IDENTIFIERS

Current Taxon Name (Soil Name): Mixpie

OSD

Series Extent

User Site ID: S1986-TX043-004

User Pedon ID: S1986-TX043-004-copy

Vegetation Plot ID: S1986-TX043-004

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - SSL

Lab Pedon # - 86P0641

NCSS Pedon Lab Data NASIS Record ID - 58935

Print Date: 11/24/2024

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: 29.2727083

Std. Longitude: -103.1572278

Datum: WGS84

Location Description: Brewster County, TX: From NPS Panther junction HQ, 8 km SE on Rio Grande Village Rd, 45 meters S on Service Rd, 12 meters W.

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: TX621—Big Bend National Park, Texas

7.5 Minute USGS Quad: 29103-C2—Panther Junction, Texas

PEDON

Describers Name: Jack Williams, Rusty Dowell, Rex Cochran, and Jerry Rives

Current Taxonomic Class: Loamy-skeletal, mixed, superactive, thermic, shallow Ustic Petrocalcids

Current Taxon Kind: series

Pedon Purpose: full pedon description

Pedon Record Orgin: Converted from SSL-CMS data

Pedon #: 4

Correlated Information:

Soil Name - Mixpie

PSC - 0 to 16 cm.

Classificaton Date - 8/7/2015

Classifier - Lynn Loomis

Soil Taxonomic Edition - twelfth edition

Moisture Class - aridic (torric)

Moisture Subclass - ustic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

Certification Status: certified

QC Status: level 1

SITE

Landscape: piedmont slope

Landform: fan remnant

Geomorphic Component Hills: head slope

Hill Slope Profile: toeslope

Slope Position: upper third

Slope Shape Down: convex

Runoff: medium

Drainage Class: well

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 5/1/1986 (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
AGLE ARPUW LATR2	Agave lechuguilla Aristida purpurea var. wrightii Larrea tridentata	lechuguilla Wright's threeawn creosote bush	— — —	— — —	— — —

Pedon Restrictions
Kind	Hardness	Restriction Depth L-H	Restriction Thickness L-RV-H
		cm
petrocalcic	—	16 - 64	—

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon petrocalcic horizon	0—3 16—64	—- —-

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
5	—	—	986	—	90	326	706	—	19.5	—	—	—	—	—	—	—	PRISM	—	—

A—0 to 3 centimeters (0.0 to 1.2 inches); pale brown (10YR 6/3) interior, brown (10YR 4/3) interior, moist; gravelly sandy loam; moderate very fine subangular blocky structure; slightly hard, very friable; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 30 percent by volume 2-?-75 millimeter igneous, unspecified fragments; gr-l of Field estimated texture class; violent effervescence, by hcl, 1n; abrupt smooth boundary. Lab sample # 86P3739; dry when described; observed in trench. 5-10% surface fragments partially coated with carbonates. Few films and threads of CaCO3. Films and threads of CaCO3 on undersides of some pebbles.; few very fine roots throughout; effervescence is continuous

Bk—3 to 16 centimeters (1.2 to 6.3 inches); pale brown (10YR 6/3) interior, brown (10YR 4/3) interior, moist; very gravelly sandy loam; moderate very fine subangular blocky structure; slightly hard, very friable; 2.5 very fine roots throughout and 2.5 medium roots throughout; 2.5 very fine tubular pores; 55 percent by volume 2-?-75 millimeter igneous, unspecified fragments; grv-l of Field estimated texture class; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 86P3740; dry when described; observed in trench. Thin coatings of CaCO3 on undersides of most pebbles. Many films and threads of CaCO3. Most fragments less than 3 cm across with few to 10 cm across and occassional cobbles.; common medium roots throughout; common very fine roots throughout; effervescence is continuous

Bkkm—16 to 64 centimeters (6.3 to 25.2 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/3) interior, moist; cemented material; 35 percent by volume 8-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; clear wavy boundary. Lab sample # 86P3741; dry when described; observed in trench. 35% by volume rock fragments imbedded in horizon upto about 10 cm. Igneous and limestone gravels and cobbles. Laminear cap about 2 cm thick in about 10% of area. Hardness of 2.; effervescence is continuous

C—64 to 77 centimeters (25.2 to 30.3 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/3) interior, moist; extremely gravelly loamy coarse sand; very hard, friable; 11 percent coarse platy carbonate concretions; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; extremely gravelly sandy loam of Field estimated texture class; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3742; dry when described; observed in trench. Pebbles upto 10 cm across and concretions of CaCO3.; common coarse carbonate concretions concentrations; effervescence is continuous

2Bk—77 to 99 centimeters (30.3 to 39.0 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/4) interior, moist; very gravelly loamy coarse sand; soft, loose; 55 percent by volume 2-?-75 millimeter igneous, unspecified fragments; grv-sl of Field estimated texture class; violent effervescence, by hcl, 1n; abrupt wavy boundary. Lab sample # 86P3743; dry when described; observed in trench. All pebbles completely coated with carbonates. Pebbles well graded upto 3 cm across.; effervescence is continuous

3Bk—99 to 150 centimeters (39.0 to 59.1 inches); very pale brown (10YR 8/2) interior, very pale brown (10YR 7/3) interior, moist; extremely gravelly sandy loam; slightly hard, very friable; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt irregular boundary. Lab sample # 86P3744; dry when described; observed in trench. Coatings on pebbles and cobbles upto 3 mm thick. Few cobbles.; effervescence is continuous

4Ck—150 to 177 centimeters (59.1 to 69.7 inches); very pale brown (10YR 7/4) interior, yellowish brown (10YR 5/4) interior, moist; extremely gravelly coarse sandy loam; soft, loose; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt irregular boundary. Lab sample # 86P3745; dry when described; observed in trench. Few thin coatings of CaCO3 on undersides of some pebbles. Gravel upto 3 cm across and well graded.; effervescence is continuous

5Ck—177 to 185 centimeters (69.7 to 72.8 inches); pinkish white (7.5YR 8/2) interior, pink (7.5YR 7/4) interior, moist; extremely gravelly coarse sandy loam; slightly hard, very friable; 70 percent by volume 2-?-75 millimeter igneous, unspecified fragments; violent effervescence, by hcl, 1n; abrupt irregular boundary. Lab sample # 86P3746; dry when described; observed in trench. Coatings thin to about 3 mm on fragments. Well graded gravel upto 10 cm across. Consistence due to cementing of carbonates.; effervescence is continuous

6Ck—185 to 200 centimeters (72.8 to 78.7 inches); very pale brown (10YR 7/4) interior, yellowish brown (10YR 5/4) interior, moist; extremely gravelly loamy coarse sand; slightly hard, very friable; 65 percent by volume 2-?-75 millimeter igneous, unspecified fragments; grx-cosl of Field estimated texture class; strong effervescence, by hcl, 1n. Lab sample # 86P3747; dry when described; observed in trench. Thin carbonate coatings on lowersides of most pebbles, well graded gravel upto 5 cm across.; effervescence is discontinuous