IDENTIFIERS

  • Current Taxon Name (Soil Name): LOBITOS
  • OSD
  • Series Extent
  • User Site ID: S1955CA081013
  • User Pedon ID: S1955CA081013
  • Vegetation Plot ID: S1955CA081013
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3021
  • NCSS Pedon Lab Data NASIS Record ID - 38150
  • 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: 37.4027786
  • Std. Longitude: -122.3686142
  • Datum: WGS84
  • Location Description: 2,300 feet northeast of junction of Irish Creek Road and Tunitas Road on west side of Irish Creek Road. See Sheet 15, Soil Survey Report, San Mateo Area, California.
  • State: California
  • County: CA081—San Mateo
  • MLRA: 4—California Coastal Redwood Belt
  • Non-MLRA Soil Survey Area: CA637—San Mateo Area, California

    • PEDON

  • Describers Name: Ralph E. Nelson
  • Current Taxonomic Class: Fine-silty, mixed, mesic Typic Argixerolls
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 13
  • Correlated Information:
  • Soil Name - LOBITOS
  • PSC - 25 to 86 cm.
  • Classificaton Date - 7/16/2007
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Lobitos
  • Classificaton Date - 5/19/1955
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: hills
  • Landform: mountain
  • Runoff: very high
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/19/1955 (actual site observation date)
  • Surface Cover Properties:
  • 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

    BACCH

    CEANO

    TOXIC

    Baccharis

    Ceanothus

    Toxicodendron

    baccharis

    ceanothus

    poison oak

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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

    60

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    91

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    135

    813

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    O1&O2—0 to 3 centimeters (0.0 to 1.2 inches); fragments; abrupt smooth boundary. Lab sample # 40A23708. (no sample taken), loose, dark colored fresh and rotting twigs, leaves, and grass blades.
    A11—3 to 26 centimeters (1.2 to 10.2 inches); dark grayish brown (10YR 4/2), very dark brown (10YR 2/2), moist; loam; weak fine and medium subangular blocky structure; hard when dry, friable, nonsticky, slightly plastic; 21.0 roots; worm casts; fragments; slightly acid, pH 6.5, unspecified; clear wavy boundary. Lab sample # 40A23709. There are some worm casts and numerous roots.
    A12—26 to 49 centimeters (10.2 to 19.3 inches); dark grayish brown (10YR 4/2), very dark brown (10YR 2/2) and very dark grayish brown (10YR 3/2), moist; loam; weak fine and medium subangular blocky structure; hard when dry, friable, nonsticky, slightly plastic; 21.0 roots; fragments; slightly acid, pH 6.1, unspecified; clear wavy boundary. Lab sample # 40A23710. There are many roots and some rock fragments.
    B2—49 to 77 centimeters (19.3 to 30.3 inches); light olive brown (2.5Y 5/4), olive brown (2.5Y 4/4), moist; silty clay loam; moderate fine subangular blocky structure; hard when dry, firm, slightly sticky, moderately plastic; 21.0 roots; olive (5Y 5/3) clay films; fragments; slightly acid, pH 6.5, unspecified; clear wavy boundary. Lab sample # 40A23711. Rotten rock fragments give the soil a rather angular gravelly appearance.; patchy - phpvsfiid 186759; patchy - phpvsfiid 186759
    C—77 to 89 centimeters (30.3 to 35.0 inches); light olive brown (2.5Y 5/4), olive brown (2.5Y 4/4), moist; loam; massive; hard when dry, friable, nonsticky, slightly plastic; 0.5 roots; fragments; slightly acid, pH 6.3, unspecified; clear wavy boundary. Lab sample # 40A23712. Numerous pieces of rotten rock throughout the horizon.
    CR—89 to 89 centimeters (35.0 to 35.0 inches); light olive brown (2.5Y 5/4); fragments. Lab sample # 40A23713. coarsely angular, slightly weathered fragments of silty Purisima sandstone or shale and some loosened soil material. Many feet thick.