IDENTIFIERS

  • Current Taxon Name (Soil Name): Corazones
  • OSD
  • Series Extent
  • User Site ID: S1986-TX043-003
  • User Pedon ID: S1986-TX043-003-copy
  • Vegetation Plot ID: S1986-TX043-003
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 86P0640
  • NCSS Pedon Lab Data NASIS Record ID - 58934
  • 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: 29.2563111
  • Std. Longitude: -103.1068556
  • Datum: WGS84
  • Location Description: Brewster County, TX: From NPS Panther junction HQ, 13.4 km SE on Rio Grande Village Rd 30 meters E on service rd.
  • Map Unit: COC—Corazones very gravelly sandy loam, 1 to 8 percent slopes
  • 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-C1—Roys Peak, Texas

    • PEDON

  • Describers Name: Jack Williams, Rusty Dowell, Rex Cochran, and Jerry Rives
  • Current Taxonomic Class: Loamy-skeletal, mixed, superactive, thermic Ustic Haplocalcids
  • Current Taxon Kind: series
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 3
  • Correlated Information:
  • Soil Name - Corazones
  • PSC - 25 to 100 cm.
  • Classificaton Date - 2/13/2018
  • 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: 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

    ARWR

    LATR2

    Agave lechuguilla

    Aristida wrightii

    Larrea tridentata

    lechuguilla

    —

    creosote bush

    —

    —

    —

    —

    —

    —

    —

    —

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

    ochric epipedon

    calcic horizon

    argillic horizon

    0—5

    5—153

    153—180

    —-

    —-

    —-
    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

    3

    —

    —

    818

    —

    135

    287

    812

    —

    20.3

    —

    —

    —

    —

    —

    —

    —

    PRISM

    —

    —
    A—0 to 5 centimeters (0.0 to 2.0 inches); brown (10YR 5/3) interior, brown (10YR 4/3) interior, moist; gravelly fine sandy loam; moderate very fine subangular blocky structure; slightly hard, very friable; 2.5 very fine roots throughout; 2.5 very fine tubular pores; 25 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3729; dry when described; observed in trench. 20% canopy cover. Few worm casts. Most gravels less than 2 cm across with few up to 5 cm. Frag are not coated with CaCO3/; common very fine roots throughout; effervescence is continuous
    Bk1—5 to 19 centimeters (2.0 to 7.5 inches); pale brown (10YR 6/3) interior, brown (10YR 4/3) interior, moist; very gravelly fine sandy loam; moderate very fine subangular blocky structure; slightly hard, very friable; 5.5 very fine roots throughout and 2.5 medium roots throughout; 2.5 very fine tubular pores; 45 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3730; dry when described; observed in trench. Common films and threads of CaCO3. Thin coatings of CaCO3 on lower sides of pebbles. Texture is almost loamy to sandy clay loam.; many very fine roots throughout; common medium roots throughout; effervescence is continuous
    Bk2—19 to 30 centimeters (7.5 to 11.8 inches); pale brown (10YR 6/3) interior, dark yellowish brown (10YR 4/4) interior, moist; very gravelly sandy clay loam; moderate very fine subangular blocky structure; slightly hard, very friable; 5.5 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; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3731; dry when described; observed in trench. Many threads and films, pebbles thinly coated completely.; many very fine roots throughout; common medium roots throughout; effervescence is continuous
    Bk3—30 to 50 centimeters (11.8 to 19.7 inches); pale brown (10YR 6/3) interior, brown (10YR 4/3) interior, moist; extremely gravelly sandy clay loam; weak very fine subangular blocky structure; soft, loose; 2.5 fine roots throughout; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3732; dry when described; observed in trench. Fragments are thinly and thickly coated. Many threads and films. Most frag up to 5 cm across horizon have maximum visible carbonates.; common fine roots throughout; effervescence is continuous
    Bk4—50 to 76 centimeters (19.7 to 29.9 inches); very pale brown (10YR 7/4) interior, yellowish brown (10YR 5/4) interior, moist; extremely gravelly loam; weak very fine subangular blocky structure; soft, loose; 0.5 very fine roots throughout; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3733; dry when described; observed in trench. Pebbles are well graved and upto 10 cm across. Thin to thickly coated with carbonates. Few voids.; few very fine roots throughout; effervescence is continuous
    2Bk1—76 to 87 centimeters (29.9 to 34.3 inches); light brown (7.5YR 6/4) interior, brown (7.5YR 4/4) interior, moist; extremely gravelly coarse sandy loam; single grain; soft, loose; 0.5 very fine roots throughout; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3734; dry when described; observed in trench. Some of pebbles coated on lowersides. Most pebbles less than 1 cm across, with a few upto 2 cm across.; few very fine roots throughout; effervescence is continuous
    2Bk2—87 to 114 centimeters (34.3 to 44.9 inches); pink (7.5YR 7/4) interior, brown (7.5YR 5/4) interior, moist; very gravelly sandy loam; weak very fine subangular blocky structure; slightly hard, very friable; 0.5 very fine roots throughout; 2.5 very fine tubular pores; 55 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3735; dry when described; observed in trench. Visible films and threads. Pebbles thinly coated on lower 2/3 of fragments. Frag mostly less than 3 cm across and well graded. Few less than 5% cobbles.; few very fine roots throughout; effervescence is continuous
    2Bk3—114 to 153 centimeters (44.9 to 60.2 inches); light brown (7.5YR 6/4) interior, brown (7.5YR 4/4) interior, moist; extremely gravelly coarse sandy loam; weak very fine subangular blocky structure; slightly hard, very friable; 2.5 very fine tubular pores; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; very slight effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3736; dry when described; observed in trench. Frag have few thin patchy CaCO3 on lowersides. Heavily crossbedded with most frag less than 3 cm across but some upto 5 cm across.; effervescence is discontinuous
    3Bt—153 to 180 centimeters (60.2 to 70.9 inches); light brown (7.5YR 6/4) interior, brown (7.5YR 5/4) interior, moist; extremely gravelly sandy clay; weak very fine subangular blocky structure; slightly hard, very friable; 75 percent by volume 2-?-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3737; dry when described; observed in trench. Few patchy CaCO3 on lowersides of some pebbles. Texture could be sandy clay loam.; effervescence is discontinuous
    3Bk—180 to 200 centimeters (70.9 to 78.7 inches); light brown (7.5YR 6/4) interior, brown (7.5YR 4/4) interior, moist; extremely gravelly sandy clay; moderate very fine subangular blocky structure; hard, very friable; 0.5 very fine tubular pores; 80 percent by volume 2-?-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3738; dry when described; observed in trench. Few threads and films. Thin patchy coatings of CaCO3 on some pebbles. 20 cm pocket of caliche coated cobbles (about 10 cm across), mostly well graded gravels upto 3 cm across.; effervescence is discontinuous