IDENTIFIERS

  • Current Taxon Name (Soil Name): Altamont
  • OSD
  • Series Extent
  • User Site ID: 93CA011001
  • User Pedon ID: 93CA011001
  • Vegetation Plot ID: 93CA011001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 94P0049
  • Print Date: 11/13/2024

    • 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: 39.3455556
  • Std. Longitude: -122.3230556
  • Datum: WGS84
  • Map Unit: 215—Altamont-Sehorn complex, 15 to 30 percent slopes
  • State: California
  • County: CA011—Colusa
  • MLRA: 17—Sacramento and San Joaquin Valleys
  • Non-MLRA Soil Survey Area: CA011—Colusa County, California
  • 7.5 Minute USGS Quad: 39122-C3—Sites, California

    • PEDON

  • Describers Name: Joe Jahnke, Bill Reed, and Maxine Levin
  • Current Taxonomic Class: Fine, smectitic, thermic Typic Haploxererts
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: research site
  • Pedon Record Orgin: Converted from PDP 3.x
  • Correlated Information:
  • Soil Name - Altamont
  • PSC - 25 to 100 cm.
  • Classificaton Date - 11/9/2005
  • Soil Taxonomic Edition - seventh edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Altamont Low
  • Classificaton Date - 9/21/1993
  • Dynamic Soil Properties:
  • Erosion Class - 3
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: hills
  • Landform: hillside
  • Anthropogenic Feature: leveled land
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Bedrock: s moderate weathered mudstone with <10 and a strike of 190 degrees and a dip of 90 to 90 degrees
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/21/1993 (actual site observation date)
  • Microrelief Elevation: 0
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    MEPO3

    Medicago polymorpha

    burclover

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    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

    278

    163

    450

    —

    315

    170

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    —

    —

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    Colusa SW

    —
    A—0 to 14 centimeters (0.0 to 5.5 inches); olive brown (2.5Y 4/4) exterior, olive brown (2.5Y 4/4) exterior, moist; clay; 40 percent clay; moderate coarse subangular blocky, and weak fine subangular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; 3.0 very fine roots throughout; 0.5 very fine low-continuity tubular pores; 1 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 94P0423; observed in trench. Polygon #1B
    Bw—14 to 35 centimeters (5.5 to 13.8 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 45 percent clay; strong coarse and very coarse angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; 0.5 very fine roots throughout; 0.5 very fine low-continuity tubular pores; 2 percent prominent olive brown (2.5Y 4/3), moist, slickensides (pedogenic) on faces of peds; 1 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; gradual wavy boundary. Lab sample # 94P0424; observed in trench. Polygon #2B; patchy - phpvsfiid 207389; patchy - phpvsfiid 207389
    Bss1—35 to 72 centimeters (13.8 to 28.3 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 45 percent clay; strong coarse and very coarse angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; 0.5 very fine roots throughout; 0.5 very fine low-continuity tubular pores; 60 percent prominent olive brown (2.5Y 4/3), moist, slickensides (pedogenic) on faces of peds and 70 percent prominent olive brown (2.5Y 4/3), moist, pressure faces on faces of peds; 1 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; gradual wavy boundary. Lab sample # 94P0425; observed in trench. Polygon #7; continuous - phpvsfiid 207390; patchy - phpvsfiid 207391; continuous - phpvsfiid 207390; patchy - phpvsfiid 207391
    Bss2—72 to 96 centimeters (28.3 to 37.8 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 45 percent clay; strong coarse and very coarse angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; 0.5 very fine roots throughout; 0.5 very fine low-continuity tubular pores; 60 percent prominent olive brown (2.5Y 4/3), moist, slickensides (pedogenic) on faces of peds and 70 percent prominent olive brown (2.5Y 4/3), moist, pressure faces on faces of peds; 1 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; clear wavy boundary. Lab sample # 94P0426; observed in trench. Polygon #8; continuous - phpvsfiid 207392; patchy - phpvsfiid 207393; continuous - phpvsfiid 207392; patchy - phpvsfiid 207393
    BC1—96 to 107 centimeters (37.8 to 42.1 inches); light olive brown (2.5Y 5/4) exterior, olive brown (2.5Y 4/4) exterior, moist; gravelly clay; 45 percent clay; moderate medium angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; 0.5 very fine roots throughout; 0.5 very fine low-continuity tubular pores; 30 percent prominent olive brown (2.5Y 4/4), moist, pressure faces on faces of peds and 60 percent prominent olive brown (2.5Y 4/4), moist, slickensides (pedogenic) on faces of peds; 20 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; clear wavy boundary. Lab sample # 94P0427; observed in trench. Polygon #11; continuous - phpvsfiid 207394; patchy - phpvsfiid 207395; continuous - phpvsfiid 207394; patchy - phpvsfiid 207395
    BC2—107 to 190 centimeters (42.1 to 74.8 inches); light olive brown (2.5Y 5/4) exterior, olive brown (2.5Y 4/4) exterior, moist; extremely gravelly clay; 40 percent clay; weak medium angular blocky structure; slightly hard, friable, noncoherent, moderately sticky, moderately plastic; deformable; 0.5 very fine roots throughout; 3.0 very fine low-continuity interstitial pores; 5 percent by volume angular 75-162-250 millimeter unspecified fragments and 60 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; noneffervescent, by hcl, 1n; abrupt wavy boundary. Lab sample # 94P0428; observed in trench. Polygon #12A
    R—190 to 215 centimeters (74.8 to 84.6 inches); fragments. Lab sample # 94P0429; observed in trench. Polygon #13A