LOCATION CLAIREMONT TX+KS+OK
Established Series
Rev. WER-JGF-ROG
11/2013
CLAIREMONT SERIES
The Clairemont series consists of very deep, well drained, moderately permeable soils that formed in calcareous silty alluvium derived from sandstone and siltstone of Perrmian age. These nearly level soils occur on flood plains of dissected plains. Slopes range from 0 to 2 percent. Mean annual precipitation is about 610 cm (24 in) and the mean annual temperature is about 17 degrees C (63 degrees F).
TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, thermic Typic Ustifluvents
TYPICAL PEDON: Clairemont silt loam--rangeland. (Colors are for dry soil unless otherwise stated.)
A--0 to 20 cm (0 to 8 in); reddish brown (5YR 5/4) silt loam, reddish brown (5YR 4/4) moist; compound moderate very fine granular, many wormcasts, and weak subangular blocky structure; hard, friable; common fine roots; common fine pores; few films and threads of calcium carbonate in the lower part; strongly effervescent; moderately alkaline; gradual boundary. Thickness is 10 to 36 cm (4 to 14 in).
C1--20 to 81 cm (8 to 32 in); reddish brown (5YR 5/4) silty clay loam, reddish brown (5YR 4/4) moist; massive, parting to angular blocky fragments with dull faces; faint bedding planes evident; hard, friable; few fine roots; few fine pores; few wormcasts; thin strata of very fine sandy loam and silt loam; few films and threads of calcium carbonate; strongly effervescent; moderately alkaline; diffuse boundary. Thickness is 41 to 91 cm (16 to 36 in).
C2--81 to 152 cm (32 to 60 in); reddish brown (5YR 5/4) silty clay loam, dark reddish brown (5YR 3/4) moist; massive, parting to granular fragments with dull faces; faint bedding planes evident; hard, friable; thin strata of fine sandy loam and silt loam; violently effervescent; moderately alkaline.
TYPE LOCATION: Kent County, Texas; 5 miles southwest of Clairemont on U. S. Highway 380, then 4.5 miles south on Farm Road 1231, then 0.5 mile west on unpaved county road to McKenzie Creek bridge, then 300 feet east and 50 feet north of bridge in native rangeland. USGS topographic quadrangle: Cooper Mountain, TX; Latitude: 33 degrees, 4 minutes, 56.058 seconds N; Longitude: 100 degrees, 51 minutes, 30.027 seconds W; NAD 83.
RANGE IN CHARACTERISTICS:
Soil Moisture: Typic-ustic soil moisture regime.
Typically, these soils are calcareous and non-saline throughout, but a few pedons are noncalcareous to a depth of 10 inches.
Some saline phases of this series are recognized.
Particle-size control section (weighted average)
Clay content: 18 to 35 percent
Sand content: 5 to 35 percent with less than 15 percent fine sand or coarser
A Horizon
Hue: 2.5YR, 5YR, 7.5YR
Value: 4 to 6 (Moist value and chroma are more than 3.5 in the surface layer)
Chroma: 3 to 6
Texture: silt loam, silty clay loam, loam, sandy clay loam, or clay loam.
Clay Content: 15 to 35 percent
Calcium carbonate equivalent: 1 to 10 percent
Electrical conductivity (mmhos/cm): 0 to 2
Sodium Adsorption Ratio: 0
Effervescence: slight to violent
Reaction: moderately alkaline
Some pedons have buried A horizons up to 25 cm (10 in) thick.
C Horizon
Hue: 5YR, 7.5YR
Value: 4 to 6
Chroma: 4 to 8
Texture: typically loam, silt loam, clay loam and silty clay loam, but thin strata of other textures occur in some pedons
Clay Content: 18 to 35 percent
Calcium carbonate equivalent: 2 to 15 percent
Electrical conductivity (mmhos/cm): 0 to 2
Sodium Adsorption Ratio: 0 to 4
Effervescence: slight to violent
Reaction: moderately alkaline
COMPETING SERIES: There are no other series in the same family. Similar soils are the
Colorado,
Mangum,
Norwood,
Spur,
Westola, and
Yomont series.
Colorado soils are fine-loamy in the particle-size control section.
Mangum soils have more than 35 percent clay in the particle-size control section.
Norwood soils are moist for longer periods.
Spur soils have mollic epipedons.
Westola and
Yomont soils have less than 18 percent clay in the particle-size control section.
GEOGRAPHIC SETTING:
Parent Material: calcareous silty alluvium derived from sandstone and siltstone of Permian age
Landscape: Dissected plains
Landform: Flood plain
Slope: 0 to 2 percent
Mean annual precipitation: 508 to 762 mm (20 to 30 in)
Thornthwaite annual P-E indices: 30 to 44
Mean annual air temperature: 13.9 to 18.3 degrees C (57 to 65 degrees F)
Frost- free period: 190 to 240 days
Elevation: 304.8 to 731.5 meters (1000 to 2400 feet)
GEOGRAPHICALLY ASSOCIATED SOILS: These include the similar
Colorado,
Mangum,
Spur,
Westola, and
Yomont series and the
Beckman and
Gracemont series.
Beckman soils have more than 35 percent clay in the particle-size control section.
Gracemont soils have a coarse-loamy particle-size control section and have a water table within 102 cm (40 in) of the soil surface.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is moderate. Runoff is negligible on slopes less than 1 percent and very low on 1 to 3 percent slopes. Flooding is frequent or occasional, unless protected.
USE AND VEGETATION: Mainly rangeland with short and midgrasses, some areas have heavy infestations of mesquite. A few areas are in cotton, grain sorghum, and wheat.
DISTRIBUTION AND EXTENT: The Central Rolling Red Plains, Western and Eastern Parts (MLRA-78B, 78C) and Rolling Limestone Prairie (MLRA-78A) of Texas, Oklahoma, and Kansas. The series is extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Garza County, Texas; 1970.
REMARKS: These soils formerly were included in the Norwood series.
Edited 11/2013 (RFG-ROG): Converted to tabular format and added metric measurements.
Diagnostic horizons and other features recognized in this pedon are:
Ochric epipedon - 0 to 20 cm (0 to 8 in). (A horizon)
Irregular distribution of organic matter (fluventic feature) - 20 to 152 cm (8 to 60 in). (C1 and C2 horizons)
Family criteria - particle-size control section contains less than 15 percent fine sand or coarser.
ADDITIONAL DATA: None
Taxonomic version: Keys to Soil Taxonomy, Eleventh Edition, 2010
National Cooperative Soil Survey
U.S.A.