IDENTIFIERS

  • Current Taxon Name (Soil Name): Burnson
  • OSD
  • Series Extent
  • User Site ID: S1986CO033001
  • User Pedon ID: 86CO033001
  • Vegetation Plot ID: S1986CO033001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 86P0854
  • NCSS Pedon Lab Data NASIS Record ID - 59148
  • Print Date: 2/16/2025

    • 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: 37.7341652
  • Std. Longitude: -108.6233368
  • Datum: WGS84
  • Township: 40N
  • Range: 16W
  • Section: 19
  • PLSS Details: SE 1/4, NW 1/4
  • Map Unit: 552—Burnson loam, 1 to 15 percent slopes
  • State: Colorado
  • County: CO033—Dolores
  • MLRA: 48A—Southern Rocky Mountains
  • Non-MLRA Soil Survey Area: CO672—Animas-Dolores Area, Colorado, Parts of Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan, and San Miguel Counties

    • PEDON

  • Describers Name: Hoffheins, D; Bowman, G; Klameth, L; Price, A.
  • Current Taxonomic Class: Fine-loamy, mixed, superactive, frigid Typic Haplustalfs
  • Current Taxon Kind: taxadjunct
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Burnson
  • PSC - 15 to 65 cm.
  • Classificaton Date - 12/29/2009
  • Moisture Class - ustic
  • Sampled As Information:
  • Soil Name - Burnac
  • Taxonomic Class - Fine, montmorillonitic Mollic Eutroboralf
  • Taxon Kind - series
  • Classificaton Date - 8/1/1986
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: eolian deposits and/or residuum weathered from noncalcareous sandstone
  • Landscape: plateaus or tablelands
  • Landform: mesa or butte
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: moderately well
  • Bedrock: with =>200
  • Surface Fragments: 1.45 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/1/1986 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - intermixed conifers and hardwoods
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Site Erosion Accelerated: water erosion
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    PIPO

    QUGA

    Pinus ponderosa

    Quercus gambelii

    ponderosa pine

    Gambel oak

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    —

    —

    —

    —

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

    argillic horizon

    15—66

    —-
    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

    2

    —

    —

    2450

    —

    270

    50

    —

    —

    —

    —

    —

    —

    —

    —

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    Oi—0 to 2 centimeters (0.0 to 0.8 inches); partially decomposed organic matter; fragments; abrupt smooth boundary. Slightly decomposed cones, twigs and leaves.
    A1—2 to 7 centimeters (0.8 to 2.8 inches); dark brown (7.5YR 3/2) exterior and very dark grayish brown (10YR 3/2) crushed, brown (10YR 4/3) exterior, dry; clay loam; 28 percent clay; weak very fine granular structure; soft, very friable, nonsticky, nonplastic; 0.5 very fine roots throughout and 0.5 fine roots throughout; 0.5 fine vesicular and tubular pores; fragments; neutral, pH 6.8, bromthymol blue; clear smooth boundary. Lab sample # 86P05103. few very fine roots throughout; few fine roots throughout
    AB—7 to 17 centimeters (2.8 to 6.7 inches); dark brown (7.5YR 3/2) exterior and dark brown (7.5YR 3/2) crushed, brown (10YR 4/3) exterior, dry; clay; 40 percent clay; moderate medium subangular blocky structure; hard, friable, very sticky, moderately plastic; 0.5 very fine roots throughout and 0.5 fine roots throughout; 2.5 very fine interstitial and tubular and 0.5 fine interstitial and tubular pores; 5 percent by volume 2-39-75 millimeter sandstone, unspecified fragments; slightly acid, pH 6.4, bromthymol blue; gradual wavy boundary. Lab sample # 86P05104. few very fine roots throughout; few fine roots throughout
    Bt1—17 to 25 centimeters (6.7 to 9.8 inches); dark reddish brown (5YR 3/4) exterior and dark reddish brown (5YR 3/3) crushed, reddish brown (5YR 4/4) exterior, dry; clay; 48 percent clay; moderate fine subangular blocky, and moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 0.5 medium roots throughout and 0.5 fine roots throughout; 0.5 very fine continuous tubular pores; 37 percent faint clay films on faces of peds; 5 percent by volume 2-39-75 millimeter sandstone, unspecified fragments; slightly acid, pH 6.2, bromthymol blue; clear wavy boundary. Lab sample # 86P05105. common clay films surface features on faces of peds; few fine roots throughout; few medium roots throughout; patchy - phpvsfiid 231703; patchy - phpvsfiid 231703
    Bt2—25 to 48 centimeters (9.8 to 18.9 inches); dark reddish brown (5YR 3/4) exterior and reddish brown (5YR 4/4) crushed, reddish brown (5YR 4/4) exterior, dry; clay; 48 percent clay; moderate medium prismatic, and moderate coarse prismatic structure; very hard, very firm, moderately sticky, moderately plastic; 0.5 medium roots throughout and 0.5 fine roots throughout; 37 percent distinct clay films on faces of peds; 5 percent by volume 75-162-250 millimeter sandstone, unspecified fragments and 5 percent by volume 2-39-75 millimeter sandstone, unspecified fragments; moderately acid, pH 6.0, bromthymol blue; gradual irregular boundary. Lab sample # 86P05106. common clay films surface features on faces of peds; few fine roots throughout; few medium roots throughout; patchy - phpvsfiid 231704; patchy - phpvsfiid 231704
    Bt3—48 to 68 centimeters (18.9 to 26.8 inches); dark reddish brown (5YR 3/4) exterior and reddish brown (5YR 4/4) crushed, yellowish red (5YR 4/6) exterior, dry; clay; 48 percent clay; weak coarse angular blocky, and moderate medium prismatic structure; very hard, very firm, moderately sticky, moderately plastic; 0.5 fine roots throughout; 55 percent prominent clay films on faces of peds; 5 percent by volume 75-162-250 millimeter sandstone, unspecified fragments and 5 percent by volume 2-39-75 millimeter sandstone, unspecified fragments; slightly acid, pH 6.2, bromthymol blue; gradual irregular boundary. Lab sample # 86P05107. many clay films surface features on faces of peds; few fine roots throughout; continuous - phpvsfiid 231705; continuous - phpvsfiid 231705
    BCt—68 to 104 centimeters (26.8 to 40.9 inches); 80 percent dark reddish brown (5YR 3/4) exterior and reddish brown (5YR 4/4) crushed and 20 percent reddish yellow (5YR 6/8) crushed, 90 percent brown (7.5YR 5/4) exterior and 10 percent light gray (10YR 7/2) exterior, dry; clay; 48 percent clay; weak coarse angular blocky structure; very hard, very firm, moderately sticky, moderately plastic; 55 percent prominent clay films on faces of peds; 5 percent by volume 2-39-75 millimeter sandstone, unspecified fragments; neutral, pH 6.8, bromthymol blue; clear smooth boundary. Lab sample # 86P05108. many clay films surface features on faces of peds; patchy - phpvsfiid 231706; patchy - phpvsfiid 231706
    BC—104 to 116 centimeters (40.9 to 45.7 inches); 80 percent reddish brown (5YR 4/4) exterior and 20 percent brown (7.5YR 4/4) crushed, 80 percent brown (7.5YR 5/4) exterior and 20 percent yellowish brown (10YR 5/8) exterior, dry; sandy clay; 11 percent brown (7.5YR 4/4) medium distinct mottles; weak medium subangular blocky structure; very hard, very firm, slightly sticky, slightly plastic; 15 percent prominent clay films on faces of peds; fragments; neutral, pH 7.0, bromthymol blue; abrupt smooth boundary. Lab sample # 86P05109. few clay films surface features on faces of peds; common medium distinct 7.5YR44 mottles; patchy - phpvsfiid 231707; patchy - phpvsfiid 231707
    R—116 to 152 centimeters (45.7 to 59.8 inches); fragments. Bedrock of Cretaceous Dakota and Burro Canyon Sandstone.