LOCATION RUMPLE                  TX

Established Series
Rev. ALN-OWB-CLG
10/2016

RUMPLE SERIES

The Rumple series consists of moderately deep, well drained, moderately slowly permeable soils formed in residuum and colluvium derived from limestone. These gently to moderately sloping soils occur on backslopes of low hills on dissected plateaus. Slope ranges from 1 to 8 percent. Mean annual precipitation is about 686 mm (27 in), and mean annual air temperature is about 18.3 degrees C (degrees 65 F).

TAXONOMIC CLASS: Clayey-skeletal, mixed, active, thermic Typic Argiustolls

TYPICAL PEDON: Rumple gravelly clay loam--rangeland.
(Colors are for dry soil unless otherwise stated.)

A--0 to 13 cm (0 to 5 in); dark reddish brown (5YR 3/3) gravelly clay loam, reddish brown (5YR 2.5/3) moist; moderate fine subangular blocky and granular structure; very hard, firm; many roots; 15 percent angular chert fragments mostly 1/2 to 1 inch in diameter; neutral; clear smooth boundary. Thickness is 8 to 23 cm (3 to 9 in)

Bt1--13 to 25 cm (5 to 10 in); dark reddish brown (5YR 3/3) gravelly clay loam, dark reddish brown (5YR 3/3) moist; moderate fine subangular blocky structure; very hard, firm; many roots; few patchy clay films; 25 percent angular chert fragments less than 2 inches in diameter; few chert cobbles; slightly acid; clear wavy boundary. Thickness is 10 to 18 cm (4 to 7 in)

Bt2--25 to 66 cm (10 to 26 in); red (2.5YR 4/6) extremely gravelly clay, dark red (2.5YR 3/6) moist; moderate fine angular blocky structure; very hard, firm; common roots; 65 percent chert fragments less than 2 inches in diameter; few chert and limestone cobbles; common thin clay films on peds; slightly acid; abrupt wavy boundary. Combined thickness of the Bt horizon is 36 to 79 cm (14 to 31 in)

R--66 to 117 cm (26 to 46 in); white and gray indurated limestone, coarsely fractured; red clay in crevices.

TYPE LOCATION: McCulloch County, Texas. About 7 miles southeast of Brady, Texas. From the intersection of U.S. Highways 190 to 377 in Brady, 4.0 miles south of Brady on U.S. Highway 377 to junction with Texas Highway 71, 5.2 miles southeast on Texas Highway 71, 50 feet west of fence in rangeland.
USGS topographic quadrangle: Brady South, Texas;
Latitude: 31 degrees, 3 minutes, 15.02 seconds N;
Longitude: 99 degrees, 15 minutes, 26.83 seconds W;
Datum: NAD83.
UTM Zone, 14UTM Easting 475435.81 m, UTM Northing 3435634.12 m.

RANGE IN CHARACTERISTICS:
Soil Moisture: Typic ustic soil moisture regime. The soil moisture control section is dry in some or all parts for more than 90 but less than 150 days in normal years.
Depth to lithic contact: 50 to 100 cm (20 to 40 in)
Depth to argillic horizon: 8 to 23 cm (3 to 9 in)
Thickness of the mollic epipedon: 18 to 46 cm (7 to 18 in)

Particle-size control section (weighted average)
Clay content: 35 to 60 percent
Rock fragments: 35 to 75 percent

A Horizon
Hue: 2.5YR, 5YR, 7.5YR
Value: 3 to 5
Chroma: 2 to 3
Texture: loam, clay loam, and their gravelly or very gravelly counterparts
Clay content: 20 to 40 percent
Rock fragments: 10 to 45 percent total; chert and limestone; gravels, cobbles, and stones
Reaction (pH): Slightly acid or neutral (6.1 to 7.3)

Upper Bt Horizon
Hue: 2.5YR, 5YR
Value: 3 to 4
Chroma: 3 to 6
Texture: very or extremely, gravelly or cobbly, clay or clay loam
Clay content: 35 to 60 percent
Rock fragments: 35 to 75 percent total; chert and limestone; gravels, cobbles, and stones
Reaction (pH): slightly acid to slightly alkaline (6.1 to 7.8)

Lower Bt Horizon
Hue: 2.5YR, 5YR
Value: 3 to 4
Chroma: 4 to 6
Texture: very or extremely, gravelly or cobbly, clay
Clay content: 40 to 80 percent
Rock fragments: 35 to 75 percent total; chert and limestone; gravels, cobbles, and stones
Reaction (pH): slightly acid to moderately alkaline (6.1 to 8.4)

The R layer
Cementation: indurated or strongly cemented limestone and is dolomitic in some pedons. Chert and quartz fragments are embedded in the limestone in some pedons.

COMPETING SERIES: This is the Brico series in the same family. Similar soils are the Bexar, Georgetown, Rowden, Scullin, and Swenson series.
Brico soils: are more than 102 cm (40 in) deep over granitic materials.
Bexar, Georgetown, Rowden, Scullin, and Swenson soils: contain less than 35 percent coarse fragments in the particle-size control section. Georgetown and Scullin soils also occur in a more moist climate.

GEOGRAPHIC SETTING:
Parent material: Residuum and colluvium derived from limestone.
Landscape: Dissected plateaus
Landform: Summits, shoulders, and backslopes of Low hills
Slope: dominantly 1 to 4 percent, but ranges up to 8 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: 610 to 864 mm (24 to 34 in)
Thornthwaite P-E Index: 36 to 50
Mean annual air temperature: 17.8 to 20.0 degrees C (64 to 68 degrees F)
Frost-free period: 220 to 255 days
Elevation: 274.3 to 609.6 m (900 to 2000 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bexar, Frio, Roughcreek, Tarpley, and Tarrant series.
Bexar and Tarpley soils: contain less than 35 percent coarse fragments in the particle-size control section and occur on similar positions.
Frio soils: are very deep and occur on lower flood plains.
Roughcreek soils: are less than 51 cm (20 in) deep to bedrock and occur on similar positions.
Tarrant soils: are less than 51 cm (20 in) deep to bedrock, do not have an argillic horizon, and occur on higher positions.

DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderately slow. Runoff and internal drainage are medium.

USE AND VEGETATION: Used for rangeland. Native vegetation includes sideoats grama, pinhole bluestem, Texas wintergrass, Arizona cottontop, buffalograss, and curlymesquite grass. Woody vegetation includes scattered live oak, post oak, mesquite, land catclaw acacia.

DISTRIBUTION AND EXTENT: Eastern Edwards Plateau of Texas. The series is of moderate extent.

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

SERIES ESTABLISHED: McCulloch County, Texas; 1970.

REMARKS:
Edited 10/2016 (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:
Particle size control section: 25 to 66 cm (10 to 26 in). (Bt1 and Bt2 horizons)
Mollic epipedon: 0 to 25 cm (0 to 10 in) (A and Bt1 horizons)
Argillic horizon: 13 to 66 cm (5 to 26 in) (Bt1 and Bt2 horizons)
Lithic contact: Indurated Limestone bedrock at 66 cm (26 in).

ADDITIONAL DATA:
KSSL lab pedon No. 12N7662 with User ID S11TX209002
KSSL lab pedon No. 11N8428 with User ID S11TX307003
KSSL lab pedon No. 11N8435 with User ID S11TX411001
KSSL lab pedon No. 11N8436 with User ID S11TX411019
TAMU lab pedon No. S81TX-091-001 with User ID S81TX-091-001

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

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National Cooperative Soil Survey
U.S.A.