IDENTIFIERS

  • Current Taxon Name (Soil Name): Firstsister
  • OSD
  • Series Extent
  • User Site ID: S05CA069006
  • User Pedon ID: PINN128
  • Vegetation Plot ID: S05CA069006
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Lab Source ID - NSSL
  • Lab Pedon # - 06N0205
  • NCSS Pedon Lab Data NASIS Record ID - 18937
  • Print Date: 12/12/2024

    • 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: 36.4830556
  • Std. Longitude: -121.1723333
  • Datum: WGS84
  • Township: 17S
  • Range: 7E
  • Section: 2
  • PLSS Details: 463 feet west and 1,875 feet south of the northeast corner
  • Location Description: about 1 kilometer east of the Bear Gulch Visitor Center along the Bear Gulch Trail in Pinnacles National Monument
  • Map Unit: 131—Firstsister-Oxyaquic Haploxerolls-Rock outcrop complex, 0 to 50 percent slopes
  • Country: US—United States
  • State: California
  • County: CA069—San Benito
  • MLRA: 15—Central California Coast Range
  • Non-MLRA Soil Survey Area: CA069—San Benito County, CaliforniaCA788—Pinnacles National Monument, California
  • 7.5 Minute USGS Quad: 36121-D2—North Chalone Peak, California

    • PEDON

  • Describers Name: Oster & Bullard
  • Current Taxonomic Class: Loamy-skeletal, mixed, superactive, thermic Pachic Haploxerolls
  • Current Taxon Kind: series
  • Pedon Type: OSD pedon
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Pedon #: 128
  • Correlated Information:
  • Soil Name - Firstsister
  • Classificaton Date - 7/27/2012
  • Soil Taxonomic Edition - ninth edition
  • Moisture Class - xeric
  • Moisture Subclass - typic
  • Sampled As Information:
  • Soil Name - Firstsister
  • Classificaton Date - 6/16/2005
  • Dynamic Soil Properties:
  • Erosion Class - 0
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: colluvium derived from rhyolite
  • Landscape: hills
  • Landform: hill
  • Geomorphic Component Hills: base slope
  • Hill Slope Profile: footslope
  • Slope Position: lower third
  • Slope Complexity: simple
  • Slope Shape Across: convex
  • Slope Shape Down: concave
  • Runoff: very high
  • Drainage Class: well
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: rhyolite
  • Geology: Rhyolitic Rock formation.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 6/16/2005 (actual site observation date)
  • Air Photo ID: 12452-172
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - other grass/herbaceous cover
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Vegetation Plot Plants
    Plant Symbol Scientific Name National Vernacular Name Plant Type Group Canopy Cover % Vegetation Stata Level

    2GA

    AECA

    QUAG

    TODI

    —

    Aesculus californica

    Quercus agrifolia

    Toxicodendron diversilobum

    Grass, annual

    California buckeye

    California live oak

    Pacific poison oak

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —

    —
    Site Soil Temperature
    Site Obs. Date Depth Sensor Kind Temperature
    cm C

    6/16/2005

    50

    —

    15
    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

    40

    —

    —

    320

    —

    15

    432

    —

    250

    15

    22

    9

    16.3

    22.5

    8.9

    —

    —

    CA6926

    Pinnacles NM

    WETS
    Oi—0 to 5 centimeters (0.0 to 2.0 inches); slightly decomposed plant material; fragments; abrupt smooth boundary.; observed in pit, small
    A1—5 to 20 centimeters (2.0 to 7.9 inches); very dark grayish brown (10YR 3/2) broken face, black (10YR 2/1) broken face, moist; extremely channery loam; 40 percent sand; 45 percent silt; 15 percent clay; moderate coarse granular structure; slightly hard, very friable, nonsticky, slightly plastic; 4.0 very fine roots throughout and 1.0 very coarse roots throughout and 2.0 medium roots throughout and 2.0 fine roots throughout and 2.0 coarse roots throughout; 4.0 very fine irregular and 4.0 medium irregular and 4.0 fine irregular pores; 10 percent by volume flat subangular indurated 250-425-610 millimeter rhyolite fragments and 10 percent by volume flat subangular indurated 20-50-75 millimeter rhyolite fragments and 15 percent by volume flat subangular indurated 75-160-250 millimeter rhyolite fragments and 20 percent by volume flat subangular indurated 2-3-5 millimeter rhyolite fragments and 20 percent by volume flat subangular indurated 5-10-20 millimeter rhyolite fragments; neutral, pH 6.9, pH meter; clear wavy boundary. Lab sample # 06N00739; observed in pit, small
    A2—20 to 89 centimeters (7.9 to 35.0 inches); very dark grayish brown (10YR 3/2) broken face, black (10YR 2/1) broken face, moist; extremely channery loam; 40 percent sand; 45 percent silt; 15 percent clay; moderate medium granular, and moderate fine granular structure; slightly hard, very friable, moderately sticky, moderately plastic; 4.0 very fine roots throughout and 1.0 very coarse roots throughout and 2.0 medium roots throughout and 2.0 fine roots throughout and 2.0 coarse roots throughout; 3.0 very fine irregular and 2.0 fine irregular pores; 10 percent by volume flat subangular indurated 250-425-610 millimeter rhyolite fragments and 10 percent by volume flat subangular indurated 20-50-75 millimeter rhyolite fragments and 20 percent by volume flat subangular indurated 5-10-20 millimeter rhyolite fragments and 20 percent by volume flat subangular indurated 75-160-250 millimeter rhyolite fragments and 25 percent by volume flat subangular indurated 2-3-5 millimeter rhyolite fragments; neutral, pH 7.1, pH meter; clear wavy boundary. Lab sample # 06N00740; observed in pit, small
    Bw—89 to 150 centimeters (35.0 to 59.1 inches); brown (10YR 5/3) broken face, dark brown (10YR 3/3) broken face, moist; extremely channery coarse sandy loam; 40 percent sand; 40 percent silt; 20 percent clay; moderate medium subangular blocky, and moderate coarse subangular blocky structure; slightly hard, very friable, moderately sticky, moderately plastic; 3.0 very fine roots throughout and 2.0 medium roots throughout and 2.0 fine roots throughout and 1.0 coarse roots throughout; 5.0 very fine irregular and 2.0 medium irregular and 1.0 fine irregular pores; 10 percent by volume flat subangular indurated 20-50-75 millimeter rhyolite fragments and 10 percent by volume flat subangular indurated 250-425-610 millimeter rhyolite fragments and 20 percent by volume flat subangular indurated 75-160-250 millimeter rhyolite fragments and 20 percent by volume flat subangular indurated 5-10-20 millimeter rhyolite fragments and 25 percent by volume flat subangular indurated 2-3-5 millimeter rhyolite fragments; slightly alkaline, pH 7.5, pH meter. Lab sample # 06N00741; observed in pit, small