IDENTIFIERS

Current Taxon Name (Soil Name): Quadria

OSD

Series Extent

Local Phase: Clayey Pediment

User Site ID: S1995-TX043-023-copy

User Pedon ID: S1995-TX043-023-copy

Vegetation Plot ID: S1995-TX043-023-copy

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 98P0428

NCSS Pedon Lab Data NASIS Record ID - 10698

Print Date: 11/12/2024

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: 29.7507380

Std. Longitude: -103.7227580

Datum: WGS84

Location Description: Brewster County, Texas; from the junction of the US Highway 90 and Texas Highway 118 in Alpine; 41.1 mile south on Texas Highway 118 to gate, 4.25 miles west on ranch road, 0.8 mile south, 3.5 miles west on ranch road, 2.9 miles south on ranch road across Terlingua Creek, 1.3 miles southwest, and 100 feet north of road in rangeland. Straddlebug Mountain USGS 7.5 minute quadrangle.

Map Unit: QBE—Quadria, Beewon and Musgrave soils, 0 to 30 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-F6—Long Hills, Texas

PEDON

Describers Name: Lynn Loomis, Jerry Rives, and Alan Terrell

Current Taxonomic Class: Fine, mixed, superactive, thermic Ustic Natrargids

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: laboratory sampling site

Pedon Record Orgin: Converted from PDP 3.x

Pedon #: 23

Correlated Information:

Soil Name - Quadria (flagged as OSD)

PSC - 13 to 63 cm.

Classificaton Date - 4/5/2016

Classifier - Chance M. Robinson

Soil Taxonomic Edition - twelfth edition

Moisture Class - aridic (torric)

Moisture Subclass - ustic

Sampled As Information:

Soil Name - Quadria

Taxonomic Class - Fine, mixed, superactive, thermic Ustic Natrargids

Taxon Kind - series

Classificaton Date - 3/3/1995

Moisture SUBClass - ustic

Dynamic Soil Properties:

Pedoderm Loose Cover Indicator - no

Hydric: no

Certification Status: certified

QC Status: level 1

SITE

Parent Material: clayey alluvium derived from tuff over gravelly alluvium derived from tuff over loamy alluvium derived from tuff over gravelly alluvium derived from tuff

Landform: pediment

Slope Shape Across: convex

Slope Shape Down: linear

Runoff: medium

Drainage Class: well

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 3/3/1995 (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

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
ATCA2 BOCU BOER4 BOGR2 FLCE LATR2 MUPO2 PLMU3 PRGLT SCBR2 SEVU2	Atriplex canescens Bouteloua curtipendula Bouteloua eriopoda Bouteloua gracilis Flourensia cernua Larrea tridentata Muhlenbergia porteri Pleuraphis mutica Prosopis glandulosa var. torreyana Scleropogon brevifolius Setaria vulpiseta	fourwing saltbush sideoats grama black grama blue grama American tarwort creosote bush bush muhly tobosagrass western honey mesquite burrograss plains bristlegrass	— — — — — — — — — — —	— — — — — — — — — — —	— — — — — — — — — — —

Pedon Restrictions
Kind	Hardness	Restriction Depth L-H	Restriction Thickness L-RV-H
		cm
abrupt textural change natric	noncoherent noncoherent	13 - 13 13 - 117	— —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon argillic horizon natric horizon abrupt textural change calcic horizon	0—13 13—117 13—117 13—13 43—117	—- —- —- —- —-

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
0.3	—	—	1096.6	—	180	321	643	—	18.5	—	—	—	—	—	—	—	PRISM	—	—

A—0 to 13 centimeters (0.0 to 5.1 inches); brown (7.5YR 5/3), dark brown (7.5YR 3/3), moist; loam; moderate fine and medium subangular blocky structure; slightly hard, friable; moderate excavation difficulty; 3.0 very fine roots and 3.0 medium roots and 3.0 fine roots and 3.0 coarse roots; 3.0 very fine and fine tubular pores; 5 percent by volume nonflat subangular indurated 2-40-75 millimeter ignimbrite fragments; clay loam of Field texture class; slight effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 98P02474; observed in trench. 1 percent calcium carbonate equivalent; 1.3 ds/m electrical conductivity; slightly alkaline; 2 to 6 inches thick. The A horizon has color with hues of 5YR to 10YR, value of 5 or 6, and chroma of 3 or 4. Texture of the fine earth is loam, silty clay loam, or clay loam with a clay content in the particle-size control section ranges from 35 to 55 percent, and ignimbrite rock fragments range from 0 to 15 percent by volume.

Btn1—13 to 28 centimeters (5.1 to 11.0 inches); reddish brown (5YR 5/3), reddish brown (5YR 4/3), moist; clay; moderate coarse prismatic parts to moderate medium and coarse subangular blocky parts to moderate fine and medium subangular blocky structure; very hard, very firm; very high excavation difficulty; 3.0 very fine roots and 3.0 medium roots and 3.0 fine roots and 3.0 coarse roots; 3.0 very fine tubular and 3.0 medium tubular and 3.0 fine tubular and 3.0 coarse tubular pores; 75 percent distinct reddish brown (5YR 5/3) clay films on faces of peds; fragments; clay of Field texture class; strong effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 98P02475; observed in trench. 10 percent calcium carbonate equivalent; 1.0 ds/m electrical conductivity; moderately alkaline; 5 to 10 inches thick. The Bt horizon has color with hues of 5YR or 7.5YR, value of 3 to 5, and chroma of 3 to 6. Texture of the fine earth is clay with a silicate clay content of 35 to 55 percent. Ignimbrite rock fragments range from 0 to 20 percent by volume. Calcium carbonate equivalent is less than 15 percent. Salinity is less than 2 ds/m. Gypsum crystals are present in some pedons in the lower part. Also sampled as 97P0366.; continuous - phpvsfiid 1046781; continuous - phpvsfiid 1046781

Btn2—28 to 43 centimeters (11.0 to 16.9 inches); reddish brown (5YR 5/3), reddish brown (5YR 4/3), moist; clay; moderate coarse prismatic parts to moderate medium and coarse subangular blocky parts to moderate fine and medium subangular blocky structure; very hard, very firm; very high excavation difficulty; 3.0 very fine roots and 3.0 medium roots and 3.0 fine roots and 3.0 coarse roots; 3.0 very fine and fine tubular pores; 75 percent distinct reddish brown (5YR 5/3) clay films on faces of peds; 2 percent by volume nonflat subangular indurated 2-40-75 millimeter ignimbrite fragments; clay of Field texture class; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 98P02476; observed in trench. 14 percent calcium carbonate equivalent; 1.4 ds/m electrical conductivity; moderately alkaline; 0 to 11 inches thick. Elevation ranges from 3000 to 4500 feet. The Bt horizon has color with hues of 5YR to 10YR, value of 5 or 6, and chroma of 3 or 4. Texture of the fine earth is loam, silty clay loam, or clay loam with a clay content of 25 to 35 percent. Ignimbrite rock fragments range from 0 to 20 percent by volume. 2 percent subangular ignimbrite gravel.; discontinuous - phpvsfiid 1046782; discontinuous - phpvsfiid 1046782

2Btkn1—43 to 61 centimeters (16.9 to 24.0 inches); light reddish brown (5YR 6/4), reddish brown (5YR 5/4), moist; gravelly clay loam; weak medium and coarse subangular blocky parts to weak fine and medium subangular blocky structure; very hard, very firm; very high excavation difficulty; 3.0 very fine and fine roots; 0.5 very fine and fine tubular pores; 1 percent distinct white (10YR 8/1) carbonate coats on faces of peds and 30 percent distinct white (10YR 8/1) carbonate coats on rock fragments; 20 percent by volume nonflat rounded indurated 2-40-75 millimeter ignimbrite fragments; gravelly sandy clay of Field texture class; violent effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 98P02477; observed in trench. 20 percent rounded ignimbrite gravel; 24 percent calcium carbonate equivalent; 4.0 ds/m electrical conductivity; moderately alkaline; 6 to 10 inches thick. The Btk horizon has color with hues of 5YR or 7.5YR, value of 4 to 7, and chroma of 4 to 6. Texture of the fine earth is sandy clay loam, clay loam, or clay with a silicate clay content of 20 to 40 percent. Ignimbrite rock fragments range from 0 to 30 percent by volume. Calcium carbonate equivalent ranges from 15 to 30 percent. Electrical conductivity ranges from 4 to 12 ds/m. Gypsum crystals are present in some pedons. Also sampled as 97P0367.; discontinuous - phpvsfiid 1046783; discontinuous - phpvsfiid 1046784; discontinuous - phpvsfiid 1046783; discontinuous - phpvsfiid 1046784

2Btkn2—61 to 79 centimeters (24.0 to 31.1 inches); light reddish brown (5YR 6/4), reddish brown (5YR 5/4), moist; gravelly loam; weak medium and coarse subangular blocky parts to weak fine and medium subangular blocky structure; hard, firm; very high excavation difficulty; 3.0 very fine and fine roots; 0.5 very fine and fine tubular pores; 1 percent distinct white (10YR 8/1) carbonate coats on faces of peds and 10 percent distinct white (10YR 8/1) carbonate coats on lower surfaces of peds or rocks; 3 percent medium and coarse irregular noncoherent cemented white (10YR 8/1) carbonate masses; 5 percent by volume nonflat subrounded indurated 75-162-250 millimeter ignimbrite fragments and 25 percent by volume nonflat rounded indurated 2-40-75 millimeter ignimbrite fragments; gravelly sandy clay of Field texture class; violent effervescence, by hcl, 1n; gradual smooth boundary. Lab sample # 98P02478; observed in trench. 30 percent rounded ignimbrite gravel and 10 percent subrounded ignimbrite cobbles; 30 percent calcium carbonate equivalent; 10.1 ds/m electrical conductivity; moderately alkaline; 0 to 14 inches thick. The Btk horizon has color with hue of 5YR or 7.5YR, value of 4 to 7, and chroma of 4 to 6. Texture of the fine earth is sandy clay loam, clay loam, or clay with a silicate clay content of 20 to 40 percent. Ignimbrite rock fragments range from 0 to 30 percent by volume. Calcium carbonate equivalent ranges from 15 to 30 percent. Electrical conductivity ranges from 4 to 12 ds/m. Gypsum crystals are present in some pedons.; discontinuous - phpvsfiid 1046785; discontinuous - phpvsfiid 1046786; discontinuous - phpvsfiid 1046785; discontinuous - phpvsfiid 1046786

2Btkn3—79 to 117 centimeters (31.1 to 46.1 inches); light reddish brown (5YR 6/4), reddish brown (5YR 5/4), moist; gravelly sandy clay loam; weak medium and coarse subangular blocky parts to weak fine and medium subangular blocky structure; slightly hard, firm; very high excavation difficulty; 0.5 very fine and fine roots; 0.5 very fine and fine tubular pores; 1 percent distinct white (10YR 8/1) carbonate coats on faces of peds and 10 percent distinct white (10YR 8/1) carbonate coats on rock fragments; 3 percent medium and coarse irregular noncoherent cemented white (10YR 8/1) carbonate masses; 5 percent by volume nonflat subrounded indurated 75-162-250 millimeter ignimbrite fragments and 25 percent by volume nonflat rounded indurated 2-40-75 millimeter ignimbrite fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 98P02479; observed in trench. 30 percent rounded ignimbrite gravel and 5 percent subrounded ignimbrite cobbles; 16 percent calcium carbonate equivalent; 12.0 ds/m electrical conductivity; moderately alkaline; 0 to 15 inches thick. The Btk horizon has color with hue of 5YR or 7.5YR, value of 4 to 7, and chroma of 4 to 6. Texture of the fine earth is sandy clay loam, clay loam, or clay with a silicate clay content of 20 to 40 percent. Ignibrite rock fragments range from 15 to 30 percent by volume. Calcium carbonate equivalent ranges from 15 to 30 percent. Electrical conductivity ranges from 4 to 12 ds/m. Gypsum crystals are present in some pedons.; discontinuous - phpvsfiid 1046787; discontinuous - phpvsfiid 1046788; discontinuous - phpvsfiid 1046787; discontinuous - phpvsfiid 1046788

3Bkn—117 to 145 centimeters (46.1 to 57.1 inches); light reddish brown (5YR 6/3), reddish brown (5YR 5/3), moist; fine sandy loam; weak fine and medium subangular blocky structure; slightly hard, friable; moderate excavation difficulty; 0.5 very fine and fine roots throughout; 0.5 very fine and fine tubular pores; 3 percent medium and coarse irregular noncoherent cemented white (10YR 8/1) carbonate masses; 5 percent by volume nonflat rounded indurated 2-40-75 millimeter ignimbrite fragments; sandy loam of Field texture class; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 98P02480; observed in trench. 5 percent rounded ignimbrite gravel; 9 percent calcium carbonate equivalent; 10.6 ds/m electrical conductivity; moderately alkaline; 0 to 11 inches thick. The Bk or BCk horizon, where present, has color with hue of 5YR or 7.5YR, value of 5 or 6, and chroma of 3 or 4. These horizons are beneath lithological discontinuities located more than 40 inches below the soil surface. Texture of the fine earth fraction is coarse sandy loam, sandy loam, or fine sandy loam. Ignimbrite rock fragments range from 5 to 30 percent by volume. Calcium carbonate equivalent is less than 10 percent. Electrical conductivity ranges from 6 to 12 ds/m.

4BCkn—145 to 200 centimeters (57.1 to 78.7 inches); reddish brown (5YR 5/3), reddish brown (5YR 4/3), moist; gravelly loamy coarse sand; weak fine and medium subangular blocky structure; soft, friable; very high excavation difficulty; 0.5 very fine and fine roots; 0.5 very fine and fine tubular pores; 1 percent distinct white (10YR 8/1) carbonate coats on faces of peds and 10 percent distinct white (10YR 8/1) carbonate coats on rock fragments; 3 percent coarse irregular noncoherent cemented white (10YR 8/1) carbonate masses and 1 percent medium irregular noncoherent cemented white (10YR 8/1) carbonate masses; 10 percent by volume nonflat subrounded indurated 75-162-250 millimeter ignimbrite fragments and 20 percent by volume nonflat rounded indurated 2-40-75 millimeter ignimbrite fragments; sandy loam of Field texture class; noneffervescent, by hcl, 1n. Lab sample # 98P02481; observed in trench. Alternating strata of coarse sand and very gravelly coarse sand 6 inches thick; 20 percent rounded ignimbrite gravel and 10 percent subrounded ignimbrite cobbles; 1 percent calcium carbonate equivalent; 7.4 ds/m electrical conductivity; slightly alkaline. The Bk or BCk horizon, where present, has color with hue of 5YR or 7.5YR, value of 5 or 6, and chroma of 3 or 4. These horizons are beneath lithologic discontinuities located more than 40 inches below the soil surface. Texture of the fine earth fraction is coarse sandy loam, sandy loam, or fine sandy loam. Ignimbrite rock fragments range from 5 to 30% by volume. Calcium carbonate equivalent is less that 10%. Electrical cond. ranges 6-12 ds/m; discontinuous - phpvsfiid 1046789; discontinuous - phpvsfiid 1046790; discontinuous - phpvsfiid 1046789; discontinuous - phpvsfiid 1046790