IDENTIFIERS

  • Current Taxon Name (Soil Name): Corazones
  • OSD
  • Series Extent
  • User Site ID: S1986-TX043-001
  • User Pedon ID: S1986-TX043-001-copy
  • Vegetation Plot ID: S1986-TX043-001
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 86P0638
  • NCSS Pedon Lab Data NASIS Record ID - 58932
  • 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: 29.2003222
  • Std. Longitude: -103.0299972
  • Datum: WGS84
  • Location Description: Brewster County, TX: From NPS Panther junction HQ, 23.3 km SE on Rio Grande Village Rd, 10 meters N.
  • 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-B1—San Vicente, Texas

    • PEDON

  • Describers Name: Jack Williams, Rusty Dowell, Rex Cochran, and Jerry Rives
  • Current Taxonomic Class: Loamy-skeletal, mixed, superactive, hyperthermic Typic Haplocalcids
  • Current Taxon Kind: series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 1
  • Correlated Information:
  • Soil Name - Corazones
  • PSC - 25 to 100 cm.
  • Classificaton Date - 7/16/2015
  • Classifier - Lynn Loomis
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - aridic (torric)
  • Moisture Subclass - typic
  • 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: lower third
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments: 3.00 percent nonflat subrounded indurated 2- to 75-millimeter limestone, unspecified, 80.00 percent nonflat subangular indurated 2- to 75-millimeter igneous, unspecified,
  • 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, shrubby
  • 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

    DAPU7

    LATR2

    OPST

    Dasyochloa pulchella

    Larrea tridentata

    Opuntia stanlyi

    low woollygrass

    creosote bush

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    —

    —

    —

    —

    —

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    —

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

    ochric epipedon

    calcic horizon

    gypsic horizon

    0—11

    13—132

    132—200

    —-

    —-

    —-
    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

    —

    —

    622

    —

    135

    258

    907

    —

    21.2

    —

    —

    —

    —

    —

    —

    —

    PRISM

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    A—0 to 3 centimeters (0.0 to 1.2 inches); light gray (10YR 7/2) exterior, brown (10YR 5/3) exterior, moist; extremely gravelly loam; moderate medium subangular blocky, and weak fine subangular blocky structure; slightly hard, friable; 0.5 very fine tubular pores; 85 percent by volume 2-39-75 millimeter mixed fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3709; dry when described; observed in trench. Pitwall very dry and unstable unable to get B.D. samples.; effervescence is continuous
    Ak—3 to 11 centimeters (1.2 to 4.3 inches); very pale brown (10YR 7/3) exterior, grayish brown (10YR 5/2) exterior, moist; very gravelly loam; moderate medium subangular blocky structure; slightly hard, friable; 0.5 very fine roots throughout; 5.5 very fine tubular pores; 30 percent coarse carbonate masses; 45 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3710; dry when described; observed in trench. Many threads and films of CaCO3. Coatings on pebbles.; many coarse soft masses of carbonate concentrations; few very fine roots throughout; effervescence is continuous
    Bk1—11 to 22 centimeters (4.3 to 8.7 inches); very pale brown (10YR 7/3) exterior, pale brown (10YR 6/3) exterior, moist; very gravelly loam; moderate very fine subangular blocky structure; slightly hard, very friable; 2.5 very fine roots throughout; 5.5 very fine tubular pores; 30 percent coarse carbonate masses; 50 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3711; dry when described; observed in trench. Consistence about 1/2 degree softer than Ak. More visable conglomerate Ak.; many coarse soft masses of carbonate concentrations; common very fine roots throughout; effervescence is continuous
    Bk2—22 to 43 centimeters (8.7 to 16.9 inches); very pale brown (10YR 7/3) exterior, pale brown (10YR 6/3) exterior, moist; very gravelly loam; moderate very fine subangular blocky structure; slightly hard, very friable; 2.5 very fine roots throughout; 5.5 very fine tubular pores; 30 percent coarse carbonate masses; 40 percent by volume 2-39-75 millimeter mixed fragments; violent effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 86P3712; dry when described; observed in trench. many coarse soft masses of carbonate concentrations; common very fine roots throughout; effervescence is continuous
    Bk3—43 to 69 centimeters (16.9 to 27.2 inches); very pale brown (10YR 8/3) exterior, very pale brown (10YR 7/3) exterior, moist; very gravelly loam; moderate very fine subangular blocky structure; soft, very friable; 2.5 very fine roots throughout; 2.5 very fine tubular pores; 30 percent fine carbonate masses; 55 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3713; dry when described; observed in trench. Thin coatings of CaCO3 on fragments.; many fine soft masses of carbonate concentrations; common very fine roots throughout; effervescence is continuous
    B'k1—69 to 85 centimeters (27.2 to 33.5 inches); very pale brown (10YR 7/3) exterior, pale brown (10YR 6/3) exterior, moist; extremely gravelly sandy loam; moderate very fine subangular blocky structure; soft, very friable; 0.5 very fine roots throughout; 2.5 very fine tubular pores; 30 percent fine carbonate masses; 80 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3714; dry when described; observed in trench. Horizon of most visable conglomerates. Thin coatings on fragments.; many fine soft masses of carbonate concentrations; few very fine roots throughout; effervescence is continuous
    B'k2—85 to 115 centimeters (33.5 to 45.3 inches); pink (7.5YR 7/4) exterior, brown (7.5YR 5/4) exterior, moist; extremely gravelly sandy loam; weak very fine subangular blocky structure; slightly hard, very friable; 0.5 very fine tubular pores; 11 percent fine carbonate masses; 65 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3715; dry when described; observed in trench. Coatings of CaCO3 on mostly undersides of fragments.; common fine soft masses of carbonate concentrations; effervescence is continuous
    2Bk—115 to 132 centimeters (45.3 to 52.0 inches); very pale brown (10YR 7/3) exterior, yellowish brown (10YR 5/4) exterior, moist; extremely gravelly sandy clay loam; weak very fine subangular blocky structure; slightly hard, very friable; 0.5 very fine tubular pores; 1 percent fine carbonate masses; 85 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3716; dry when described; observed in trench. Few films and threads of CaCO3. Few coatings on lower sides of pebbles. About 1/2 of above horizon. Fragments mostly less than 5 cm.; few fine soft masses of carbonate concentrations; effervescence is continuous
    2By1—132 to 175 centimeters (52.0 to 68.9 inches); light brown (7.5YR 6/4) exterior, brown (7.5YR 5/4) exterior, moist; extremely gravelly sandy clay loam; weak very fine granular structure; slightly hard, very friable; 0.5 very fine roots throughout; 5.5 very fine tubular pores; 11 percent fine gypsum crystals, unspecified; 85 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3717; dry when described; observed in trench. Gypsum crystals attched to rock. Very fine to medium size crystals. Few films and threads of CaOC3. Most fragments mostly less than 2 cm across.; common fine gypsum crystals concentrations; few very fine roots throughout; effervescence is continuous
    2By2—175 to 200 centimeters (68.9 to 78.7 inches); light brown (7.5YR 6/4) exterior, brown (7.5YR 5/4) exterior, moist; very gravelly sandy clay loam; weak very fine granular structure; slightly hard, friable; 2.5 very fine tubular pores; 1 percent fine gypsum crystals, unspecified; 60 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3718; dry when described; observed in trench. Occasional cobbles. Only about 20% as much gypsum as in above horizon. Few very fine threads and films of carbonates on rocks.; few fine gypsum crystals concentrations; effervescence is continuous