IDENTIFIERS

  • Current Taxon Name (Soil Name): Motherlode
  • OSD
  • Series Extent
  • User Site ID: 07-JCR-001
  • User Pedon ID: S2007CA109001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 07N0470
  • NCSS Pedon Lab Data NASIS Record ID - 19073
  • Print Date: 12/17/2024

    • 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: 37.8480835
  • Std. Longitude: -120.5607224
  • Datum: WGS84
  • Township: 1 S.
  • Range: 13 E.
  • Section: 17
  • PLSS Details: about 520 meters (1,700 feet west and 840 meters (2,750 feet) south of the northeast corner of
  • Location Description: about 15 miles southwest of Sonora, CA and 0.7 miles west of Kistler Ranch and 300 feet north of the westbound lane of State Highway 108.
  • Map Unit: 7076—Bonanza-Loafercreek-Gopheridge complex, 15 to 30 percent slopes
  • Country: US—United States
  • State: California
  • County: CA109—Tuolumne
  • MLRA: 18—Sierra Nevada Foothills
  • Non-MLRA Soil Survey Area: CA630—Central Sierra Foothills Area, California, Parts of Calaveras and Tuolumne Counties
  • 7.5 Minute USGS Quad: 37120-G5—Keystone, California

    • PEDON

  • Describers Name: John Rule
  • Current Taxonomic Class: Coarse-loamy, mixed, superactive, thermic Typic Haploxerepts
  • Current Taxon Kind: taxadjunct
  • Pedon Type: taxadjunct to the series
  • Pedon Purpose: laboratory sampling site
  • Pedon Record Orgin: NASIS
  • Correlated Information:
  • Soil Name - Typic Haploxerepts
  • PSC - 25 to 100 cm.
  • Classificaton Date - 8/26/2015
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Motherlode
  • Taxon Kind - series
  • PSC - 20 to 70 cm.
  • Classificaton Date - 4/5/2007
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium derived from greenstone and/or residuum weathered from greenstone
  • Landscape: foothills
  • Landform: hillslope
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: middle third
  • Slope Complexity: complex
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: medium
  • Drainage Class: well
  • Bedrock: strongly coherent moderate weathered greenstone at 122cm
  • Geology: Gopher Ridge formation.
  • Surface Fragments: 3.00 percent nonflat subangular indurated 2- to 76-millimeter quartz, 5.00 percent nonflat subrounded indurated 2- to 20-millimeter greenstone, 3.00 percent nonflat subangular indurated 20- to 76-millimeter greenstone, 1.00 percent nonflat subangular indurated 76- to 250-millimeter greenstone,
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/5/2007 (actual site observation date)
  • Air Photo ID: 0821
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - sunny
    • Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, paralithic

    moderately coherent

    122 - 152

    - 30 -

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

    ochric epipedon

    cambic horizon

    paralithic contact

    0—18

    8—122

    122—

    —2—

    —31—

    —-
    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

    18

    —

    —

    315

    —

    93

    23

    —

    215

    19

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    A1—0 to 8 centimeters (0.0 to 3.1 inches); yellowish brown (10YR 5/4) crushed, dark yellowish brown (10YR 3/4) crushed, moist; silt loam; 15 percent sand; 69 percent silt; 16 percent clay; moderate medium granular structure; hard, firm, noncoherent, slightly sticky, nonplastic; moderate permeability; low excavation difficulty; 5.0 very fine roots throughout; 2.0 very coarse tubular and 2.0 medium tubular and 1.0 fine irregular and 2.0 coarse tubular pores; 2 percent by volume nonflat subrounded indurated 2-50-76 millimeter quartz fragments and 5 percent by volume nonflat subrounded indurated 2-50-76 millimeter greenstone fragments; 15 percent krotovinas (volume percent); noneffervescent, by hcl, 1n; slightly acid, pH 6.3, hellige-truog; abrupt wavy boundary. Lab sample # 07N03086; observed in pit, small
    A2—8 to 20 centimeters (3.1 to 7.9 inches); yellowish brown (10YR 5/4) crushed, dark brown (7.5YR 3/4) crushed, moist; silt loam; 15 percent sand; 67 percent silt; 18 percent clay; moderate medium subangular blocky structure; very hard, firm, noncoherent, slightly sticky, slightly plastic; moderate permeability; low excavation difficulty; 0.5 very fine roots throughout and 0.5 fine roots throughout; 0.5 very fine dendritic tubular and 1.0 very coarse tubular and 1.0 medium tubular and 1.0 coarse tubular pores; 2 percent by volume nonflat subrounded indurated 2-50-76 millimeter quartz fragments and 8 percent by volume nonflat subrounded indurated 2-50-76 millimeter greenstone fragments; 15 percent krotovinas (volume percent); noneffervescent, by hcl, 1n; moderately acid, pH 6.0, hellige-truog; clear smooth boundary. Lab sample # 07N03087; observed in pit, small
    2Bt1—20 to 43 centimeters (7.9 to 16.9 inches); brown (7.5YR 5/4) crushed, strong brown (7.5YR 4/6) crushed, moist; clay loam; 20 percent sand; 50 percent silt; 30 percent clay; moderate coarse subangular blocky parts to strong medium subangular blocky structure; extremely hard, very firm, noncoherent, moderately sticky, moderately plastic; moderately slow permeability; moderate excavation difficulty; 0.5 very fine roots throughout and 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 2.0 very fine dendritic tubular and 0.5 very coarse tubular and 0.5 medium tubular and 0.5 coarse tubular pores; 20 percent distinct red (2.5YR 4/8), dry, clay films on all faces of peds; 2 percent by volume nonflat subrounded indurated 2-50-76 millimeter quartz fragments and 4 percent by volume nonflat subrounded indurated 2-50-76 millimeter greenstone fragments; 12 percent krotovinas (volume percent); noneffervescent, by hcl, 1n; moderately acid, pH 6.0, hellige-truog; clear smooth boundary. Lab sample # 07N03088; observed in pit, small. discontinuous - phpvsfiid 357239; discontinuous - phpvsfiid 357239
    2Bt2—43 to 51 centimeters (16.9 to 20.1 inches); strong brown (7.5YR 4/6) crushed, strong brown (7.5YR 5/6) crushed, moist; clay; 20 percent sand; 35 percent silt; 45 percent clay; moderate medium prismatic parts to moderate coarse angular blocky structure; extremely hard, very firm, noncoherent, moderately sticky, very plastic; slow permeability; high excavation difficulty; 0.5 very fine roots throughout and 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 2.0 very fine dendritic tubular and 0.5 very coarse tubular and 0.5 coarse tubular pores; 70 percent distinct red (2.5YR 4/8), dry, clay films on all faces of peds; 12 percent by volume nonflat subrounded indurated 2-50-76 millimeter quartz fragments; 5 percent krotovinas (volume percent); noneffervescent, by hcl, 1n; moderately acid, pH 6.0, hellige-truog; abrupt broken boundary. Lab sample # 07N03089; observed in pit, small. continuous - phpvsfiid 357240; continuous - phpvsfiid 357240
    2CBt—51 to 122 centimeters (20.1 to 48.0 inches); 60 percent brown (7.5YR 5/4) crushed and 40 percent strong brown (7.5YR 5/6) crushed, strong brown (7.5YR 4/6) crushed, moist; 15 percent sand; 55 percent silt; 30 percent clay; 1 percent light greenish gray (5GY 7/1) medium distinct platy mottles; massive; hard, firm, noncoherent, slightly sticky, nonplastic; moderate permeability; high excavation difficulty; 0.5 very fine roots throughout and 0.5 medium roots throughout and 0.5 fine roots throughout and 0.5 coarse roots throughout; 0.5 very fine dendritic tubular and 0.5 very coarse tubular and 0.5 coarse tubular pores; 5 percent by volume nonflat subrounded strongly coherent cemented 2-50-76 millimeter greenstone fragments; 5 percent krotovinas (volume percent); noneffervescent, by hcl, 1n; moderately acid, pH 5.8, hellige-truog; abrupt broken boundary. Lab sample # 07N03090; observed in pit, small
    2Cr—122 to 152 centimeters (48.0 to 59.8 inches); strongly coherent; fragments.