IDENTIFIERS

  • Current Taxon Name (Soil Name): ALTAMONT
  • OSD
  • Series Extent
  • User Site ID: S1958CA001004
  • User Pedon ID: S1958CA001004
  • Vegetation Plot ID: S1958CA001004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3083
  • NCSS Pedon Lab Data NASIS Record ID - 38212
  • Print Date: 2/17/2025

    • 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: 37.7486115
  • Std. Longitude: -121.7088852
  • Datum: WGS84
  • Township: 2S
  • Range: 3E
  • Section: 24
  • PLSS Details: 700 feet east and 2600 feet south of northwest corner
  • Location Description: Flynn Ranch.
  • State: California
  • County: CA001—Alameda
  • MLRA: 15—Central California Coast Range
  • Non-MLRA Soil Survey Area: CA609—Alameda Area, California

    • PEDON

  • Describers Name: R. Ulrich
  • Current Taxonomic Class: Fine, smectitic, thermic Aridic Haploxererts
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 4
  • Correlated Information:
  • Soil Name - ALTAMONT
  • PSC - 25 to 100 cm.
  • Classificaton Date - 7/16/2007
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Altamont
  • Classificaton Date - 6/1/1958
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Slope Shape Down: concave
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/1/1958 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • 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

    HOMU

    Hordeum murinum

    mouse barley

    —

    —

    —
    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

    7

    —

    —

    137

    —

    180

    292

    —

    —

    —

    —

    —

    15.6

    —

    —

    —

    —

    —

    —

    —
    A11—0 to 18 centimeters (0.0 to 7.1 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; clay; strong coarse prismatic, and strong medium and coarse angular blocky structure; very hard, very firm, moderately sticky, very plastic; 21.0 fine roots; 1.0 very fine and fine tubular pores; fragments; noneffervescent; clear smooth boundary. Lab sample # 40A24117. numerous fine roots tending to concentrate along structure planes and facings; reaction not determined in field, see lab data; structure facings have very dark brown to black carbonaceous films and mats on them in places
    A12—18 to 46 centimeters (7.1 to 18.1 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; clay; strong coarse prismatic, and strong coarse angular blocky structure; very hard, very firm, moderately sticky, very plastic; 1.0 fine roots; 1.0 very fine and fine tubular pores; 1 percent noncoherent cemented white (10YR 8/1) lime masses; fragments; noneffervescent; clear smooth boundary. Lab sample # 40A24118. noncalcareous in most of mass with few white films or small soft white lime segregations in lowest portion of horizon; many slickensides especially in lower portion
    A13—46 to 66 centimeters (18.1 to 26.0 inches); brown (10YR 4/3), dark brown (10YR 3/3), moist; clay; moderate coarse prismatic, and moderate medium subangular blocky structure; very hard, very firm, moderately sticky, very plastic; 1.0 fine roots; 1.0 very fine and fine tubular pores; 3 percent fine weakly coherent cemented pinkish white (7.5YR 8/2) lime masses; fragments; slight effervescence; clear wavy boundary. Lab sample # 40A24119
    A14CA—66 to 94 centimeters (26.0 to 37.0 inches); dark yellowish brown (10YR 4/4), dark yellowish brown (10YR 3/4), moist; clay; moderate coarse prismatic, and moderate coarse prismatic, and moderate medium subangular blocky structure; very hard, very firm, moderately sticky, very plastic; 1.0 fine roots; 1.0 very fine and fine tubular pores; 21 percent fine weakly coherent cemented pinkish white (7.5YR 8/2) lime masses; fragments; strong effervescence; clear smooth boundary. Lab sample # 40A24120. matrix is slightly calcareous, with the lime segregations strongly calcareous
    ACCA—94 to 119 centimeters (37.0 to 46.9 inches); yellowish brown (10YR 5/4), dark yellowish brown (10YR 4/4), moist; silty clay loam; weak fine and medium subangular blocky structure; hard when dry, firm, slightly sticky, moderately plastic; 0.5 fine roots; 1.0 very fine and fine tubular pores; carbonate nodules and 1 percent fine noncoherent cemented pinkish white (7.5YR 8/2) lime masses; fragments; slight effervescence; abrupt smooth boundary. Lab sample # 40A24121. matrix is very slightly to slightly calcareous with strong reaction in lime segregations
    R—119 to 150 centimeters (46.9 to 59.1 inches); pale olive (5Y 6/3), olive (5Y 5/3), moist; fragments; slight effervescence; abrupt boundary. Lab sample # 40A24122. In thin interbedded strata, the sandstone is very weakly calcareous, and the limestone is strongly calcareous; the parent rock is somewhat shattered and fractured but mainly abrupt and continuous beneath this profile