IDENTIFIERS

  • Current Taxon Name (Soil Name): Mulvahill
  • OSD
  • Series Extent
  • User Site ID: S2014OR013025
  • User Pedon ID: S2014OR013025
  • Vegetation Plot ID: 2014OR013025
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - KSSL
  • Lab Pedon # - 20N0027
  • User Project ID: 2022-1RED-OR618-INITIAL
  • Project Name: Crook County Area, Oregon - Initial
  • Print Date: 12/6/2025

    • 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: 44.3412780
  • Std. Longitude: -120.1699000
  • Datum: WGS84
  • Country: US—United States
  • State: Oregon
  • County: OR013—Crook
  • MLRA: 10—Central Rocky and Blue Mountain Foothills
  • Regional Office: 1—Portland, OR
  • MLRA Soil Survey Area: NW-RED—Redmond, Oregon
  • Non-MLRA Soil Survey Area: OR618—Crook County Area, Oregon
  • 7.5 Minute USGS Quad: 44120-C2—Williams Prairie, Oregon

    • PEDON

  • Describers Name: Kurt Moffitt and Jim David
  • Current Taxonomic Class: Fine, smectitic Aquic Palecryolls
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: NASIS
  • Sampled As Information:
  • Soil Name - Mulvahill (flagged as OSD)
  • Taxonomic Class - Fine, smectitic Aquic Palecryolls
  • Taxon Kind - series
  • PSC - 54 to 89 cm.
  • Classificaton Date - 5/27/2015
  • Classifier - Kurt Moffitt
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - xeric
  • Moisture SUBClass - aquic
  • Dynamic Soil Properties:
  • Pedoderm Loose Cover Indicator - no
  • Hydric: yes
  • Certification Status: not certified


    • SITE

  • Parent Material: alluvium
  • Landform: stream terrace
  • Geomorphic Component Terraces: tread
  • Hill Slope Profile: toeslope
  • Slope Complexity: simple
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Drainage Pattern: dendritic
  • Drainage Class: somewhat poorly
  • Flooding: frequent flooding for brief periods begining in apr
  • Ponding: none ponding
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

  • Ecological Sites. (Click Ecological Site ID For Link to EDIT.)
    Ecological Site ID Ecological Site Name Correlation Data Classifier
    R010XY001OR COLD WET MEADOW May 27 2015 Kurt Moffitt

    • SITE OBSERVATION

  • Observation Date: 10/2/2014 (actual site observation date)
  • Data Collector: Kurt Moffitt and Jim David
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - sunny
  • Current Air Temp - 21
  • Rosgen Stream Type E
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    CANE2

    DECA18

    Carex nebrascensis

    Deschampsia caespitosa

    Nebraska sedge

    tufted hairgrass

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

    mollic epipedon

    volcanic glass

    episaturation

    volcanic glass

    argillic horizon

    endosaturation

    redox concentrations

    redox depletions with chroma 2 or less

    cambic horizon

    reduced matrix

    0—41

    0—10

    0—10

    41—54

    54—89

    54—185

    54—185

    54—185

    89—157

    157—185

    —41—

    —10—

    —10—

    —13—

    —35—

    —131—

    —131—

    —131—

    —68—

    —28—
    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

    0.5

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    —

    1350

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    —

    —

    —

    —

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    —

    —

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    Ap1—0 to 10 centimeters (0.0 to 3.9 inches); very dark brown (10YR 2/2) broken face, very dark grayish brown (10YR 3/2) broken face, dry; ashy silt loam; 24 percent clay; moderate very fine granular structure; soft, very friable, slightly sticky, slightly plastic; low excavation difficulty; many (20.0) very fine roots throughout and many (8.0) fine roots throughout; common very fine dendritic tubular and common fine irregular pores; fragments; noneffervescent; clear wavy boundary.; moderately dry when described; observed in trench
    Ap2—10 to 41 centimeters (3.9 to 16.1 inches); black (10YR 2/1) broken face, dark gray (10YR 4/1) broken face, dry; clay; 42 percent clay; strong medium platy parts to moderate fine subangular blocky structure; moderately hard, very firm, moderately sticky, very plastic; moderate excavation difficulty; common (3.0) very fine roots top of horizon; common fine dendritic tubular pores; fragments; noneffervescent; moderately alkaline, pH 7.9, pH meter; abrupt wavy boundary. Lab sample # 20N00098; slightly dry when described; observed in trench
    2Bwb—41 to 54 centimeters (16.1 to 21.3 inches); gray (10YR 6/1) broken face and very dark grayish brown (10YR 3/2) broken face sandy loam; 14 percent clay; moderate thick platy structure; slightly hard, friable, slightly sticky, slightly plastic; low excavation difficulty; moderately few (0.2) very fine roots throughout and moderately few (0.2) medium roots throughout and moderately few (0.7) fine roots throughout; many very fine irregular and common fine dendritic tubular pores; fragments; noneffervescent; moderately alkaline, pH 8.1, pH meter; clear smooth boundary. Lab sample # 20N00099; moderately dry when described; observed in trench. Common coarse crotavina's that are filled in with 10YR 2/2 Clay and Clay Loam.; Jim David has supplemental data from nearby pedons that shows that this is the buried Mazama ash layer.
    3Btb—54 to 89 centimeters (21.3 to 35.0 inches); very dark grayish brown (10YR 3/2) broken face, gray (10YR 5/1) broken face, dry; clay; 53 percent clay; strong coarse prismatic structure; very hard, firm, moderately sticky, very plastic; moderate excavation difficulty; very few (0.2) very fine roots throughout and moderately few (0.5) fine roots throughout; few very fine dendritic tubular pores; 40 percent distinct clay films on all faces of peds; 2 percent fine faint iron-manganese masses in matrix and 5 percent fine faint iron depletions in matrix; fragments; noneffervescent; moderately alkaline, pH 8.2, pH meter; clear smooth boundary. Lab sample # 20N00100; moist when described; observed in trench
    3Bwb1—89 to 124 centimeters (35.0 to 48.8 inches); dark grayish brown (10YR 4/2) broken face, light brownish gray (10YR 6/2) broken face, dry; clay loam; 33 percent clay; moderate coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; low excavation difficulty; very few (0.1) very fine roots throughout; few very fine dendritic tubular and few fine dendritic tubular pores; faint silt coats; 5 percent iron-manganese masses in matrix and 8 percent medium prominent iron depletions in matrix surrounding redox concentrations; fragments; noneffervescent; moderately alkaline, pH 8.4, pH meter; clear smooth boundary. Lab sample # 20N00101; moderately moist when described; observed in trench
    3Bwb2—124 to 157 centimeters (48.8 to 61.8 inches); dark grayish brown (10YR 4/2) broken face, light brownish gray (10YR 6/2) broken face, dry; clay loam; 33 percent clay; moderate coarse subangular blocky structure; moderately hard, friable, moderately sticky, moderately plastic; low excavation difficulty; very few (0.1) very fine roots throughout and very few (0.1) medium roots throughout; few very fine dendritic tubular pores; faint silt coats; 3 percent fine prominent iron-manganese nodules in matrix and 15 percent medium distinct iron depletions in matrix surrounding redox concentrations and 20 percent medium prominent dark yellowish brown (10YR 4/6), moist, iron-manganese masses in matrix; fragments; noneffervescent; moderately alkaline, pH 8.1, pH meter; abrupt smooth boundary. Lab sample # 20N00102; very moist when described; observed in trench. There is a very small stone line of few fine gravels at the base of this horizon.
    4C—157 to 185 centimeters (61.8 to 72.8 inches); greenish black (5GY 2.5/1) broken face, light yellowish brown (2.5Y 6/3) broken face, dry; very gravelly sandy clay loam; 24 percent clay; weak medium subangular blocky structure; soft, friable, moderately sticky, moderately plastic; high excavation difficulty; very few (0.2) very fine roots throughout; common very fine irregular and few very fine dendritic tubular pores; reduced matrix; 55 percent by volume nonflat rounded indurated 2-30-75 millimeter mixed fragments observed by visual inspection method; noneffervescent; moderately alkaline, pH 8.1, pH meter. Lab sample # 20N00103; wet, non-satiated when described; observed in trench