IDENTIFIERS

  • Current Taxon Name (Soil Name): Diablo
  • OSD
  • Series Extent
  • User Site ID: S1961CA097011
  • User Pedon ID: S1961CA097011
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3096
  • NCSS Pedon Lab Data NASIS Record ID - 38225
  • Print Date: 5/20/2024

    • 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: 38.2852783
  • Std. Longitude: -122.6063919
  • Datum: WGS84
  • Township: 5N
  • Range: 7W
  • Section: 14
  • PLSS Details: NW 1/4, NW1/4
  • Location Description: Starting from the center of the town of Petaluma find the point due northeast 3 1/4 miles where East Washington Street forms a T junction with Adobe Road. The site is 6000 feet northerly of this point on a line bearing 5 deg east of true north on a sloping hillside of aspect southeast. It is 1120 feet due southeast of the homestead (Beffa's milk barn). (Site spotted on photo No. CSH-1BB-165.)
  • State: California
  • County: CA097—Sonoma
  • MLRA: 14—Central California Coastal Valleys
  • Non-MLRA Soil Survey Area: CA097—Sonoma County, California

    • PEDON

  • Current Taxonomic Class: Fine, smectitic, thermic Aridic Haploxererts
  • Current Taxon Kind: series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 11
  • Correlated Information:
  • Soil Name - Diablo
  • PSC - 25 to 100 cm.
  • Classificaton Date - 7/23/2007
  • Moisture Class - xeric
  • Moisture Subclass - aridic (torric)
  • Sampled As Information:
  • Soil Name - Diablo
  • Classificaton Date - 6/27/1961
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: hills
  • Drainage Class: moderately well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/27/1961 (actual site observation date)
  • Air Photo ID: CSH1BB165
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - hayland
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • 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

    13

    —

    —

    104

    —

    135

    635

    —

    —

    14.4

    18.9

    8.3

    —

    —

    —

    —

    —

    —

    —

    —
    AP—0 to 18 centimeters (0.0 to 7.1 inches); gray (N 5/0), black (10YR 2/1), moist; clay; fine and medium granular structure; very hard, extremely firm, very sticky, very plastic; 21.0 very fine roots; 21.0 very fine interstitial pores; fragments; moderately acid, pH 6.0, unspecified; abrupt smooth boundary. Lab sample # 40A24208. immediate surface tends to be fine medium granular; a few vertical cracks throughout horizon.
    A11—18 to 43 centimeters (7.1 to 16.9 inches); dark gray (N 4/0), black (10YR 2/1), moist; clay; massive; extremely hard, extremely firm, very sticky, very plastic; 21.0 very fine to medium roots; 3.0 very fine to medium interstitial and tubular pores; slickensides (pedogenic); fragments; neutral, pH 7.0, unspecified; gradual wavy boundary. Lab sample # 40A24209. very few fine lime spots also present; a few vertical cracks throughout horizon.
    A12—43 to 74 centimeters (16.9 to 29.1 inches); dark gray (N 4/0), black (10YR 2/1), moist; clay; 1 percent white (5Y 8/1) fine mottles; massive; extremely hard, extremely firm, very sticky, very plastic; 21.0 very fine to medium roots; 3.0 very fine to medium interstitial and tubular pores; slickensides (pedogenic); fragments; slightly alkaline, pH 7.5, unspecified; diffuse wavy boundary. Lab sample # 40A24210. few scattered medium lime blotches throughout horizon.
    A13—74 to 99 centimeters (29.1 to 39.0 inches); gray (5Y 5/1), black (10YR 2/1), moist; clay; 1 percent white (5Y 8/1) fine mottles; massive; extremely hard, extremely firm, very sticky, very plastic; 21.0 very fine to medium roots; 3.0 very fine to medium interstitial and tubular pores; slickensides (pedogenic); fragments; slightly alkaline, pH 7.5, unspecified; clear irregular boundary. Lab sample # 40A24211. many small lime blotches scattered throughout horizon.
    C1—99 to 137 centimeters (39.0 to 53.9 inches); light olive gray (5Y 6/2), white (5Y 8/1) and olive gray (5Y 4/2), moist; clay; massive; extremely hard, extremely firm, very sticky, very plastic; 21.0 very fine roots; 3.0 very fine and fine tubular pores; slickensides (pedogenic); fragments; moderately alkaline, pH 8.0, unspecified; gradual smooth boundary. Lab sample # 40A24212. a few vertical streaks of A horizon less than five millimeters wide mixed in.
    C2—137 to 165 centimeters (53.9 to 65.0 inches); gray (5Y 6/1), white (5Y 8/1) and olive gray (5Y 4/2), moist; clay; massive; extremely hard, very firm, very sticky, very plastic; 0.5 very fine roots; 3.0 very fine and fine tubular pores; slickensides (pedogenic); fragments; moderately alkaline, pH 8.0, unspecified; clear irregular boundary. Lab sample # 40A24213. vertical lime krotovina 1-1/2 inches diameter throughout horizon.
    C3—165 to 193 centimeters (65.0 to 76.0 inches); light gray (5Y 7/1), dark gray (5Y 4/1) and light olive gray (5Y 6/2), moist; silty clay; massive parts to fine and medium subangular blocky; very hard, very firm, very sticky, moderately plastic; 0.0 roots; 0.1 fine tubular pores; fragments; violent effervescence; moderately alkaline, pH 8.0, unspecified. Lab sample # 40A24214. horizon soil material has the appearance of weathered siltstone; large lime blotches present are violently effervescent upon application of dilute hydrochloric acid.