IDENTIFIERS

  • Current Taxon Name (Soil Name): Corazones
  • OSD
  • Series Extent
  • User Site ID: S1991-TX043-008-copy
  • User Pedon ID: S1991-TX043-008-copy
  • Vegetation Plot ID: S1991-TX043-008-copy
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - SSL
  • Lab Pedon # - 91P0463
  • NCSS Pedon Lab Data NASIS Record ID - 63506
  • Print Date: 11/21/2024

    • 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: 29.3563881
  • Std. Longitude: -103.5155563
  • Datum: WGS84
  • Location Description: from gate 2 of Terlingua ranch, north of Study Butte; 0.9 miles east 100 feet south of road at bend
  • 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: TX622—Brewster County, Texas (Main Part)
  • 7.5 Minute USGS Quad: 29103-C5—Terlingua, Texas

    • PEDON

  • Describers Name: Rex Cochran and Stan Albee
  • Current Taxonomic Class: Loamy-skeletal, mixed, superactive, hyperthermic Typic Haplocalcids
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: Converted from SSL-CMS data
  • Pedon #: 8
  • 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

  • Parent Material: gravelly alluvium derived from syenite
  • Landform: alluvial fan
  • Slope Position: middle third
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: well
  • Surface Fragments: 70.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 2/1/1991 (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

    ARPUW

    CROTO

    DAPU7

    FOSP2

    LATR2

    OPLE

    Aristida purpurea var. wrightii

    Croton

    Dasyochloa pulchella

    Fouquieria splendens

    Larrea tridentata

    Opuntia leptocaulis

    Wright's threeawn

    croton

    low woollygrass

    ocotillo

    creosote bush

    Christmas cactus

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

    ochric epipedon

    cambic horizon

    calcic horizon

    0—5

    5—20

    20—178

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    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

    —

    —

    808

    —

    180

    272

    855

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    20.8

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    PRISM

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    A—0 to 5 centimeters (0.0 to 2.0 inches); pale brown (10YR 6/3), brown (10YR 4/3), moist; very gravelly sandy loam; weak fine subangular blocky structure; slightly hard, very friable, nonsticky, nonplastic; 2.5 very fine and fine roots throughout; 5 percent by volume 75-162-250 millimeter limestone, unspecified fragments and 40 percent by volume 2-39-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 91P02648; observed in trench. common very fine and fine roots throughout; effervescence is continuous
    Bw—5 to 20 centimeters (2.0 to 7.9 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; very gravelly loam; weak medium granular structure; slightly hard, very friable, nonsticky, nonplastic; 2.5 very fine and fine roots throughout and 0.5 medium and coarse roots throughout; 5 percent by volume 75-162-250 millimeter igneous, unspecified fragments and 50 percent by volume 2-39-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 91P02649; observed in trench. few medium and coarse roots throughout; common very fine and fine roots throughout; effervescence is continuous
    Bk1—20 to 41 centimeters (7.9 to 16.1 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; very gravelly loam; weak medium granular structure; slightly hard, friable, nonsticky, slightly plastic; 55 percent prominent carbonate coats on rock fragments; 5 percent by volume 75-162-250 millimeter igneous, unspecified fragments and 50 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 91P02650; observed in trench. many lime or carbonate coats surface features on rock fragments; effervescence is continuous; continuous - phpvsfiid 1209932; continuous - phpvsfiid 1209932
    Bk2—41 to 66 centimeters (16.1 to 26.0 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; extremely gravelly loam; weak medium granular structure; slightly hard, friable, nonsticky, nonplastic; 2.5 very fine and fine roots throughout; 55 percent prominent carbonate coats on rock fragments; 5 percent by volume 75-162-250 millimeter igneous, unspecified fragments and 10 percent by volume 2-39-75 millimeter limestone, unspecified fragments and 40 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; gradual wavy boundary. Lab sample # 91P02651; observed in trench. many lime or carbonate coats surface features on rock fragments; common very fine and fine roots throughout; effervescence is continuous; continuous - phpvsfiid 1209933; continuous - phpvsfiid 1209933
    Bk3—66 to 91 centimeters (26.0 to 35.8 inches); yellowish brown (10YR 5/4), dark yellowish brown (10YR 4/4), moist; extremely gravelly sandy loam; weak medium granular structure; slightly hard, friable, nonsticky, nonplastic; 0.5 very fine and fine roots throughout; 37 percent distinct carbonate coats on rock fragments; 2 percent by volume 75-162-250 millimeter limestone, unspecified fragments and 5 percent by volume 75-162-250 millimeter igneous, unspecified fragments and 50 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; gradual wavy boundary. Lab sample # 91P02652; observed in trench. common lime or carbonate coats surface features on rock fragments; few very fine and fine roots throughout; effervescence is continuous; continuous - phpvsfiid 1209934; continuous - phpvsfiid 1209934
    Bk4—91 to 122 centimeters (35.8 to 48.0 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; extremely gravelly sandy loam; weak medium granular structure; slightly hard, friable, nonsticky, nonplastic; 0.5 very fine and fine roots throughout; 37 percent distinct carbonate coats on rock fragments; 2 percent by volume 75-162-250 millimeter limestone, unspecified fragments and 5 percent by volume 75-162-250 millimeter igneous, unspecified fragments and 65 percent by volume 2-39-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; gradual wavy boundary. Lab sample # 91P02653; observed in trench. common lime or carbonate coats surface features on rock fragments; few very fine and fine roots throughout; effervescence is continuous; patchy - phpvsfiid 1209935; patchy - phpvsfiid 1209935
    Bk5—122 to 178 centimeters (48.0 to 70.1 inches); light yellowish brown (10YR 6/4), yellowish brown (10YR 5/4), moist; extremely gravelly loamy sand; weak medium granular structure; slightly hard, friable, nonsticky, nonplastic; 15 percent faint carbonate coats on rock fragments; 1 percent fine and medium cylindrical gypsum crystals, unspecified; 5 percent by volume 75-162-250 millimeter limestone, unspecified fragments and 10 percent by volume 75-162-250 millimeter igneous, unspecified fragments and 60 percent by volume 2-39-75 millimeter igneous, unspecified fragments; strong effervescence, by hcl, 1n. Lab sample # 91P02654; observed in trench. few fine and medium gypsum crystals concentrations; few lime or carbonate coats surface features on rock fragments; effervescence is continuous; patchy - phpvsfiid 1209936; patchy - phpvsfiid 1209936