IDENTIFIERS

  • Current Taxon Name (Soil Name): MARIAS
  • OSD
  • Series Extent
  • User Site ID: S1962MT105001
  • User Pedon ID: S1962MT105001
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 40A3336
  • NCSS Pedon Lab Data NASIS Record ID - 38451
  • Print Date: 11/13/2024

    • 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: 48.4518814
  • Std. Longitude: -107.2338028
  • Datum: WGS84
  • Township: 31N
  • Range: 35E
  • Section: 7
  • PLSS Details: 550 feet E and 150 feet N of S 1/4 corner
  • Location Description: Seven miles NW of Hinsdale on US Highway #2.
  • State: Montana
  • County: MT105—Valley
  • MLRA: 52—Brown Glaciated Plains
  • Non-MLRA Soil Survey Area: MT105—Valley County, Montana

    • PEDON

  • Describers Name: Grossman, Haderlie, Walker and Mogen.
  • Current Taxonomic Class: Fine, montmorillonitic, frigid Udorthentic Chromusterts
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - MARIAS
  • PSC - 25 to 100 cm.
  • Classificaton Date - 2/1/2010
  • Sampled As Information:
  • Soil Name - Marias
  • Classificaton Date - 8/20/1962
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

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

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 8/20/1962 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • 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

    2

    —

    —

    671

    —

    180

    381

    —

    —

    4.4

    18.9

    -12.2

    —

    —

    —

    —

    —

    —

    —

    —
    Ap—0 to 15 centimeters (0.0 to 5.9 inches); grayish brown (2.5Y 5/2), dark grayish brown (2.5Y 4/2), moist; clay; strong very fine granular structure; hard, friable, moderately sticky, very plastic; fragments; slight effervescence; abrupt boundary. Lab sample # 40A25987. Crust on surface following hard rains is 1/32 inch thick with outline of granules distinct.
    A12—15 to 28 centimeters (5.9 to 11.0 inches); grayish brown (2.5Y 5/2), dark grayish brown (2.5Y 4/2), moist; clay; strong coarse subangular blocky parts to moderate very fine angular blocky structure; very hard, firm, moderately sticky, very plastic; fragments; slight effervescence; gradual boundary. Lab sample # 40A25988. Flat faces of blocks have glossy appearance.
    A13—28 to 53 centimeters (11.0 to 20.9 inches); grayish brown (2.5Y 5/2), dark grayish brown (2.5Y 4/2), moist; clay; strong coarse subangular blocky parts to moderate very fine angular blocky structure; very hard, firm, moderately sticky, very plastic; slickensides (pedogenic); fragments; slight effervescence; gradual boundary. Lab sample # 40A25989. Few poorly defined slickensides with surfaces 30 degrees from horizontal; surfaces of blocks and of slickensides have glossy appearance.
    A14—53 to 69 centimeters (20.9 to 27.2 inches); gray (2.5Y 5/1), dark grayish brown (2.5Y 4/2), moist; clay; strong coarse subangular blocky parts to moderate very fine angular blocky structure; distinct slickensides (pedogenic); fragments; slight effervescence; clear smooth boundary. Lab sample # 40A25990. Distinct slickensides having surfaces about 20 degrees to 40 degrees from horizontal, observable in the moist soil at below field capacity; slickenside surfaces are intersecting, with surfaces easily exposed 6 to 10 inches in diameter; surfaces of blocks have glossy appearance.
    C1cs—69 to 91 centimeters (27.2 to 35.8 inches); gray (5Y 5/1), olive (5Y 5/3), moist; clay; moderate very coarse prismatic parts to moderate very fine granular structure; very hard, firm, moderately sticky, very plastic; 10 percent clay films on faces of peds; fine threadlike gypsum crystals, unspecified and 21 percent very coarse gypsum crystals, unspecified; fragments; slight effervescence; gradual boundary. Lab sample # 40A25991. patchy - phpvsfiid 184444; patchy - phpvsfiid 184444
    C1cs2—91 to 122 centimeters (35.8 to 48.0 inches); gray (5Y 5/1), olive (5Y 5/3), moist; clay; moderate very coarse prismatic parts to moderate very fine granular structure; very hard, firm, moderately sticky, very plastic; 10 percent clay films on faces of peds; fine threadlike gypsum crystals, unspecified and 21 percent very coarse gypsum crystals, unspecified; fragments; slight effervescence. Lab sample # 40A25992. Horizon 27-48 inches split for purpose of sampling.; patchy - phpvsfiid 184445; patchy - phpvsfiid 184445
    C2cs1—122 to 155 centimeters (48.0 to 61.0 inches); gray (5Y 5/1) and light gray (5Y 7/1), very dark gray (5Y 3/1), moist; clay; moderate very coarse prismatic parts to very fine granular structure; very hard, firm, moderately sticky, very plastic; 10 percent clay films on faces of peds; medium gypsum crystals, unspecified in cracks and 21 percent very coarse gypsum crystals, unspecified; fragments; slight effervescence; gradual boundary. Lab sample # 40A25993. patchy - phpvsfiid 184446; patchy - phpvsfiid 184446
    C2cs2—155 to 191 centimeters (61.0 to 75.2 inches); gray (5Y 5/1) and light gray (5Y 7/1), very dark gray (5Y 3/1), moist; clay; moderate very coarse prismatic parts to very fine granular structure; very hard, firm, moderately sticky, very plastic; 10 percent clay films on faces of peds; medium gypsum crystals, unspecified in cracks and 3 percent very coarse gypsum crystals, unspecified; fragments; slight effervescence. Lab sample # 40A25994. Horizon 48-75 inches was split for sampling.; patchy - phpvsfiid 184447; patchy - phpvsfiid 184447
    C3cs—191 to 221 centimeters (75.2 to 87.0 inches); gray (5Y 5/1), very dark gray (5Y 3/1), moist; clay; very fine granular parts to very coarse prismatic structure; hard, firm, moderately sticky, very plastic; 30 percent clay films on faces of peds; 3 percent gypsum masses and 1 percent gypsum crystals, unspecified in cracks; fragments; slight effervescence; gradual boundary. Lab sample # 40A25995. Distinct horizontal layers of light gray (5Y 7/1) 1/8 inch thick to 1 to 1 1/2 inches apart. Films on concave prism faces; common nodular clusters of gypsum, few horizontal seams.
    IIC3—221 to 246 centimeters (87.0 to 96.9 inches); gray (5Y 6/1), dark gray (5Y 4/1), moist; stratified silty clay loam to silt; strong very fine subangular blocky parts to moderate medium platy structure; hard, friable, moderately sticky, moderately plastic; 3 percent very coarse gypsum masses; fragments; slight effervescence; clear irregular boundary. Lab sample # 40A25996
    IIC4—246 to 272 centimeters (96.9 to 107.1 inches); light yellowish brown (2.5Y 6/3), dark grayish brown (2.5Y 4/2), moist; silt loam; moderate coarse platy structure; slightly hard, friable, slightly sticky, slightly plastic; 1 percent gypsum crystals, unspecified; fragments. Lab sample # 40A25997