IDENTIFIERS

  • Current Taxon Name (Soil Name): Stronghold
  • OSD
  • Series Extent
  • User Site ID: S1991AZ003003
  • User Pedon ID: 91AZ003003
  • Vegetation Plot ID: S1991AZ003003
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - SSL
  • Lab Pedon # - 92P0271
  • NCSS Pedon Lab Data NASIS Record ID - 64510
  • 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: 31.7522221
  • Std. Longitude: -109.9838867
  • Datum: WGS84
  • Township: 19S
  • Range: 23E
  • Section: 27
  • Location Description: Tombstone, Arizona.
  • State: Arizona
  • County: AZ003—Cochise
  • MLRA: 41—Madrean Archipelago
  • Non-MLRA Soil Survey Area: AZ671—Cochise County, Arizona, Douglas-Tombstone Part
  • 7.5 Minute USGS Quad: 31109-G8—Black Diamond Peak, Arizona

    • PEDON

  • Describers Name: Lloyd Law, Jr. and Christopher C. Cochran
  • Pedon Record Orgin: Converted from PDP 3.x
  • Pedon #: 3
  • Sampled As Information:
  • Soil Name - Stronghold
  • Taxonomic Class - Coarse-loamy, mixed Ustollic Calciorthids
  • PSC - 25 to 100 cm.
  • Classificaton Date - 11/19/1991
  • Moisture Class - ustic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: hills
  • Landform: terrace
  • Geomorphic Component Hills: side slope
  • Hill Slope Profile: backslope
  • Slope Position: upper third
  • Slope Shape Across: concave
  • Slope Shape Down: convex
  • Runoff: low
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Surface Fragments: 60.00 percent
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/19/1991 (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

    AGSM

    BOCU

    EPHED

    FLCE

    LADI2

    Agropyron smithii

    Bouteloua curtipendula

    Ephedra

    Flourensia cernua

    Larrea divaricata

    —

    sideoats grama

    jointfir

    American tarwort

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

    mollic epipedon

    calcic horizon

    3—18

    18—124

    —-

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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

    11

    46

    22.9

    1445

    —

    11

    432

    —

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    17.2

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    15

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    A1—0 to 3 centimeters (0.0 to 1.2 inches); 90 percent brown (10YR 4/3) crushed, 90 percent dark brown (10YR 3/3) crushed, moist; very gravelly loamy sand; weak medium and coarse platy structure; soft, very friable, nonsticky, nonplastic; 3.0 very fine and fine roots top of horizon; 3.0 fine vesicular and tubular pores; fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; abrupt smooth boundary. Lab sample # 92P01781; dry when described;
    A2—3 to 18 centimeters (1.2 to 7.1 inches); 90 percent dark grayish brown (10YR 4/2) crushed, 90 percent very dark grayish brown (10YR 3/2) crushed, moist; very gravelly loam; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; 3.0 very fine and fine roots throughout; 3.0 fine interstitial and tubular pores; fragments; strong effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; clear smooth boundary. Lab sample # 92P01782; dry when described;
    Bk—18 to 71 centimeters (7.1 to 28.0 inches); 90 percent white (10YR 8/1) exterior, 90 percent light gray (10YR 7/2) exterior and 10 percent very pale brown (10YR 7/3), moist; gravelly loam; soft, friable, weakly cemented, slightly sticky, slightly plastic; 75.0 very fine and fine roots throughout; 3.0 very fine and fine interstitial and tubular pores; 75 percent medium and coarse irregular carbonate concretions; 31 percent by volume subangular 2-39-75 millimeter limestone-sandstone-shale fragments; violent effervescence, by hcl, 1n; moderately alkaline, pH 8.3, pH meter; clear smooth boundary. Lab sample # 92P01783; dry when described;
    Ck1—71 to 117 centimeters (28.0 to 46.1 inches); 90 percent very pale brown (10YR 7/3) exterior, 90 percent pink (7.5YR 7/4) exterior, moist; gravelly sandy loam; massive; soft, friable, slightly sticky, slightly plastic; 0.5 very fine and fine roots throughout; 3.0 fine tubular pores; fragments; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter; gradual smooth boundary. Lab sample # 92P01784; dry when described;
    Ck2—117 to 160 centimeters (46.1 to 63.0 inches); 70 percent pinkish gray (7.5YR 6/2) exterior and 20 percent pinkish gray (7.5YR 7/2) exterior and 10 percent light brown (7.5YR 6/4) exterior, 90 percent pinkish gray (7.5YR 7/2) exterior and 10 percent brown (7.5YR 4/4) exterior, moist; gravelly sandy loam; massive; hard, friable, slightly sticky, slightly plastic; 0.5 very fine and fine roots throughout; fragments; strong effervescence, by hcl, 1n; strongly alkaline, pH 8.5, pH meter. Lab sample # 92P01785; dry when described;