IDENTIFIERS

  • Current Taxon Name (Soil Name): Masthead
  • OSD
  • Series Extent
  • User Site ID: S2006CA037001
  • User Pedon ID: S2006CA037001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 06N0792
  • NCSS Pedon Lab Data NASIS Record ID - 18635
  • Print Date: 2/16/2025

    • 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: 33.4040565
  • Std. Longitude: -118.4023056
  • Datum: WGS84
  • Country: US—United States
  • State: California
  • County: CA037—Los Angeles
  • MLRA: 20—Southern California Mountains
  • Non-MLRA Soil Survey Area: CA688—Channel Islands Area, California, Parts of Santa Barbara and Los Angeles Counties

    • PEDON

  • Describers Name: Matthew E. Ballmer
  • Current Taxonomic Class: Fine, smectitic, thermic Pachic Argixerolls
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Masthead
  • Taxonomic Class - Fine, smectitic, thermic Pachic Argixerolls
  • PSC - 8 to 58 cm.
  • Classificaton Date - 4/19/2006
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - xeric
  • Moisture SUBClass - xeric
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: slope alluvium over quartz-muscovite (gneissoid) residuum weathered from metasedimentary rock
  • Landscape: island
  • Landform: interfluve
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Shape Across: linear
  • Slope Shape Down: convex
  • Bedrock: weakly coherent moderate weathered metasedimentary rock, unspecified at 80cm
  • Surface Fragments: 30.00 percent nonflat rounded 2- to 75-millimeter 10.00 percent nonflat rounded 75- to 250-millimeter
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/19/2006 (actual site observation date)
  • Air Photo ID: G
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, paralithic

    moderately coherent

    80 - 100

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

    mollic epipedon

    argillic horizon

    —

    8—58

    —-

    —-
    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

    38

    —

    —

    480

    —

    320

    14

    —

    —

    16

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 8 centimeters (0.0 to 3.1 inches); light brown (7.5YR 6/4) broken face, brown (7.5YR 4/3) broken face, moist; silt loam; 20 percent clay; strong medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; low excavation difficulty; 2.0 very fine roots; faint light brown (7.5YR 6/4), dry, silt coats on all faces of peds and faint light brown (7.5YR 6/4), dry, silt coats on surfaces along pores; 5 percent by volume nonflat rounded 2-39-75 millimeter unspecified fragments; neutral, pH 7.0, phenol red; clear wavy boundary. Lab sample # 06N03264; observed in pit, small. continuous - phpvsfiid 326964; continuous - phpvsfiid 326965; continuous - phpvsfiid 326964; continuous - phpvsfiid 326965
    Bt1—8 to 24 centimeters (3.1 to 9.4 inches);, 60 percent dark brown (7.5YR 3/3) broken face, moist; clay loam; 38 percent clay; strong medium angular blocky structure; hard, firm, moderately sticky, very plastic; high excavation difficulty; 1.0 very fine roots; prominent dark brown (7.5YR 3/3), moist, clay films on all faces of peds; fragments; slightly alkaline, pH 7.4, phenol red; gradual wavy boundary. Lab sample # 06N03265; observed in pit, small
    Bt2—24 to 65 centimeters (9.4 to 25.6 inches);, brown (10YR 4/3) broken face, moist; clay; 65 percent clay; strong coarse subangular blocky, and strong very coarse subangular blocky structure; hard, firm, very sticky, very plastic; high excavation difficulty; 1.0 very fine roots and 1.0 medium roots; prominent dark brown (7.5YR 3/3), moist, clay films on all faces of peds; fragments; slightly alkaline, pH 7.4, phenol red; gradual wavy boundary. Lab sample # 06N03266; observed in pit, small
    Bt3—65 to 80 centimeters (25.6 to 31.5 inches); variegated, 60 percent olive brown (2.5Y 4/3) broken face and 40 percent 5G 4/ (5G 4/), broken face, moist; clay; 50 percent clay; moderate medium subangular blocky structure; hard, firm, very sticky, very plastic; high excavation difficulty; 1.0 very fine roots and 1.0 medium roots; prominent dark brown (7.5YR 3/3), moist, clay films on all faces of peds; fragments; slightly alkaline, pH 7.6, phenol red; clear wavy boundary. Lab sample # 06N03267; observed in pit, small
    Cr—80 to 100 centimeters (31.5 to 39.4 inches); bedrock; very high excavation difficulty; fragments.; observed in pit, small