IDENTIFIERS

  • Current Taxon Name (Soil Name): Ypsilon
  • OSD
  • Series Extent
  • User Site ID: S1997CO069002
  • User Pedon ID: 97CO069002
  • Vegetation Plot ID: S1997CO069002
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 98P0313
  • NCSS Pedon Lab Data NASIS Record ID - 10584
  • 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: 40.3844452
  • Std. Longitude: -105.6636124
  • Datum: WGS84
  • State: Colorado
  • County: CO069—Larimer
  • MLRA: 48A—Southern Rocky Mountains
  • Non-MLRA Soil Survey Area: CO651—Rocky Mountain National Park, Colorado, Parts of Boulder, Grand, and Larimer Counties
  • 7.5 Minute USGS Quad: 40105-D6—Trail Ridge, Colorado

    • PEDON

  • Describers Name: Mike Peterson, Steve Blecker
  • Current Taxonomic Class: Loamy-skeletal, isotic Typic Haplocryods
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 2
  • Correlated Information:
  • Soil Name - Ypsilon
  • PSC - 41 to 116 cm.
  • Classificaton Date - 1/27/2010
  • Moisture Class - udic
  • Sampled As Information:
  • Soil Name - Leighcan
  • Taxonomic Class - Loamy-skeletal, paramicaceous Dystric Cryochrept
  • Taxon Kind - series
  • Classificaton Date - 9/18/1997
  • Moisture Class - udic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: mountains
  • Landform: mountain slope
  • Hill Slope Profile: backslope
  • Runoff: very high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments: 1.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 9/18/1997 (actual site observation date)
  • Air Photo ID: 1060-8
  • 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

    ABLA

    PIEN

    VASC

    Abies lasiocarpa

    Picea engelmannii

    Vaccinium scoparium

    subalpine fir

    Engelmann spruce

    grouse whortleberry

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    —

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

    albic horizon

    cambic horizon

    16—35

    47—104

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    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

    40

    —

    —

    3162

    —

    350

    762

    —

    —

    2

    —

    —

    2

    —

    —

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    Oi—0 to 16 centimeters (0.0 to 6.3 inches); fragments. Lab sample # 98P01894, 98P01895. Moderately decomposed plant material.
    E—16 to 35 centimeters (6.3 to 13.8 inches); dark grayish brown (10YR 4/2), light gray (10YR 7/2), dry; gravelly sandy loam; 12 percent clay; moderate fine and medium granular structure; soft, very friable, slightly sticky, slightly plastic; 21.0 very fine roots and 3.0 fine and medium roots and 0.5 coarse roots; 2 percent by volume 75-162-250 millimeter unspecified fragments and 20 percent by volume 2-39-75 millimeter unspecified fragments; noneffervescent; very strongly acid, pH 4.8, hellige-truog; clear wavy boundary. Lab sample # 98P01889
    EB—35 to 47 centimeters (13.8 to 18.5 inches); 60 percent brown (10YR 4/3) and 40 percent brown (7.5YR 4/4), 60 percent pale brown (10YR 6/3) and 40 percent brown (7.5YR 5/3), dry; very cobbly loamy coarse sand; 6 percent clay; single grain; loose, loose, nonsticky, nonplastic; 21.0 very fine and fine roots and 0.5 medium and coarse roots; 15 percent by volume 75-162-250 millimeter unspecified fragments and 25 percent by volume 2-39-75 millimeter unspecified fragments; noneffervescent; very strongly acid, pH 4.8, hellige-truog; clear wavy boundary. Lab sample # 98P01890
    Bs1—47 to 76 centimeters (18.5 to 29.9 inches); strong brown (7.5YR 4/6), brown (7.5YR 5/4), dry; very cobbly coarse sandy loam; 9 percent clay; weak medium subangular blocky structure; very hard, firm, slightly sticky, nonplastic; 0.5 medium and coarse roots and 3.0 fine roots; 30 percent iron stains; 5 percent by volume 250-425-600 millimeter unspecified fragments and 15 percent by volume 75-162-250 millimeter unspecified fragments and 20 percent by volume 2-39-75 millimeter unspecified fragments; noneffervescent; very strongly acid, pH 4.8, hellige-truog; gradual smooth boundary. Lab sample # 98P01891. Very dense material that is difficult to dig; material is slow to absorb water when added for texturing; 30 percent of material has higher chroma of 7.5YR 4/8 that streaks horizontally when pressed between thumb and forefinger; material crunches like corn flakes; rupture resistance is very hard when in small blocks; moderately cemented; block can be crushed when using two hands (80-10ON).
    Bs2—76 to 104 centimeters (29.9 to 40.9 inches); brown (7.5YR 4/4), brown (7.5YR 5/4), dry; extremely stony sandy loam; 11 percent clay; weak coarse subangular blocky, and moderate fine subangular blocky structure; hard when dry, firm, slightly sticky, slightly plastic; 0.5 fine to coarse roots; 10 percent iron stains; 20 percent by volume 2-39-75 millimeter unspecified fragments and 25 percent by volume 75-162-250 millimeter unspecified fragments and 30 percent by volume 250-425-600 millimeter unspecified fragments; noneffervescent; very strongly acid, pH 4.8, hellige-truog; gradual smooth boundary. Lab sample # 98P01892. Material is slow to absorb water, beads up on soil peds; <10% of matrix has 7.5YR 4/8 streaks; rupture resistance of small blocks is hard; can break with one hand but takes considerable force probably less than 8ON.
    C—104 to 168 centimeters (40.9 to 66.1 inches); dark yellowish brown (10YR 4/4), light yellowish brown (10YR 6/4), dry; extremely cobbly loamy coarse sand; 5 percent clay; massive; hard when dry, very friable, nonsticky, nonplastic; 0.5 medium roots; 10 percent by volume 250-425-600 millimeter unspecified fragments and 20 percent by volume 2-39-75 millimeter unspecified fragments and 30 percent by volume 75-162-250 millimeter unspecified fragments; noneffervescent; very strongly acid, pH 4.8, hellige-truog. Lab sample # 98P01893