IDENTIFIERS

  • Current Taxon Name (Soil Name): McDonald
  • OSD
  • Series Extent
  • User Site ID: S1965MT047004
  • User Pedon ID: S1965MT047004
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3635
  • NCSS Pedon Lab Data NASIS Record ID - 39300
  • 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: 47.5443306
  • Std. Longitude: -114.0629044
  • Datum: WGS84
  • Township: 21N
  • Range: 19W
  • Section: 29
  • PLSS Details: 0.3 mile east of SW corner
  • State: Montana
  • County: MT047—Lake
  • MLRA: 44A—Northern Rocky Mountain Valleys
  • Non-MLRA Soil Survey Area: MT629—Lake County Area, Montana
  • 7.5 Minute USGS Quad: 47114-E1—Ronan, Montana

    • PEDON

  • Describers Name: C. A. Mogen
  • Current Taxonomic Class: Fine, illitic, frigid Boralfic Argixerolls
  • Current Taxon Kind: series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 4
  • Correlated Information:
  • Soil Name - McDonald
  • PSC - 58 to 100 cm.
  • Classificaton Date - 7/23/2007
  • Moisture Class - xeric
  • Sampled As Information:
  • Soil Name - Mcdonald
  • Classificaton Date - 7/15/1965
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Slope Shape Down: convex
  • Drainage Class: well
  • Surface Fragments: 3.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/15/1965 (actual site observation date)
  • Surface Cover Properties:
  • 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

    1

    —

    —

    975

    —

    135

    508

    —

    —

    5.6

    16.7

    —

    —

    —

    —

    —

    —

    —

    —

    —
    AP—0 to 25 centimeters (0.0 to 9.8 inches); dark gray (10YR 4/1), very dark grayish brown (10YR 3/2), moist; silt loam; strong fine granular structure; soft, friable, slightly sticky, slightly plastic; fragments; gradual boundary. Lab sample # 40A27979; moist when described;
    A12—25 to 36 centimeters (9.8 to 14.2 inches); grayish brown (10YR 5/2) and 22 percent dark gray (10YR 4/1), very dark brown (10YR 2/2), moist; silty clay loam; strong fine angular blocky parts to strong coarse granular structure; slightly hard, friable, slightly sticky, slightly plastic; 21.0 very fine and fine tubular pores; fragments; clear wavy boundary. Lab sample # 40A27980; moist when described;
    A2—36 to 46 centimeters (14.2 to 18.1 inches); light gray (10YR 7/2), brown (7.5YR 4/3), moist; silty clay loam; strong angular blocky structure; hard when dry, friable, slightly sticky, slightly plastic; 21.0 fine pores; fragments; gradual boundary. Lab sample # 40A27981; moist when described;
    B&A—46 to 58 centimeters (18.1 to 22.8 inches); 55 percent light brown (7.5YR 6/3), light brown (7.5YR 6/4) and brown (7.5YR 5/3), moist; silty clay; weak medium subangular blocky structure; very hard, friable, moderately sticky, very plastic; 21.0 fine and medium vesicular pores; clay films; fragments; gradual boundary. Lab sample # 40A27982; moist when described;
    B21T—58 to 74 centimeters (22.8 to 29.1 inches); light brown (7.5YR 6/3), brown (7.5YR 5/2), moist; silty clay; weak medium subangular blocky structure; extremely hard, friable, moderately sticky, very plastic; fragments. Lab sample # 40A27983; moist when described;
    B22T—74 to 102 centimeters (29.1 to 40.2 inches); pinkish gray (7.5YR 7/2), brown (7.5YR 4/3), moist; silty clay; weak medium and coarse subangular blocky structure; extremely hard, friable, moderately sticky, very plastic; 10.0 medium tubular pores; clay films on vertical faces of peds and 10 percent clay films; fragments; gradual boundary. Lab sample # 40A27984; moist when described;. continuous - phpvsfiid 189649; continuous - phpvsfiid 189649
    2B3—102 to 119 centimeters (40.2 to 46.9 inches); very pale brown (10YR 7/3) and light yellowish brown (10YR 6/4), brown (7.5YR 4/3), moist; silty clay loam; weak coarse platy structure; very hard, friable, nonsticky, nonplastic; 1.0 tubular pores; fragments; gradual wavy boundary. Lab sample # 40A27985; moist when described;
    2C1—119 to 157 centimeters (46.9 to 61.8 inches); light gray (10YR 7/2), brown (10YR 5/3), moist; silty clay loam; weak coarse platy, and very coarse prismatic structure; very hard, friable, moderately sticky, moderately plastic; 10 percent clay films in root channels and/or pores; fragments; strong effervescence. Lab sample # 40A27986; moist when described;
    2C2—157 to 198 centimeters (61.8 to 78.0 inches); light gray (2.5Y 7/2) and light brown (7.5YR 6/4) and brown (7.5YR 4/2), brown (10YR 5/3) crushed and brown (7.5YR 4/3) and brown (10YR 5/3), moist; silty clay loam; weak coarse platy structure; very hard, friable, very sticky, very plastic; fragments; strong effervescence. Lab sample # 40A27987; moist when described;
    3C3—198 to 236 centimeters (78.0 to 92.9 inches); light gray (2.5Y 7/2), brown (10YR 5/3) and light brownish gray (2.5Y 6/2) and grayish brown (10YR 5/2) crushed, moist; coarse sandy loam; clay films on vertical faces of peds; fragments; strong effervescence. Lab sample # 40A27988; moist when described;