IDENTIFIERS

  • Current Taxon Name (Soil Name): Mixpie
  • OSD
  • Series Extent
  • User Site ID: S1986-TX043-004
  • User Pedon ID: S1986-TX043-004-copy
  • Vegetation Plot ID: S1986-TX043-004
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 86P0641
  • NCSS Pedon Lab Data NASIS Record ID - 58935
  • Print Date: 11/12/2024
  • 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: 29.2727083
  • Std. Longitude: -103.1572278
  • Datum: WGS84
  • Location Description: Brewster County, TX: From NPS Panther junction HQ, 8 km SE on Rio Grande Village Rd, 45 meters S on Service Rd, 12 meters W.
  • Country: US—United States
  • State: Texas
  • County: TX043—Brewster
  • MLRA: 42—Southern Desertic Basins, Plains, and Mountains
  • MLRA Soil Survey Area: SW-MAF—Marfa, Texas
  • Non-MLRA Soil Survey Area: TX621—Big Bend National Park, Texas
  • 7.5 Minute USGS Quad: 29103-C2—Panther Junction, Texas
  • PEDON

  • Describers Name: Jack Williams, Rusty Dowell, Rex Cochran, and Jerry Rives
  • Current Taxonomic Class: Loamy-skeletal, mixed, superactive, thermic, shallow Ustic Petrocalcids
  • Current Taxon Kind: series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 4
  • Correlated Information:
  • Soil Name - Mixpie
  • PSC - 0 to 16 cm.
  • Classificaton Date - 8/7/2015
  • Classifier - Lynn Loomis
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no
  • Certification Status: certified
  • QC Status: level 1


  • SITE

  • Landscape: piedmont slope
  • Landform: fan remnant
  • Geomorphic Component Hills: head slope
  • Hill Slope Profile: toeslope
  • Slope Position: upper third
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments:
  • Benchmark Soil?: no
  • VEGETATION

    SITE OBSERVATION

  • Observation Date: 5/1/1986 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - grass/herbaceous cover
  • Site Obs. Cover Kind 2 - rangeland, grassland
  • 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

    AGLE

    ARPUW

    LATR2

    Agave lechuguilla

    Aristida purpurea var. wrightii

    Larrea tridentata

    lechuguilla

    Wright's threeawn

    creosote bush

    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    petrocalcic

    16 - 64

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

    ochric epipedon

    petrocalcic horizon

    0—3

    16—64

    —-

    —-

    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

    986

    90

    326

    706

    19.5

    PRISM

    A—0 to 3 centimeters (0.0 to 1.2 inches); pale brown (10YR 6/3) interior, brown (10YR 4/3) interior, moist; gravelly sandy loam; moderate very fine subangular blocky structure; slightly hard, very friable; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 30 percent by volume 2-?-75 millimeter igneous, unspecified fragments; gr-l of Field estimated texture class; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3739; dry when described; observed in trench. 5-10% surface fragments partially coated with carbonates. Few films and threads of CaCO3. Films and threads of CaCO3 on undersides of some pebbles.; few very fine roots throughout; effervescence is continuous
    Bk—3 to 16 centimeters (1.2 to 6.3 inches); pale brown (10YR 6/3) interior, brown (10YR 4/3) interior, moist; very gravelly sandy loam; moderate very fine subangular blocky structure; slightly hard, very friable; 2.5 very fine roots throughout and 2.5 medium roots throughout; 2.5 very fine tubular pores; 55 percent by volume 2-?-75 millimeter igneous, unspecified fragments; grv-l of Field estimated texture class; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 86P3740; dry when described; observed in trench. Thin coatings of CaCO3 on undersides of most pebbles. Many films and threads of CaCO3. Most fragments less than 3 cm across with few to 10 cm across and occassional cobbles.; common medium roots throughout; common very fine roots throughout; effervescence is continuous
    Bkkm—16 to 64 centimeters (6.3 to 25.2 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/3) interior, moist; cemented material; 35 percent by volume 8-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 86P3741; dry when described; observed in trench. 35% by volume rock fragments imbedded in horizon upto about 10 cm. Igneous and limestone gravels and cobbles. Laminear cap about 2 cm thick in about 10% of area. Hardness of 2.; effervescence is continuous
    C—64 to 77 centimeters (25.2 to 30.3 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/3) interior, moist; extremely gravelly loamy coarse sand; very hard, friable; 11 percent coarse platy carbonate concretions; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; extremely gravelly sandy loam of Field estimated texture class; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3742; dry when described; observed in trench. Pebbles upto 10 cm across and concretions of CaCO3.; common coarse carbonate concretions concentrations; effervescence is continuous
    2Bk—77 to 99 centimeters (30.3 to 39.0 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/4) interior, moist; very gravelly loamy coarse sand; soft, loose; 55 percent by volume 2-?-75 millimeter igneous, unspecified fragments; grv-sl of Field estimated texture class; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3743; dry when described; observed in trench. All pebbles completely coated with carbonates. Pebbles well graded upto 3 cm across.; effervescence is continuous
    3Bk—99 to 150 centimeters (39.0 to 59.1 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/3) interior, moist; extremely gravelly sandy loam; slightly hard, very friable; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt irregular boundary. Lab sample # 86P3744; dry when described; observed in trench. Coatings on pebbles and cobbles upto 3 mm thick. Few cobbles.; effervescence is continuous
    4Ck—150 to 177 centimeters (59.1 to 69.7 inches); very pale brown (10YR 7/4) interior, yellowish brown (10YR 5/4) interior, moist; extremely gravelly coarse sandy loam; soft, loose; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt irregular boundary. Lab sample # 86P3745; dry when described; observed in trench. Few thin coatings of CaCO3 on undersides of some pebbles. Gravel upto 3 cm across and well graded.; effervescence is continuous
    5Ck—177 to 185 centimeters (69.7 to 72.8 inches); pinkish white (7.5YR 8/2) interior, pink (7.5YR 7/4) interior, moist; extremely gravelly coarse sandy loam; slightly hard, very friable; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt irregular boundary. Lab sample # 86P3746; dry when described; observed in trench. Coatings thin to about 3 mm on fragments. Well graded gravel upto 10 cm across. Consistence due to cementing of carbonates.; effervescence is continuous
    6Ck—185 to 200 centimeters (72.8 to 78.7 inches); very pale brown (10YR 7/4) interior, yellowish brown (10YR 5/4) interior, moist; extremely gravelly loamy coarse sand; slightly hard, very friable; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; grx-cosl of Field estimated texture class; strong effervescence, by hcl, 1n. Lab sample # 86P3747; dry when described; observed in trench. Thin carbonate coatings on lowersides of most pebbles, well graded gravel upto 5 cm across.; effervescence is discontinuous