IDENTIFIERS

  • Current Taxon Name (Soil Name): Ahwahnee
  • OSD
  • Series Extent
  • User Site ID: S2017CA039004
  • User Pedon ID: S2017CA039004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 17N0818
  • User Project ID: 2017 SJER_017_NEON
  • Project Name: NEON - San Joaquin
  • 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: 37.0864679
  • Std. Longitude: -119.7194138
  • Datum: WGS84
  • Location Description: 20.1;98;40x40 SW marker
  • Map Unit: AeD—Ahwahnee and Vista rocky coarse sandy loams, 8 to 30 percent slopes
  • Country: US—United States
  • State: California
  • County: CA039—Madera
  • MLRA: 18—Sierra Nevada Foothills
  • Non-MLRA Soil Survey Area: CA651—Madera Area, California
  • 7.5 Minute USGS Quad: 37119-A6—Millerton Lake West, California

    • PEDON

  • Describers Name: Andrew Brown; Jennifer Wood
  • Current Taxonomic Class: Coarse-loamy, mixed, active, thermic Mollic Haploxeralfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: research site
  • Pedon Record Orgin: NASIS
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium derived from granodiorite and/or residuum weathered from granodiorite
  • Landscape: foothills
  • Landform: hill
  • Geomorphic Component Hills: nose slope
  • Hill Slope Profile: shoulder
  • Slope Position: upper third
  • Slope Complexity: complex
  • Slope Shape Across: convex
  • Slope Shape Down: convex
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: strongly coherent granodiorite at 70cm with 10 to <45
  • Surface Fragments: 2.00 percent nonflat subrounded very strongly coherent cemented 2- to 75-millimeter granodiorite, 2.00 percent nonflat subrounded very strongly coherent cemented 600- to 3000-millimeter granodiorite,
  • Benchmark Soil?: no
  • Plot #: 23
  • RaCA Information:
  • RaCA Site ID - SJER_023
  • Plot or Site Recorder - Andrew Brown

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/14/2017 (actual site observation date)
  • Data Collector: Andrew Brown; Jennifer Wood
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, savanna
  • 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, lithic

    strongly coherent

    70 - 200

    - 130 -

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

    ochric epipedon

    argillic horizon

    lithic contact

    0—22

    22—70

    70—200

    —22—

    —48—

    —130—
    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

    11

    —

    —

    332

    —

    117

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A—0 to 5 centimeters (0.0 to 2.0 inches); dark grayish brown (10YR 4/2) crushed, black (7.5YR 2.5/1) crushed, moist; highly organic loamy sand; 75 percent sand; 20 percent silt; 5 percent clay; moderate fine granular, and moderate medium granular structure; soft, very friable, nonsticky, nonplastic; many (6.0) very fine roots throughout and common (1.0) fine roots throughout; many (5.0) very fine irregular pores; 3 percent by volume nonflat subangular very strongly coherent cemented 2-10-20 millimeter granitoid fragments observed by visual inspection method; noneffervescent, by hcl, 1n; strongly acid, pH 5.5, pH meter; clear wavy boundary. Lab sample # 17N04070; dry when described; observed in pit, small
    BA—5 to 22 centimeters (2.0 to 8.7 inches); pale brown (10YR 6/3) broken face, brown (7.5YR 4/3) broken face, moist; loamy sand; 75 percent sand; 19 percent silt; 6 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; common (1.0) very fine roots throughout and moderately few (0.5) fine roots throughout; many (5.0) very fine irregular pores; 3 percent by volume nonflat subangular very strongly coherent cemented 2-10-20 millimeter granitoid fragments observed by visual inspection method; noneffervescent, by hcl, 1n; moderately acid, pH 5.7, pH meter; clear wavy boundary. Lab sample # 17N04071; dry when described; observed in pit, small
    Bt1—22 to 32 centimeters (8.7 to 12.6 inches); very pale brown (10YR 7/4) broken face, brown (7.5YR 5/4) broken face, moist; sandy loam; 70 percent sand; 19 percent silt; 11 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, firm, slightly sticky, nonplastic; very few (0.1) very fine roots throughout and many (8.0) very fine roots around fragments and moderately few (0.5) fine roots throughout; common (3.0) very fine irregular and common (1.0) fine irregular pores; 1 percent faint clay films on surfaces along pores and 5 percent distinct clay bridges between sand grains; 3 percent by volume nonflat subangular very strongly coherent cemented 2-10-20 millimeter granitoid fragments observed by visual inspection method; noneffervescent, by hcl, 1n; strongly acid, pH 5.3, pH meter; clear wavy boundary. Lab sample # 17N04072; dry when described; observed in pit, small
    Bt2—32 to 54 centimeters (12.6 to 21.3 inches); very pale brown (10YR 7/4) broken face, brown (7.5YR 5/4) broken face, moist; sandy clay loam; 60 percent sand; 18 percent silt; 22 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky, and moderate coarse subangular blocky structure; very hard, very firm, moderately sticky, moderately plastic; very few (0.1) very fine roots throughout; few (0.5) very fine irregular and common (1.0) fine tubular pores; 2 percent faint clay films on surfaces along pores and 5 percent faint clay films on all faces of peds and 15 percent distinct clay bridges between sand grains; 5 percent by volume nonflat subangular very strongly coherent cemented 2-10-20 millimeter granitoid fragments observed by visual inspection method; noneffervescent, by hcl, 1n; strongly acid, pH 5.3, pH meter; gradual wavy boundary. Lab sample # 17N04073; slightly dry when described; observed in pit, small
    BCt—54 to 70 centimeters (21.3 to 27.6 inches); very pale brown (10YR 7/4) broken face, brown (7.5YR 5/4) broken face, moist; sandy loam; 70 percent sand; 17 percent silt; 13 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, firm, slightly sticky, nonplastic; very few (0.1) very fine roots throughout and many (8.0) very fine roots around fragments; common (3.0) very fine irregular and common (1.0) fine tubular pores; 1 percent faint clay films on surfaces along pores and 5 percent distinct clay bridges between sand grains; 5 percent by volume nonflat subangular very strongly coherent cemented 2-10-20 millimeter granitoid fragments observed by visual inspection method and 5 percent by volume nonflat subangular very strongly coherent cemented 20-48-75 millimeter granitoid fragments observed by visual inspection method; noneffervescent, by hcl, 1n; strongly acid, pH 5.2, pH meter; abrupt irregular boundary. Lab sample # 17N04074; slightly dry when described; observed in pit, small
    R—70 to 200 centimeters (27.6 to 78.7 inches); bedrock; strongly coherent; fragments; noneffervescent, by hcl, 1n.; observed in pit, small