IDENTIFIERS
Current Taxon Name (Soil Name):
Contra Costa
OSD
Series Extent
User Site ID:
S1980-CA-05-082x
User Pedon ID:
80-CA-05-082x
Lab Information:
Certified Lab Pedon Description -
no
Lab Source ID -
UCDAVIS
Lab Pedon # -
UCD8005082
NCSS Pedon Lab Data NASIS Record ID -
42367
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:
37.9861990
Std. Longitude:
-120.8068810
Datum:
WGS84
Township:
2N
Range:
11E
Section:
31
PLSS Details:
NE/4, NW/4
Map Unit:
7085—Bonanza-Loafercreek complex, 3 to 15 percent slopes
State:
California
County:
CA009—Calaveras
MLRA:
18—Sierra Nevada Foothills
Non-MLRA Soil Survey Area:
CA630—Central Sierra Foothills Area, California, Parts of Calaveras and Tuolumne Counties
7.5 Minute USGS Quad:
37120-H7—Bachelor Valley, California
PEDON
Describers Name:
COS
Current Taxonomic Class:
Fine, mixed, superactive, thermic Mollic Palexeralfs
Current Taxon Kind:
taxadjunct
Pedon Type:
taxadjunct to the series
Pedon Purpose:
laboratory sampling site
Pedon Record Orgin:
NASIS
Correlated Information:
Soil Name -
Contra Costa
PSC -
28 to 78 cm.
Classificaton Date -
1/22/2016
Classifier -
Andrew Paolucci
Soil Taxonomic Edition -
twelfth edition
Moisture Class -
xeric
Moisture Subclass -
typic
Sampled As Information:
Soil Name -
CONTRA COSTA
Taxonomic Class -
Fine, mixed, thermic Mollic Haploxeralfs
Classificaton Date -
3/2/2009
Dynamic Soil Properties:
Erosion Class -
0
Pedoderm Loose Cover Indicator -
no
Hydric:
no
SITE
Parent Material:
RES
Slope Complexity:
simple
Drainage Class:
well
Bedrock:
sandstone, unspecified
Geology:
Sandstone. Geologic Formation: formation.
Surface Fragments:
Benchmark Soil?:
no
VEGETATION
SITE OBSERVATION
Observation Date:
3/2/2009 (entry creation 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
Pedon Diagnostic Features
Feature Kind
Feature Depth L-H
Feature Thickness L-RV-H
cm
ochric epipedon
argillic horizon
paralithic contact
0—28
28—107
107—132
—-
—-
—-
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
12
—
—
111
—
45
432
—
—
18.3
—
—
—
—
—
—
—
—
—
—
A—0 to 18 centimeters (0.0 to 7.1 inches); brown (7.5YR 5/4), dark reddish brown (5YR 3/3), moist; loam; 48 percent sand; 35 percent silt; 17 percent clay; moderate coarse angular blocky structure; very hard, firm, slightly sticky, slightly plastic; 21.0 very fine roots throughout and 21.0 roots throughout; 21.0 very fine tubular and 21.0 irregular pores; fragments; moderately acid, pH 5.6; abrupt smooth boundary. Lab sample # UCD04033
AB—18 to 28 centimeters (7.1 to 11.0 inches); brown (7.5YR 5/4), dark reddish brown (5YR 3/3), moist; loam; 45 percent sand; 35 percent silt; 21 percent clay; massive; very hard, firm, slightly sticky, slightly plastic; 3.0 very fine roots and 3.0 roots; 21.0 very fine tubular and 21.0 very fine irregular and 21.0 irregular and 21.0 tubular pores; fragments; strongly acid, pH 5.5; clear smooth boundary. Lab sample # UCD04034
Bt1—28 to 38 centimeters (11.0 to 15.0 inches); brown (7.5YR 5/4), brown (7.5YR 4/4), moist; clay; 28 percent sand; 26 percent silt; 46 percent clay; strong very coarse angular blocky parts to moderate very coarse angular blocky structure; extremely hard, extremely firm, moderately sticky, moderately plastic; 0.5 very fine roots throughout and 0.5 roots throughout; 21.0 very fine tubular and 21.0 very fine irregular and 21.0 irregular and 21.0 tubular pores; 75 percent clay films on top faces of peds and 75 percent clay films on surfaces along pores; fragments; strongly acid, pH 5.4; clear wavy boundary. Lab sample # UCD04035
Bt2—38 to 69 centimeters (15.0 to 27.2 inches); brown (7.5YR 5/4), reddish brown (5YR 4/4), moist; clay; 29 percent sand; 27 percent silt; 44 percent clay; strong very coarse angular blocky parts to moderate very coarse angular blocky structure; extremely hard, extremely firm, moderately sticky, moderately plastic; 0.1 very fine roots throughout; 0.5 pores; 75 percent clay films; fragments; moderately acid, pH 5.8; gradual wavy boundary. Lab sample # UCD04036
Bt3—69 to 86 centimeters (27.2 to 33.9 inches); brown (7.5YR 5/4), brown (7.5YR 5/4), moist; sandy clay loam; 45 percent sand; 23 percent silt; 32 percent clay; massive; extremely hard, extremely firm, moderately sticky, moderately plastic; 0.1 very fine roots throughout; 0.5 pores; fragments; neutral, pH 6.8; gradual wavy boundary. Lab sample # UCD04037
BCt—86 to 107 centimeters (33.9 to 42.1 inches); reddish yellow (5YR 6/6), brown (7.5YR 5/4), moist; sandy clay loam; 56 percent sand; 18 percent silt; 26 percent clay; massive; slightly hard, friable, nonsticky, slightly plastic; 0.1 very fine roots throughout and 0.1 roots throughout; 3.0 very fine vesicular and 3.0 very fine irregular and 3.0 irregular and 3.0 vesicular pores; 1 percent clay films between sand grains; fragments; neutral, pH 7.1; abrupt wavy boundary. Lab sample # UCD04038
Cr—107 to 132 centimeters (42.1 to 52.0 inches); sand; fragments. Lab sample # UCD04039