IDENTIFIERS

Current Taxon Name (Soil Name): Horseshoe

OSD

Series Extent

User Site ID: S2007CA630SMM042

User Pedon ID: S07CA009003

Vegetation Plot ID: S2007CA630SMM042

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - SSL

Lab Pedon # - 08N0157

NCSS Pedon Lab Data NASIS Record ID - 19676

Print Date: 6/2/2024

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: 38.4352493

Std. Longitude: -120.4549408

Datum: WGS84

Township: 7 N

Range: 14 E

Section: 29

PLSS Details: about 855 feet east and 1495 feet north of the southwest corner section

Location Description: about 4.6 miles northeast of the community of West Point, California

Map Unit: 6041—Mantree ashy sandy loam, 3 to 15 percent slopes

Country: US—United States

State: California

County: CA009—Calaveras

MLRA: 22A—Sierra Nevada and Tehachapi Mountains

Non-MLRA Soil Survey Area: CA630—Central Sierra Foothills Area, California, Parts of Calaveras and Tuolumne Counties

7.5 Minute USGS Quad: 38120-D4—Devils Nose, California

PEDON

Describers Name: Sue Malone

Current Taxonomic Class: Fine-loamy, mixed, semiactive, mesic Xeric Haplohumults

Current Taxon Kind: taxadjunct

Pedon Type: representative pedon for component

Pedon Purpose: laboratory sampling site

Pedon Record Orgin: NASIS

Correlated Information:

Soil Name - Horseshoe

PSC - 38 to 88 cm.

Classificaton Date - 7/3/2018

Classifier - Andrew Brown

Soil Taxonomic Edition - twelfth edition

Moisture Class - xeric

Moisture Subclass - typic

Sampled As Information:

Soil Name - Mantree

Classificaton Date - 10/19/2007

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: volcanic ash over acid igneous colluvium derived from granitoid and/or acid igneous residuum weathered from granitoid

Landscape: mountains

Landform: broad mountain ridge

Geomorphic Component Mountains: mountaintop

Hill Slope Profile: backslope

Slope Complexity: simple

Slope Shape Across: linear

Slope Shape Down: linear

Drainage Class: well

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 10/19/2007 (actual site observation date)

Plant Association Name: Sierran Mixed Conifer

Surface Cover Properties:

Site Obs. Cover Kind 1 - tree cover

Site Obs. Cover Kind 2 - intermixed conifers and hardwoods

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Current Weather - rain

Current Air Temp - 11

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
ABCO ADBI ARCTO3 CADE27 CAREX CHFO PILA PIPO PSME QUKE	Abies concolor Adenocaulon bicolor Arctostaphylos Calocedrus decurrens Carex Chamaebatia foliolosa Pinus lambertiana Pinus ponderosa Pseudotsuga menziesii Quercus kelloggii	white fir American trailplant manzanita incense cedar sedge mountain misery sugar pine ponderosa pine Douglas-fir California black oak	— — — — — — — — — —	— — — — — — — — — —	— — — — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon cambic horizon argillic horizon lithologic discontinuity	0—18 15—38 38—201 38—	—18— —23— —163— —-

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
10/19/2007	50	—	10

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
6	—	—	1170	—	316	1270	—	—	—	—	—	—	—	—	—	—	—	—	—

Oi—0 to 5 centimeters (0.0 to 2.0 inches); slightly decomposed plant material; fragments; abrupt smooth boundary.

Oe—5 to 8 centimeters (2.0 to 3.1 inches); moderately decomposed plant material; fragments; abrupt smooth boundary.

A—8 to 15 centimeters (3.1 to 5.9 inches); very dark brown (10YR 2/2) crushed, dark grayish brown (10YR 4/2) broken face, dry; medial loam; 47 percent sand; 38 percent silt; 15 percent clay; weak fine granular structure; soft, very friable, nonsticky, slightly plastic; slightly fluid; 8.0 very fine roots throughout and 8.0 medium roots throughout and 8.0 fine roots throughout and 8.0 coarse roots throughout; 8.0 very fine interstitial and 8.0 fine interstitial pores; 2 percent by volume subrounded indurated 2-?-5 millimeter tuff breccia fragments; moderately acid, pH 6.0, hellige-truog; clear wavy boundary.; dry when described; observed in trench

Bw1—15 to 25 centimeters (5.9 to 9.8 inches); dark brown (7.5YR 3/3) crushed, yellowish brown (10YR 5/4) broken face, dry; loam; 50 percent sand; 38 percent silt; 14 percent clay; weak fine subangular blocky structure; soft, very friable, nonsticky, slightly plastic; slightly fluid; 8.0 very fine roots throughout and 8.0 medium roots throughout and 8.0 fine roots throughout and 8.0 coarse roots throughout; 8.0 very fine interstitial and 8.0 fine interstitial pores; 1 percent by volume subrounded indurated 6-?-75 millimeter tuff breccia fragments and 2 percent by volume subrounded indurated 2-?-5 millimeter tuff breccia fragments; slightly acid, pH 6.1, hellige-truog; gradual wavy boundary.; dry when described; observed in trench

Bw2—25 to 38 centimeters (9.8 to 15.0 inches); brown (7.5YR 4/3) crushed, light yellowish brown (10YR 6/4) broken face, dry; loam; 18 percent sand; 36 percent silt; 16 percent clay; weak medium subangular blocky, and weak fine subangular blocky structure; soft, very friable, nonsticky, slightly plastic; slightly fluid; 8.0 very fine roots throughout and 8.0 medium roots throughout and 8.0 fine roots throughout and 8.0 coarse roots throughout; 8.0 very fine interstitial and 8.0 fine interstitial pores; 1 percent by volume subrounded indurated 6-?-75 millimeter tuff breccia fragments and 5 percent by volume subrounded indurated 2-?-5 millimeter tuff breccia fragments; moderately acid, pH 6.0, hellige-truog; clear irregular boundary.; dry when described; observed in trench

2BEt—38 to 61 centimeters (15.0 to 24.0 inches); strong brown (7.5YR 4/6) crushed, 60 percent reddish yellow (7.5YR 7/6) broken face and 40 percent strong brown (7.5YR 5/6) broken face, dry; loam; 44 percent sand; 35 percent silt; 21 percent clay; moderate coarse subangular blocky, and moderate medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; 3.0 very fine roots throughout and 0.8 medium roots throughout and 3.0 fine roots throughout and 3.0 coarse roots throughout; 3.0 very fine irregular and 0.8 very fine tubular pores; 10 percent distinct yellowish red (5YR 5/6), dry, clay films on surfaces along pores and 10 percent distinct yellowish red (5YR 5/6), dry, clay films on all faces of peds and 20 percent prominent pink (7.5YR 7/3), dry, silt coats on all faces of peds; 1 percent by volume very strongly coherent cemented 2-?-5 millimeter mixed fragments; moderately acid, pH 6.0, hellige-truog; abrupt wavy boundary.; dry when described; observed in trench

2Bt1—61 to 112 centimeters (24.0 to 44.1 inches); strong brown (7.5YR 4/6) crushed, 50 percent strong brown (7.5YR 5/6) broken face and 50 percent yellow (10YR 7/6) broken face, dry; clay loam; 37 percent sand; 31 percent silt; 32 percent clay; strong coarse angular blocky parts to strong medium subangular blocky structure; extremely hard, slightly rigid, moderately sticky, moderately plastic; 3.0 very fine roots throughout and 0.8 medium roots throughout and 3.0 fine roots throughout and 0.8 coarse roots throughout; 0.8 very fine tubular and 0.8 very fine irregular pores; 40 percent prominent yellowish red (5YR 4/6), moist, clay films on surfaces along pores and 40 percent prominent yellowish red (5YR 4/6), moist, clay films on all faces of peds; 1 percent by volume moderately coherent cemented 2-?-5 millimeter granite fragments and 1 percent by volume very strongly coherent cemented 2-?-5 millimeter granite fragments; moderately acid, pH 6.0, hellige-truog; gradual wavy boundary.; slightly moist when described; observed in trench

2Bt2—112 to 158 centimeters (44.1 to 62.2 inches); strong brown (7.5YR 4/6) crushed, 50 percent reddish yellow (7.5YR 6/6) broken face and 50 percent strong brown (7.5YR 5/6) broken face, dry; loam; 43 percent sand; 33 percent silt; 24 percent clay; strong coarse angular blocky parts to strong medium subangular blocky structure; extremely hard, slightly rigid, moderately sticky, moderately plastic; 0.8 very fine roots throughout and 0.8 fine roots throughout and 0.1 coarse roots throughout; 0.8 very fine irregular and 0.8 very fine tubular and 0.8 fine tubular and 0.8 fine irregular pores; 30 percent distinct yellowish red (5YR 4/6), moist, clay films on surfaces along pores and 30 percent distinct yellowish red (5YR 4/6), moist, clay films on all faces of peds; 1 percent by volume very strongly coherent cemented 2-?-5 millimeter granite fragments and 1 percent by volume moderately coherent cemented 2-?-5 millimeter granite fragments; moderately acid, pH 5.9, hellige-truog; clear wavy boundary.; slightly moist when described; observed in trench

2BCt—158 to 201 centimeters (62.2 to 79.1 inches); 50 percent yellowish red (5YR 5/6) broken face and 50 percent brown (7.5YR 5/4) broken face and strong brown (7.5YR 5/6) crushed, 60 percent reddish yellow (7.5YR 6/6) broken face and 40 percent strong brown (7.5YR 5/6) broken face, dry; loam; 43 percent sand; 38 percent silt; 19 percent clay; moderate coarse angular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; 0.8 very fine roots throughout and 0.8 fine roots throughout and 0.1 coarse roots throughout; 3.0 very fine irregular and 3.0 fine irregular pores; 40 percent prominent yellowish red (5YR 4/6), moist, clay films on all faces of peds; 1 percent by volume very strongly coherent cemented 2-?-5 millimeter granite fragments and 1 percent by volume moderately coherent cemented 2-?-5 millimeter granite fragments; strongly acid, pH 5.4, hellige-truog; abrupt wavy boundary.; slightly moist when described; observed in trench

2C—201 to 226 centimeters (79.1 to 89.0 inches); brownish yellow (10YR 6/6) crushed sandy loam; 53 percent sand; 37 percent silt; 10 percent clay; massive; hard, friable, slightly sticky, nonplastic; 0.8 very fine roots throughout and 0.8 fine roots throughout and 0.1 coarse roots throughout; 8.0 fine interstitial pores; 5 percent by volume moderately coherent cemented 2-?-5 millimeter granite fragments; strongly acid, pH 5.5, hellige-truog.; slightly moist when described; observed in trench