IDENTIFIERS

  • Current Taxon Name (Soil Name): Altamont
  • OSD
  • Series Extent
  • User Site ID: 93CA011003
  • User Pedon ID: 93CA011003
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 94P0051
  • Print Date: 11/26/2024

    • 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: 15—Central California Coast Range
  • Non-MLRA Soil Survey Area: CA011—Colusa County, California
  • 7.5 Minute USGS Quad: 39122-C3—Sites, California

    • PEDON

  • Describers Name: Susan Southard, Maxine Levin, and Gaylon Lane
  • Current Taxonomic Class: Fine, smectitic, thermic Chromic 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 - 3/16/2006
  • 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: 0.00 percent
  • 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
  • Site Obs. Cover Kind 2 - rangeland, grassland
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • 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

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    Colusa SW

    —
    A—0 to 10 centimeters (0.0 to 3.9 inches); olive brown (2.5Y 4/3) exterior, dark olive brown (2.5Y 3/3) exterior, moist; clay loam; 38 percent clay; weak coarse subangular blocky, and weak very fine and fine subangular blocky structure; hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; high toughness; 25.0 very fine roots throughout and 10.0 fine roots throughout; 0.5 fine low-continuity discontinuous tubular pores; fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 94P0436; observed in trench. Polygon #1D. This polygon is also on west face of transect. 2 cm maximum crack width.
    Bw—10 to 34 centimeters (3.9 to 13.4 inches); olive brown (2.5Y 4/3) exterior, dark olive brown (2.5Y 3/3) exterior, moist; clay; 40 percent clay; moderate coarse angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; high toughness; 19.0 very fine roots throughout and 2.0 fine roots throughout; 0.5 fine low-continuity continuous tubular pores; 20 percent prominent pressure faces on faces of peds; fragments; noneffervescent, by hcl, 1n; gradual wavy boundary. Lab sample # 94P0437; observed in trench. Polygon #17. 40 cm wide prism parting to moderate coarse angular blocky 10 cm wide, parting to 5 cm moderate coarse angular blocky.; patchy - phpvsfiid 207381; patchy - phpvsfiid 207381
    Bss1—34 to 61 centimeters (13.4 to 24.0 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 45 percent clay; moderate coarse angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; high toughness; 10.0 very fine roots throughout and 0.5 fine roots throughout; 0.5 very fine low-continuity continuous tubular pores; 40 percent prominent pressure faces on faces of peds and 60 percent prominent slickensides (pedogenic) on faces of peds; fragments; noneffervescent, by hcl, 1n; diffuse wavy boundary. Lab sample # 94P0438; observed in trench. Polygon #21. 48 cm wide prism parting to moderate coarse angular blocky and wedge-shaped peds. 3 cm crack width.; continuous - phpvsfiid 207382; patchy - phpvsfiid 207383; continuous - phpvsfiid 207382; patchy - phpvsfiid 207383
    Bss2—61 to 100 centimeters (24.0 to 39.4 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 45 percent clay; moderate coarse angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; high toughness; 5.0 very fine roots throughout; 0.5 very fine low-continuity continuous tubular pores; 40 percent prominent pressure faces on faces of peds and 60 percent prominent slickensides (pedogenic) on faces of peds; fragments; noneffervescent, by hcl, 1n; diffuse wavy boundary. Lab sample # 94P0439; observed in trench. Polygon #22. 70 cm wide between cracks, prism parting to moderate coarse angular blocky and wedge-shaped peds. 4 cm crack width.; continuous - phpvsfiid 207384; patchy - phpvsfiid 207385; continuous - phpvsfiid 207384; patchy - phpvsfiid 207385
    Bss3—100 to 120 centimeters (39.4 to 47.2 inches); light olive brown (2.5Y 5/3) exterior, olive brown (2.5Y 4/3) exterior, moist; clay; 45 percent clay; weak coarse angular blocky structure; very hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; high toughness; 4.0 very fine roots throughout; 0.5 very fine low-continuity continuous tubular pores; 40 percent prominent pressure faces on faces of peds and 60 percent prominent slickensides (pedogenic) on faces of peds; fragments; noneffervescent, by hcl, 1n; clear wavy boundary. Lab sample # 94P0440; observed in trench. Polygon #24. Slickensides controlling the size of structure weak coarse angular blocky.; continuous - phpvsfiid 207386; patchy - phpvsfiid 207387; continuous - phpvsfiid 207386; patchy - phpvsfiid 207387
    Bk—120 to 144 centimeters (47.2 to 56.7 inches); light olive brown (2.5Y 5/4) exterior, olive brown (2.5Y 4/3) exterior, moist; gravelly clay; 40 percent clay; moderate medium angular blocky structure; hard, firm, noncoherent, moderately sticky, moderately plastic; deformable; high toughness; 0.5 very fine roots throughout; 0.5 very fine low-continuity continuous tubular pores; 10 percent prominent pressure faces on faces of peds; 2 percent fine threadlike noncoherent cemented light gray (2.5Y 7/2) carbonate threads between peds and 2 percent fine spherical noncoherent cemented light gray (2.5Y 7/2) carbonate concretions between peds; 15 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; slight effervescence, by hcl, 1n; gradual wavy boundary. Lab sample # 94P0441; observed in trench. Polygon #23. 2 cm cracks at top of horizon tapered to 2 mm thick crack into BC. Beds of calcareous material that have been dragged and mixed in this layer.; patchy - phpvsfiid 207388; patchy - phpvsfiid 207388
    BC—144 to 200 centimeters (56.7 to 78.7 inches); 10 percent light yellowish brown (2.5Y 6/3) exterior and 5 percent brownish yellow (10YR 6/6) exterior very gravelly clay; 40 percent clay; weak medium subangular blocky structure; hard, friable, noncoherent, moderately sticky, moderately plastic; deformable; high toughness; 0.5 very fine roots throughout; 0.5 very fine low-continuity continuous tubular pores; 1 percent fine spherical noncoherent cemented light gray (2.5Y 7/2) carbonate concretions between peds; 40 percent by volume angular 2-39-75 millimeter shale, unspecified fragments; very slight effervescence, by hcl, 1n. Lab sample # 94P0442; observed in trench. Polygon #27