IDENTIFIERS

  • Current Taxon Name (Soil Name): Corazones
  • OSD
  • Series Extent
  • User Site ID: S1986-TX043-002
  • User Pedon ID: S1986-TX043-002-copy
  • Vegetation Plot ID: S1986-TX043-002
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 86P0639
  • NCSS Pedon Lab Data NASIS Record ID - 58933
  • Print Date: 4/27/2025

    • 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: 29.2244583
  • Std. Longitude: -103.0584639
  • Datum: WGS84
  • Location Description: Brewster County, TX: From NPS Panther junction HQ, 18.7 km SE on Rio Grande Village Rd, 50 feet E on Service Rd, 9 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 #: 2
  • 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: middle third
  • Slope Shape Down: convex
  • Runoff: medium
  • Drainage Class: well
  • Surface Fragments: 91.00 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

    AGLE

    LATR2

    Agave lechuguilla

    Larrea tridentata

    lechuguilla

    creosote bush

    —

    —

    —

    —

    —

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

    ochric epipedon

    calcic horizon

    cambic horizon

    argillic horizon

    0—15

    3—170

    15—44

    170—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

    1

    —

    —

    685

    —

    135

    266

    888

    —

    21

    —

    —

    —

    —

    —

    —

    —

    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; gravelly loam; moderate very fine subangular blocky structure; slightly hard, very friable; 5.5 very fine tubular pores; 20 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3719; dry when described; observed in trench. Many visable roots.; effervescence is continuous
    Ak—3 to 15 centimeters (1.2 to 5.9 inches); light gray (10YR 7/2) exterior, brown (10YR 5/3) exterior, moist; gravelly fine sandy loam; moderate very fine subangular blocky structure; slightly hard, very friable; 0.5 very fine roots throughout; 5.5 very fine tubular pores; 30 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 86P3720; dry when described; observed in trench. Many films and threads of CaCO3 and pebbles coated with CaCO3.; few very fine roots throughout; effervescence is continuous
    Bw1—15 to 30 centimeters (5.9 to 11.8 inches); pink (7.5YR 7/4) exterior, brown (7.5YR 5/4) exterior, moist; gravelly loam; weak very fine subangular blocky structure; soft, very friable; 0.5 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; clear smooth boundary. Lab sample # 86P3721; dry when described; observed in trench. Many threads and films, pebbles mostly complete, coated with CaCO3 some only partially coated.; few very fine roots throughout; effervescence is continuous
    Bw2—30 to 44 centimeters (11.8 to 17.3 inches); pink (7.5YR 8/4) exterior, brown (7.5YR 5/4) exterior, moist; very gravelly loam; weak very fine subangular blocky structure; soft, very friable; 2.5 very fine roots throughout and 2.5 fine roots throughout; 2.5 very fine tubular pores; 45 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3722; dry when described; observed in trench. Maximum visable CaCO3 accumulations, few pebbles up to 5 cm across only partially coated.; common fine roots throughout; common very fine roots throughout; effervescence is continuous
    2Bk1—44 to 76 centimeters (17.3 to 29.9 inches); pink (7.5YR 8/4) exterior, brown (7.5YR 5/4) exterior, moist; extremely gravelly sandy clay loam; single grain; loose, loose; 0.5 very fine roots throughout and 0.5 fine and medium roots throughout; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3723; dry when described; observed in trench. Thin coatings of CaCO3 on pebbles.; few fine and medium roots throughout; few very fine roots throughout; effervescence is continuous
    2Bk2—76 to 95 centimeters (29.9 to 37.4 inches); light brown (7.5YR 6/4) exterior, brown (7.5YR 5/4) exterior, moist; extremely gravelly coarse sandy loam; weak very fine subangular blocky structure; hard, very friable; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3724; dry when described; observed in trench. Common films and threads of CaCO3, fragments only partially coated with CaCO3. Most frag less than 3 cm across. 95% igneous and 5% limestone.; effervescence is continuous
    2Bk3—95 to 117 centimeters (37.4 to 46.1 inches); light brown (7.5YR 6/4) exterior, brown (7.5YR 5/4) exterior, moist; extremely gravelly sandy clay loam; single grain; slightly hard, very friable; 90 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 86P3725; dry when described; observed in trench. 5% voids, few thic coatings of CaCO3 on undersides of some fragments. 90% fragments mostly less than 2 cm across.; effervescence is continuous
    2Bk4—117 to 141 centimeters (46.1 to 55.5 inches); light brown (7.5YR 6/4) exterior, brown (7.5YR 5/4) exterior, moist; extremely gravelly sandy clay loam; single grain; slightly hard, very friable; 60 percent by volume 2-?-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3726; dry when described; observed in trench. Few films and threads of CaCO3, thin coatings of CaCO3 on undersides of most fragments. Most fragments less than 2 cm across. 5% voids.; effervescence is discontinuous
    2Bk5—141 to 170 centimeters (55.5 to 66.9 inches); light brown (7.5YR 6/4) exterior, brown (7.5YR 5/4) exterior, moist; extremely gravelly sandy clay loam; single grain; hard, very friable; 60 percent by volume 2-?-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3727; dry when described; observed in trench. Frag less than 1 cm across. 5% voids thin coatings of CaCO3 on undersides of some pebbles.; effervescence is discontinuous
    3Bt—170 to 200 centimeters (66.9 to 78.7 inches); light reddish brown (5YR 6/4) exterior, reddish brown (5YR 5/4) exterior, moist; extremely cobbly clay; weak very fine subangular blocky structure; hard, very friable; 1 percent medium carbonate masses; 65 percent by volume 2-39-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3728; dry when described; observed in trench. No voids. 75% coarse fragments 25% less than 2 mm. 14 lb out of 51 lbs was greater than 8 cm approx. 27% by weight.; few medium soft masses of carbonate concentrations; effervescence is continuous