LOCATION RENICK                  TX

Established Series
Rev. WHD:JEA:CLG
09/2016

RENICK SERIES

The Renick series consists of very shallow to shallow, well drained soils that formed over serpentine bedrock. These soils are on ridges on dissected plateaus. Slopes range from 3 to 12 percent. Mean annual air temperature is about degrees 19.4 C (67 degrees F), and mean annual precipitation is about 787 mm (31 in).

TAXONOMIC CLASS: Clayey, smectitic, thermic Ruptic-Lithic Haplustolls

TYPICAL PEDON: Renick clay loam, in rangeland
(Colors are for dry soil unless otherwise stated.)

A1--0 to 20 cm (0 to 8 inc); dark grayish brown (10YR 4/2) clay loam, very dark grayish brown (10YR 3/2) moist; moderate fine subangular blocky structure; hard, friable, sticky; many fine roots; about 10 percent by volume of serpentine fragments ranging from 1/4 to 1/2 inch in diameter; neutral; clear smooth boundary.

A2--20 to 38 cm (8 to 15 in); brown (10YR 4/3) clay loam, dark brown (10YR 3/3) moist; moderate fine and medium subangular blocky structure; hard, friable, sticky; common fine and medium roots; 10 to 15 percent serpentine fragments 1/4 to 1/2 inch in size; neutral; clear wavy boundary. Combined thickness of the A1 and A2 horizons is 5 to 41 cm (2 to 16 in) thick

A3--38 to 48 cm (15 to 19 in); brown (10YR 4/3) gravelly clay, dark brown (10YR 3/3) moist; moderate fine and medium subangular blocky structure; hard, friable, sticky; 20 percent by volume, soft and cemented angular fragments 1/4 to 1 inch in size of serpentine fragments; few fine roots; neutral; clear wavy boundary. Thickness of the A3 horizon is 0 to 10 cm (0 to 4 inches thick)

R--48 to 56 cm (19 to 22 in); light olive gray (5Y 6/2) bed of indurated fractured and tilted serpentine with few roots in fractures.

TYPE LOCATION: Gillespie County, Texas; Renick Ranch, 0.15 mile south to private road, then west 1.1 mile (across Coal Creek) to Coal Creek Road, which point is 6.5 miles northeast of Willow City, Texas.
USGS topographic quadrangle: Willow City, Texas;
Latitude: 30 degrees, 28 minutes, 30 seconds N;
Longitude: 98 degrees, 37 minutes, 40.7 seconds W;
Datum: WGS84.

RANGE IN CHARACTERISTICS:

Soil Moisture: Typic-Ustic soil moisture regime.
Solum thickness and Depth to lithic contact: 5 to 51 cm (2 to 20 in)
Thickness of the mollic epipedon: 2 to 51 cm (2 to 20 in)
Other feature: The dominant part of the pedon has a mollic epipedon. This horizon is interrupted within each pedon by a horizon 2 to 4 inches thick that is too thin to qualify as a mollic epipedon.

Particle-size control section (weighted average)
Clay content: 36 to 45 percent
Rock fragments: 5 to 35 percent

The A horizons
Hue: 7.5YR, 10YR
Value: 3 to 4 dry, 2 to 3 moist
Chroma: 2 to 3 dry or moist
Texture: clay loam or clay and their gravelly counterparts
Clay content: 35 to 50 percent
Rock fragments: 5 to 35 percent total; serpentine gravel to stones
Effervescence: None to slight
Reaction (pH): Slightly acid to slightly alkaline (6.1 to 7.8)

The R layer
Hue: 5Y
Value: 6 or 7
Chroma: 2
Bedrock: Indurated Serpentine
Tilt: 30 to 60 degrees from horizontal
Outcrops: have a parallel alignment and occur 3 to 24 feet apart

COMPETING SERIES: There are no series in the same family. Similar soils include the Cornick, Eckert, Eckrant, and Harper series.
Cornick soils: have less than 35 percent clay content in the particle-size control section and formed from gypsum
Eckert and Eckrant soils: have more than 35 percent rock fragments in the particle-size control section and formed from limestone
Harper soil:

GEOGRAPHIC SETTING:
Parent material: Clayey residuum derived from the Coal Creek formation of pre-Cambrian age serpentinite.
Landscape: Dissected plateaus
Landform: Ridges
Slope: 3 to 12 percent
Precipitation Pattern: The majority of the yearly amount occurs during the fall and spring months. The winter and summer months are normally drier.
Mean annual precipitation: 660 to 813 mm (26 to 32 in)
Thornthwaite P-E Index: 40 to 46
Mean annual air temperature: 18.3 to 20.0 degrees C (65 to 68 degrees F)
Frost-free period: 215 to 240 days
Elevation: 304.8 to 457.3 m (1000 to 1500 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Katemcy and Ligon series.
Katemcy and Ligon soils: have argillic horizons and formed on nearby areas in schist.

DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately slow permeability.

USE AND VEGETATION: Used entirely for rangeland. Vegetation is Texas wintergrass, fall witchgrass, curlymesquite, sideoats grama, and some silver bluestem. Woody vegetation is sparse, consisting of a few live oak, mesquite, Texas persimmon, and pricklypear.

DISTRIBUTION AND EXTENT: The Central Basin of Texas. The series is of minor extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Gillespie County, Texas; 1970.

REMARKS:
Edited 09/2016 (RFG-THW): Changed to tabular format. Added metric measurements. Updated competing series, geographic setting, and associated soils sections.

Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - 0 to 48 cm (0 to 19 in).
Lithic contact at 48 cm (19 in).
The exchange complex is dominated by magnesium.

ADDITIONAL DATA: TAMU data for pedon ID: S09TX171003
A mineralogical and genetic study of serpentine derived soils in Gillespie County, Texas; masters thesis by Hamouda Mohamed Maoui, Texas Tech University, Lubbock, Texas.

Taxonomic Version: Keys to Soil Taxonomy, 12th Edition, 2014.

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National Cooperative Soil Survey
U.S.A.