LOCATION TINN TX

Established Series
Rev. GLL-JAW-RMR-HLH
10/2020

TINN SERIES

The Tinn series consists of very deep, moderately well drained, very slowly permeable soils that formed in calcareous clayey alluvium. These soils are on flood plains of dissected plains that drain the Blackland Prairies. Slopes are dominantly less than 1 percent but range from 0 to 2 percent. Mean annual precipitation is about 991 mm (39.0 in) and the mean annual air temperature is about 18.3 degrees C (65.0 degrees F).

TAXONOMIC CLASS: Fine, smectitic, thermic Typic Hapluderts

TYPICAL PEDON: Tinn clay--cultivated. (Colors are for moist soil unless otherwise noted.)

Ap--0 to 15 cm (0 to 6 in); black (10YR 2/1) clay, very dark gray (10YR 3/1) dry; moderate coarse angular blocky structure parting to moderate very fine and fine angular blocky structure; very hard, very firm; plastic; few fine roots; few fine and medium pores; slightly effervescent; moderately alkaline; abrupt smooth boundary. (10 to 20 cm [4 to 8 in] thick)

A--15 to 46 cm (6 to 18 in); black (10YR 2/1) clay, very dark gray (10YR 3/1) dry; moderate coarse angular blocky structure parting to moderate very fine and fine angular blocky; very hard, very firm; few fine roots; few fine and medium pores; common pressure faces; about 2 percent fine siliceous pebbles, and about 2 percent fine ironstone pebbles; few worm casts; few medium grayish brown (2.5Y 5/2) streaks along root channels; slightly effervescent; moderately alkaline; gradual wavy boundary. (15 to 38 cm [6 to 15 in] thick)

Bss1--46 to 71 cm (18 to 28 in); black (10YR 2/1) clay, very dark gray (10YR 3/1) dry; moderate coarse angular blocky structure parting to moderate fine and medium angular blocky; very hard, very firm; few fine roots; few fine and medium pores; common fine pressure faces; common fine slickensides; about 2 percent fine siliceous pebbles, and about 2 percent fine ironstone pebbles; few worm casts; few medium grayish brown (2.5Y 5/2) streaks along root channels; slightly effervescent; moderately alkaline; gradual wavy boundary. (20 to 51 cm [8 to 20 in] thick)

Bss2--71 to 137 cm (28 to 54 in); black (10YR 2/1) clay, very dark gray (10YR 3/1) dry; moderate coarse angular blocky structure parting to moderate fine and medium angular blocky structure; very hard, very firm; few fine roots; few fine and medium pores; many prominent grooved slickensides that range from 5 to 10 cm across; most slickensides are oriented at 45 degrees; few fine black concretions; few medium calcium carbonate concretions that are pitted; about 2 percent siliceous pebbles; about 2 percent shell fragments; few worm casts; few coarse very dark gray (10YR 3/1) masses; slightly effervescent; moderately alkaline; gradual wavy boundary. (0 to 76 cm [0 to 30 in] thick)

Bss3--137 to 183 cm (54 to 72 in); very dark gray (10YR 3/1) clay, dark gray (10YR 4/1) dry; moderate coarse angular blocky structure parting to moderate fine and medium angular blocky; very hard, very firm; few fine roots; few fine and medium pores; common prominent grooved slickensides up to 1 m(3.3 ft) across, slickensides are oriented at 45 to 60 degrees; few fine and medium calcium carbonate concretions that are pitted; few worm casts; slightly effervescent; moderately alkaline; gradual wavy boundary. (25 to 61 cm [10 to 24 in] thick)

Bkssy--183 to 203 cm (72 to 80 in); very dark grayish brown (2.5Y 3/2) clay, dark grayish brown (2.5Y 4/2) dry, moderate coarse angular blocky structure parting to moderate fine and medium angular blocky; very hard, very firm; few fine roots; few fine and medium pores; few fine grooved slickensides up to 50 cm across, slickensides are oriented at 45 to 60 degrees; common fine and medium calcium carbonate concretions; few fine and medium masses of gypsum; few black (10YR 2/1) streaks; slightly effervescent; moderately alkaline.

TYPE LOCATION: Limestone County, Texas; from the intersection of Farm Road 171 and Farm Road 73 in Coolidge, 2.8 miles northeast on Farm Road 73, 0.6 miles north on county road, and 400 ft east on Pin Oak Creek floodplain in cropland.

USGS topographic quadrangle: Coolidge, TX;
Latitude 31 degrees, 48 minutes, 00.6 seconds N;
Longitude 96 degrees, 38 minutes, 03.5 seconds W

Decimal Degrees
Latitude: 31.8001667
Longitude: -96.6343056
Datum: WGS84

RANGE IN CHARACTERISTICS:

Soil Moisture: An Udic soil moisture regime. The soil moisture control section is not dry in any part for as long as 90 cumulative days per year.
Soil depth: greater than 203 cm (80 in)
Thickness of ochric epipedon: 25 to 58 cm (10 to 23 in)
Depth to secondary carbonates: 71 to 183 cm (28 to 80 in)
Depth to cambic horizon: 25 to 58 cm (6 to 58 in)
Depth to gypsum accumulations (when present): 121 to 203 cm (48 to 80 in)
Depth to salt accumulations (when present): 91 to 203 cm (36 to 80 in)
Vertic features: Slickensides and/or wedge-shaped aggregates begin at depths from 25 to 58 cm (10 to 23 in), becoming more distinctly expressed between 51 to 152 cm (20 and 60 in). Soil cracks when dry and the cracks are 1.3 to 5 cm (0.5 in to 2 in) wide and extend to a depth of more than 30 cm (12 in). The cracks remain open from 60 to 90 cumulative days in most years. Undisturbed areas have subdued gilgai, with microhighs 5 to 15 cm (2 to 6 in) higher than microlows.

Particle-size control section (weighted average)
Clay content: 42 to 60 percent

A horizon:
Hue: 10YR to 5Y
Value: 2 to 3 moist, 2 to 4 dry
Chroma: 1 to 3
Texture: silty clay or clay
Rock fragments: 0 to 2 percent; size-2 to 5 mm; kind-quartzite
Effervescence: very slight to strong
Reaction (pH): slightly alkaline to moderately alkaline (7.6-8.4)
Bw and Bk horizon (where present):
Hue: 10YR to 5Y
Value: 2 to 5
Chroma: 1 to 3
Texture: silty clay or clay
Rock fragments: 0 to 2 percent; size-2 to 5 mm; kind-quartzite
Identifiable secondary carbonates: amount-0 to 5 percent, kind- calcium carbonate masses and concretions.
Effervescence: very slight to strong
Reaction (pH): slightly alkaline to moderately alkaline (7.6-8.4)

Bss, Bssy, Bkssy, and Bkss horizons:
Hue: 10YR to 5Y
Value: 3 to 6
Chroma: 1 to 4
Texture: silty clay or clay Slickensides/Pressure faces: 5 to 50 percent/0 to 50 percent
Redox concentrations: amount-0 to 5 percent, shades- brown, olive or yellow
Rock fragments: 0 to 4 percent; size-2 to 5 mm; kind-quartzite
Identifiable secondary carbonates: amount-0 to 5 percent, kind- calcium carbonate masses and concretions
Gypsum (where present): amount-1 to 5 percent, kind-gypsum masses and crystals
Effervescence: very slight to strong
Reaction (pH): slightly alkaline to moderately alkaline (7.6-8.4)

COMPETING SERIES: These are the Eastham and Hallsbluff series. Similar soils are the Branyon, Burleson, Kaufman, and Trinity soils.

Eastham soils: are not calcareous in the upper 51 cm (20 in).
Hallsbluff soils: have a mollic epipedon with chroma of 2.
Branyon and Burleson soils: are Usterts. In addition, Burleson soils are noncalcareous in the upper 51 cm (20 in).
Kaufman and Trinity soils: have very-fine control sections.

GEOGRAPHIC SETTING:

Parent material: calcareous clayey alluvium
Landscape: dissected plains
Landform: flood plains
Microrelief: on subdued gilgai in undisturbed areas with microknolls 5 to 15 cm (2 to 6 in) higher than microdepressionsSlope: 0 to 2 percent, mainly less than 1 percent
Mean annual precipitation: 692 to 1197 mm (27 to 47 in).
Mean annual air temperature: 17.0 to 21.7 degrees C (63 to 71 degrees F)
Frost-free period: 224 to 279 days
Elevation: 43 to 399 m (141 to 1309 ft)
Thornthwaite P-E Index: exceed 44

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Branyon, Burleson, Ferris, Heiden, Houston Black, and Trinity series.

Branyon and Burleson soils: are on higher terrace positions.
Ferris and Heiden soils: have chroma of 2 or more in the upper 30 cm (12 in).
Houston Black soils: have greater amplitude of waviness and are on uplands in a higher position.
Trinity soils: have very-fine particle-size control sections and are in similar positions.

DRAINAGE AND PERMEABILITY:

Drainage class: Moderately well.
Permeability class: Very slow.
Runoff: high on slopes less than 1 percent and very high on slopes of 1 to 2 percent.
Wetness: Flooding is common except where the soil is protected. Duration of flooding is very brief or brief.

USE AND VEGETATION: Most areas are in pasture or cultivated to crops such as cotton, corn, sorghums, or small grains. Native vegetation is elm, hackberry, oak, and ash, with an understory of grasses such as species of paspalums and panicums.

DISTRIBUTION AND EXTENT:
General area: mainly in Central Texas on streams draining the Blackland Prairies (MLRA 86)
Land Resource Region: J - Southwestern Prairies Cotton and Forage Region
Major Land Resource Area: 86A - Texas Blackland Prairie, Northern Part
Extent: extensive

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Hill County, Texas; 1975.

REMARKS: Classification of the Tinn series was changed from Vertic Haplaquolls to Typic Pelluderts (3/88). This change was based on several years study and analysis of the soils mapped in the Tinn series. The series type location was moved from Hill County to Limestone County to a pedon that is near the center of the series range in characteristics and near the center of the geographic distribution. Classification change from Typic Pelluderts to Typic Hapluderts based on Amendment 16, SOIL TAXONOMY (2/94).

Diagnostic horizons and features recognized in this pedon are:

Ochric Epipedon: 0 to 46 cm (0 to 18 in) (Ap, A horizons)

Vertic Properties: slickensides from 46 to 203 cm (18 to 80 in) (Bss1, Bss2, Bkssy horizons)

Gypsum accumulations: 183 to 203 cm (72 to 80 in) (Bkssy horizons)

Identifiable secondary calcium carbonate: 71 to 203 cm (28 to 80 in) (Bss2, Bss3, Bkssy horizons)

ADDITIONAL DATA: Kellogg Laboratory data from Caldwell County (S10TX0550011)

KSSL Data from Bell County, TX (S08TX027004)

TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014.

National Cooperative Soil Survey
U.S.A.