

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    2355.8

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    180

    2972

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    Oi—0 to 3 centimeters (0.0 to 1.2 inches); slightly decomposed plant material; fragments; abrupt smooth boundary.; dry when described; observed in pit, small
    A—3 to 7 centimeters (1.2 to 2.8 inches); variegated grayish brown (10YR 5/2), very dark grayish brown (10YR 3/2), moist; loam; 20 percent clay; moderate very thick platy structure; slightly hard, friable, slightly sticky, slightly plastic; 3.0 very fine and fine roots and 0.8 medium and coarse roots; 3.0 very fine interstitial and 0.8 fine and medium tubular pores; 1 percent by volume nonflat subangular very strongly coherent cemented 5-12-20 millimeter volcanic, unspecified fragments and 3 percent by volume nonflat subangular very strongly coherent cemented 2-3-5 millimeter volcanic, unspecified fragments; moderately acid, pH 6.0, hellige-truog; abrupt smooth boundary.; dry when described; observed in pit, small
    2Bwb1—7 to 26 centimeters (2.8 to 10.2 inches); variegated very pale brown (10YR 8/4), brownish yellow (10YR 6/6), moist; very gravelly clay loam; 38 percent clay; moderate very fine and fine subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 3.0 very fine to medium roots and 3.0 very fine roots and 0.8 fine and medium roots; 8.0 very fine and fine irregular and 3.0 fine tubular pores; 20 percent by volume nonflat subangular weakly coherent cemented 5-12-20 millimeter volcanic, unspecified fragments and 30 percent by volume nonflat subangular weakly coherent cemented 2-3-5 millimeter volcanic, unspecified fragments; strongly acid, pH 5.5, hellige-truog; abrupt smooth boundary.; dry when described; observed in pit, small
    2Bwb2—26 to 79 centimeters (10.2 to 31.1 inches); variegated 50 percent reddish yellow (7.5YR 8/6) and 50 percent very pale brown (10YR 8/3), reddish yellow (7.5YR 6/8) and yellow (10YR 7/6), moist; very gravelly clay loam; 36 percent clay; moderate fine to coarse subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 0.8 very coarse roots and 0.8 fine to coarse roots; 8.0 very fine and fine irregular and 3.0 fine and medium tubular pores; 25 percent by volume nonflat subangular weakly coherent cemented 2-3-5 millimeter volcanic, unspecified fragments and 30 percent by volume nonflat subangular weakly coherent cemented 5-12-20 millimeter volcanic, unspecified fragments; very strongly acid, pH 5.0, hellige-truog; abrupt irregular boundary.; dry when described; observed in pit, small
    2Bwb3—79 to 125 centimeters (31.1 to 49.2 inches); variegated 70 percent yellow (10YR 7/6) and 30 percent yellow (10YR 8/6), brownish yellow (10YR 6/6) and yellow (10YR 7/6), moist; extremely gravelly clay loam; 32 percent clay; moderate fine and medium subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 3.0 medium roots and 0.8 fine roots; 3.0 very fine and fine irregular and 3.0 fine tubular pores; 30 percent by volume nonflat angular very weakly coherent cemented 2-3-5 millimeter volcanic, unspecified fragments and 40 percent by volume nonflat angular very weakly coherent cemented 5-12-20 millimeter volcanic, unspecified fragments; very strongly acid, pH 5.0, hellige-truog; abrupt smooth boundary.; dry when described; observed in pit, small
    2Bwb4—125 to 152 centimeters (49.2 to 59.8 inches); variegated reddish yellow (7.5YR 6/8), strong brown (7.5YR 5/8), moist; clay loam; 30 percent clay; moderate fine and medium subangular blocky structure; moderately hard, firm, moderately sticky, slightly plastic; 0.8 very coarse roots and 0.8 fine to coarse roots; 3.0 very fine and fine irregular and 0.8 fine tubular pores; fragments; very strongly acid, pH 4.7, hellige-truog.; dry when described; observed in pit, small
    2Cr—125 to 152 centimeters (49.2 to 59.8 inches); variegated white (2.5Y 8/1), white (2.5Y 8/1), moist; bedrock; massive; hard, very firm; 0.8 very coarse roots and 0.8 fine to coarse roots; 3.0 very fine and fine irregular and 0.8 fine tubular pores; very weakly coherent cemented unspecified fragments.; dry when described; observed in pit, small