IDENTIFIERS

  • Current Taxon Name (Soil Name): Opequon
  • OSD
  • Series Extent
  • User Site ID: S1988MD001001
  • User Pedon ID: 88MD001001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 88P0503
  • NCSS Pedon Lab Data NASIS Record ID - 60621
  • Print Date: 4/28/2025

    • 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: 39.6405563
  • Std. Longitude: -78.6299973
  • Datum: WGS84
  • Location Description: Allegany County, 5 mi S of Flintstone, Evitts Creek Quadrangle; 2 mi E of Twigstown, 800 feet S of Murleys Branch Rd.
  • State: Maryland
  • County: MD001—Allegany

    • PEDON

  • Current Taxonomic Class: Fine, mixed, semiactive, mesic Typic Hapludalfs
  • Current Taxon Kind: taxadjunct
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Opequon
  • PSC - 28 to 64 cm.
  • Classificaton Date - 7/11/2007
  • Soil Taxonomic Edition - eleventh edition
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Opequon
  • PSC - 28 to 64 cm.
  • Classificaton Date - 4/1/1988
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Slope Shape Down: convex
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 4/1/1988 (actual site observation date)
  • Surface Cover Properties:
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • 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

    —

    —

    351

    —

    270

    —

    —

    —

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    Ap—0 to 20 centimeters (0.0 to 7.9 inches); strong brown (7.5YR 4/6) interior, light yellowish brown (10YR 6/4) interior, dry; silt loam; strong very fine angular blocky structure; very hard, friable; 5.5 fine roots and 0.5 coarse roots; 5.5 medium tubular pores; 8 percent by volume 2-76-150 millimeter limestone, unspecified fragments; abrupt wavy boundary. Lab sample # 88P02581. Few medium roots.; few coarse roots; many fine roots
    BA—20 to 28 centimeters (7.9 to 11.0 inches); strong brown (7.5YR 4/6) interior silt loam; moderate fine and medium angular blocky structure; friable; 5.5 fine and medium roots; 5.5 medium tubular pores; 5 percent by volume 2-76-150 millimeter limestone, unspecified fragments; neutral, pH 6.9, hellige-truog; abrupt wavy boundary. Lab sample # 88P02582. 10% inclusions of Bt horizon due to plowing.; many fine and medium roots
    Bt1—28 to 38 centimeters (11.0 to 15.0 inches); strong brown (7.5YR 5/6) interior silty clay; strong fine angular blocky structure; firm; 2.5 very fine and fine roots and 0.5 medium roots; 5.5 medium tubular pores; 55 percent distinct strong brown (7.5YR 4/6), moist, clay films on faces of peds and in pores; fragments; neutral, pH 7.2, hellige-truog; gradual wavy boundary. Lab sample # 88P02583. 8% coarse fragments. Few (2.5Y 5/4) soft shale bodies.; many clay films surface features on faces of peds and in pores; few medium roots; common very fine and fine roots
    Bt2—38 to 56 centimeters (15.0 to 22.0 inches); yellowish red (5YR 5/6) interior clay; moderate medium angular blocky structure; firm, moderately sticky, moderately plastic; 0.5 medium roots and 2.5 fine roots; 5.5 medium tubular pores; 55 percent distinct , moist, clay films on faces of peds and in pores; fragments; clear wavy boundary. Lab sample # 88P02584. 3% coarse fragments. Few(2.5Y 5/4) soft shale fragments.; many clay films surface features on faces of peds and in pores; few medium roots; common fine roots
    Bt3—56 to 64 centimeters (22.0 to 25.2 inches); strong brown (7.5YR 5/6) interior silty clay; 11 percent yellowish red (5YR 5/6) coarse faint mottles; moderate medium angular blocky structure; firm, moderately sticky, moderately plastic; 2.5 very fine and fine roots; 5.5 medium tubular pores; 55 percent distinct , moist, clay films on faces of peds and in pores; fragments; slightly alkaline, pH 7.4, hellige-truog; clear wavy boundary. Lab sample # 88P02585. 2% coarse fragments.; many clay films surface features on faces of peds and in pores; common very fine and fine roots; common coarse faint 5YR56 mottles
    BC1—64 to 76 centimeters (25.2 to 29.9 inches); yellowish red (5YR 4/6) interior and light olive brown (2.5Y 5/4) interior silty clay loam; moderate fine and medium platy structure; friable, moderately sticky, moderately plastic; 0.5 very fine roots; 55 percent distinct , moist, clay films; fragments; clear smooth boundary. Lab sample # 88P02586. 50% shale fragments.; many clay films surface features; few very fine roots
    BC2—76 to 89 centimeters (29.9 to 35.0 inches); strong brown (7.5YR 4/6) interior silty clay; 11 percent yellowish brown (10YR 5/6) medium faint mottles; moderate medium subangular blocky structure; firm, moderately sticky, moderately plastic; 0.5 very fine and fine roots; 37 percent distinct , moist, clay films on faces of peds; 11 percent fine iron-manganese concretions; 8 percent by volume 2-76-150 millimeter mixed fragments; clear smooth boundary. Lab sample # 88P02587. common fine iron-manganese concretions concentrations; common clay films surface features on faces of peds; few very fine and fine roots; common medium faint 10YR56 mottles
    BC3—89 to 97 centimeters (35.0 to 38.2 inches); yellowish brown (10YR 5/6) interior and strong brown (7.5YR 4/6) interior and light olive brown (2.5Y 5/4) interior silty clay loam; weak fine platy structure; friable, moderately sticky, moderately plastic; 0.5 medium roots and 0.5 fine roots; 37 percent distinct , moist, clay films; 5 percent by volume 2-76-150 millimeter mixed fragments; slightly alkaline, pH 7.7, hellige-truog; abrupt boundary. Lab sample # 88P02588. common clay films surface features; few fine roots; few medium roots
    R—97 to 122 centimeters (38.2 to 48.0 inches); weathered bedrock; fragments. Hard limestone.