IDENTIFIERS

  • Current Taxon Name (Soil Name): Penitente
  • OSD
  • Series Extent
  • User Site ID: S1957CO013001
  • User Pedon ID: S1957CO013001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3897
  • NCSS Pedon Lab Data NASIS Record ID - 39543
  • Print Date: 11/24/2024

    • LOCATION

  • Location Description: Niwot Ridge, approximately 200 feet west of the Tundra Laboratory, Boulder County, Colorado.
  • State: Colorado
  • County: CO013—Boulder
  • Non-MLRA Soil Survey Area: CO643—Boulder County Area, Colorado

    • PEDON

  • Describers Name: A. J. Cline
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Sampled As Information:
  • Soil Name - Penitente
  • Classificaton Date - 7/1/1957
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 7/1/1957 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - other tree cover
  • 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

    5

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    Ao,Aoo—0 to 4 centimeters (0.0 to 1.6 inches); fragments. Lab sample # 40A29834. This is an organic horizon made up of undecomposed and partially decomposed plant refuse principally Kobresia roots and plant remains.
    A11—4 to 15 centimeters (1.6 to 5.9 inches); black (10YR 2/1), very dark gray (10YR 3/1), dry; loam; weak and moderate coarse granular structure; slightly hard, very friable; fragments; noneffervescent; clear smooth boundary. Lab sample # 40A29835. Temperature 50 degrees F.
    A12—15 to 24 centimeters (5.9 to 9.4 inches); very dark brown (10YR 2/2), very dark grayish brown (10YR 3/2), dry; loam; weak fine subangular blocky parts to moderate coarse granular structure; slightly hard, very friable; fragments; noneffervescent; moderately acid, pH 5.6, unspecified; gradual wavy boundary. Lab sample # 40A29836. Temperature 45 degrees F.
    Bir—24 to 37 centimeters (9.4 to 14.6 inches); dark brown (10YR 3/3), brown (10YR 5/3), dry; stony loam; weak and moderate fine and medium subangular blocky structure; hard, very friable; 10 percent clay films on lower surfaces of peds or rocks; very dark brown (10YR 2/2) and dark brown (10YR 3/3) around rock fragments; 25 percent by volume 250-425-600 millimeter unspecified fragments; noneffervescent; very strongly acid, pH 4.6, unspecified; gradual smooth boundary. Lab sample # 40A29837. Temperature 35 degrees F.; patchy - phpvsfiid 187927; patchy - phpvsfiid 187927
    B3—37 to 50 centimeters (14.6 to 19.7 inches); brown (10YR 4/3), pale brown (10YR 6/3), dry; stony loam; weak and moderate fine and medium subangular blocky structure; hard, very friable; 10 percent clay films on faces of peds; dark brown (10YR 3/3) around rock fragments; 40 percent by volume 250-425-600 millimeter unspecified fragments; noneffervescent; extremely acid, pH 4.4, unspecified; diffuse wavy boundary. Lab sample # 40A29838. The temperature of this horizon on the day sampled was approximately 32 degrees.; patchy - phpvsfiid 187928; patchy - phpvsfiid 187928
    C—50 to 65 centimeters (19.7 to 25.6 inches); olive brown (2.5Y 4/3), light yellowish brown (2.5Y 6/3), dry; stony sandy loam; weak medium subangular blocky structure; hard, very friable; dark brown (10YR 3/3) around rock fragments; 75 percent by volume 250-425-600 millimeter unspecified fragments; noneffervescent; very strongly acid, pH 4.8, unspecified. Lab sample # 40A29839. Temperature 27 degrees F.