LOCATION RENTHIN                 OK

Established Series
Rev. CEW:CS:CRC:JLD
02/2016

RENTHIN SERIES

The Renthin series consists of deep, well drained, very slowly permeable soils formed in material weathered from clayey and silty shale of Permian age. These very gently sloping to gently sloping soils are on convex ridges and side slopes of prairie uplands in the Central Rolling Red Prairies (MLRA-80A). Slope ranges from 1 to 5 percent. Mean annual temperature is 16.1 degrees C (61 degrees F), and mean annual precipitation is 914 mm (36 in).

TAXONOMIC CLASS: Fine, mixed, superactive, thermic Udertic Argiustolls

TYPICAL PEDON: Renthin silt loam-native hay meadow, at an elevation of 363 m (1190 ft). (Colors are for dry soil unless otherwise stated.)

A--0 to 10 cm (0 to 4 in); brown (7.5YR 4/2) silt loam, dark brown (7.5YR 3/2) moist; weak medium platy structure parting to weak fine granular; hard, friable; many very fine and few fine roots; many very fine and fine pores; neutral; clear smooth boundary. (Thickness of the A horizon is 10 to 25 cm [4 to 10 in])

BA--10 to 25 cm (4 to 10 in); brown (7.5YR 4/2) clay loam, dark brown (7.5YR 3/2) moist; weak fine subangular blocky structure parting to moderate fine granular; very hard, firm; many very fine and few fine roots; many very fine and fine pores; common worm casts; slightly acid; clear smooth boundary. (Thickness of the BA horizon is 0 to 15 cm [0 to 6 in])

Bt1--25 to 38 cm (10 to 15 in); reddish brown (5YR 4/3) clay, dark reddish brown (5YR 3/3) moist; weak medium prismatic structure parting to moderate fine subangular blocky; very hard, very firm; many very fine and few fine roots; common very fine and fine pores; common distinct clay films on vertical faces; slightly acid; gradual smooth boundary. (4 to 20 inches thick)

Bt2--38 to 56 cm (15 to 22 in); reddish brown (2.5YR 4/4) clay, dark reddish brown (2.5YR 3/4) moist; moderate medium prismatic structure parting to moderate medium blocky; extremely hard, extremely firm; many very fine and few fine roots; many very fine and common fine pores; common distinct clay films on vertical and horizontal faces; vertical cracks filled with A horizon material; slightly acid; clear wavy boundary. (Combined thickness of the Bt horizon 0 to 51 cm [0 to 20 in])

Btss--56 to 74 cm (22 to 29 in); red (2.5YR 4/6) clay, dark red (2.5YR 3/6) moist; moderate medium prismatic structure parting to strong medium blocky; extremely hard, extremely firm; common very fine and few fine roots; few very fine and fine pores; common slickensides; common distinct clay films on vertical and horizontal faces; neutral; gradual wavy boundary. (Thickness of the Btss horizon is 0 to 51 cm [0 to 20 in])

Btkss--74 to 107 cm (29 to 42 in); red (2.5YR 4/6) clay, dark red (2.5YR 3/6) moist; weak coarse prismatic structure parting to strong medium blocky; extremely hard, extremely firm; common very fine roots; few very fine and fine pores; common slickensides; common distinct clay films on vertical and horizontal faces 30 percent by volume; common calcium carbonate masses; few fine and medium calcium carbonate concretions; few fine and medium black concretions 2 percent by volume; slightly alkaline; gradual wavy boundary. (Thickness of the Btkss horizon is 15 to 97 cm [6 to 38 in])

Btk--107 to 140 cm (42 to 55 in); red (2.5YR 5/6) clay loam, red (2.5YR 4/6) moist; weak coarse prismatic structure parting to moderate medium blocky; very hard, very firm; few very fine roots; common very fine and few fine pores; few distinct clay films on vertical faces; few medium calcium carbonate soft masses; few medium calcium carbonate concretions; fine and medium black concretions 10 percent by volume; moderately alkaline; clear wavy boundary. (Thickness of the Btk horizon is 15 to 97 cm [6 to 38 in])

Cr1--140 to 168 cm (55 to 66 in); reddish brown (2.5YR 4/4), red (2.5YR 5/6), and pale yellow (2.5Y 7/4) laminated shale, sandstone, and siltstone, dark reddish brown (2.5YR 3/4), red (2.5YR 4/6), and light yellowish brown (2.5Y 6/4) moist; hard; very few very fine roots in fractures; strongly alkaline; clear wavy boundary.

Cr2--168 to 196 cm (66 to 77 in); red (2.5YR 5/6) and light gray (2.5Y 7/2) very fine grained sandstone, red (2.5YR 4/6) and light brownish gray (2.5Y 6/2) moist; hard; strongly alkaline.

TYPE LOCATION: Oklahoma County, Oklahoma; about 2 miles east and 1/2 mile north of Britton, Oklahoma; about 2500 feet north and 1500 feet east of the southwest corner of sec. 26, T. 13 N., R. 3 W.

USGS topographic quadrangle: Spencer, OK
Latitude: 35 degrees, 34 minutes, 21 seconds N
Longitude: 97 degrees, 29 minutes, 25 seconds W
Datum: NAD 83

Decimal Degrees:
Latitude: 35.5724600
Longitude: -97.4909900

UTM Easting: 636739 m
UTM Northing: 3937578 m
UTM Zone: 14N

RANGE IN CHARACTERISTICS:
Depth to bedrock: 102 to 152 cm (40 to 60 in)
Depth to secondary carbonates: 48 to 132 cm (19 to 52 in)
Depth to slickensides: 56 to 107 cm (22 to 42 in)
Linear extensibility: 6.0 cm or more between the mineral soil surface and either a depth of 100 cm (40 in) or a paralithic contact
Clay content: 35 to 45 percent within a depth of 38 cm (15 in)
Electrical conductivity (mmhos/cm): 0 to 1

A or Ap horizon:
Hue: 5YR or 7.5YR
Value: 4 or 5 dry, 3 moist
Chroma: 2 to 4 dry or moist
Texture: silt loam, silty clay loam or clay loam
Effervescence: none
Reaction: slightly acid to neutral

BA horizon:
Hue: 2.5YR to 7.5YR,
Value: 4 or 5 dry, 3 or 4 moist
Chroma: of 2 to 4 dry or moist
Texture: silty clay loam or clay loam. This horizon is absent in most cultivated areas where moderate erosion has removed much of the original Other features: the A horizon and this horizon are mixed with the A horizon and now designated as an Ap horizon.
Effervescence: none
Reaction: slightly acid to slightly alkaline

Bt horizons:
Hue: 2.5YR or 5YR,
Value: 4 or 5 dry or moist
Chroma: 4 to 8 dry or moist
Texture: silty clay loam, silty clay, or clay
Clay content: 35 to 55 percent
Effervescence: none to slight
Reaction: slightly acid to moderately alkaline

Btss horizon:
Hue: 2.5YR or 5YR
Value: 4 to 6 dry or moist
Chroma: 4 to 6 dry r moist
Texture: silty clay or clay
Clay content: 40 to 55 percent
Effervescence: none to slightly
Reaction: slightly acid to moderately alkaline

Btkss horizon:
Hue: 2.5YR or 5YR
Value: 4 or 5 dry or moist
Chroma: 4 to 8 dry or moist
Texture: silty clay loam, silty clay, or clay
Clay content: 35 to 55 percent
Secondary carbonates: 1 to 5 percent
Sodium adsorption ratio: 0 to 1
Effervescence: slight to strong
Reaction: slightly alkaline or moderately alkaline

Btk horizon:
Hue: 2.5YR or 5YR
Value: 4 or 5 dry or moist
Chroma: 4 to 8 dry or moist
Texture: silty clay loam, silty clay, clay loam, or clay
Clay content: 35 to 55 percent
Secondary carbonate: 1 to 5 percent
Sodium adsorption ratio: 0 to 2
Effervescence: strong
Reaction: moderately alkaline

BC horizon (where present):
Hue: 2.5YR or 5YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silty clay loam, clay loam, silty clay, or clay
Clay content: 35 to 55 percent
Shale fragments: amount-0 to 35 percent by volume; size-2 to 76 mm
Sodium adsorption ratio: 0 to 2
Effervescence: none to slight
Reaction: moderately alkaline

Cr horizons:
Hue: 2.5YR
Value: 4 to 6 dry or moist
Chroma: 4 to 8 dry or moist
Sodium adsorption ratio: 0 to 8
Effervescence: none to slight
Reaction: moderately alkaline

COMPETING SERIES: These are the Brewless, Dilworth, Piedmont, and Wetbeth series.
Brewless soils: are very deep and are on flood plains
Dilworth and Piedmont soils: have solum 51 to 102 cm (20 to 40 in) thick over bedrock
Wetbeth soils: are very deep and developed in alluvium

GEOGRAPHIC SETTING:
Parent material: formed in material weathered from clayey shale of Permian age
Landscape: uplands
Landform: on very gently sloping to gently sloping, broad and smooth convex ridges and side slopes
Slope: 1 to 5 percent
Mean annual precipitation: 838 to 991 mm (33 to 38 in)
Mean annual air temperature: 14.4 to 17.2 degrees C (58 to 63 degrees F) Frost-free period: 181 to 240 days
Elevation: 259 to 381 m (700 to 1250 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bethany, Grainola, Grant, Huska, Kingfisher, Kirkland, Lucien, Norge, Piedmont, Renfrow, and Zaneis series.
Bethany and Kirkland soils: on higher stream terrace positions and have a mollic epipedon more than 51 cm (20 in) thick
Norge soils: on lower stream terrace positions closer to the stream and have a fine-silty control section
Renfrow soils: on similar positions, have a solum more than 152 cm (60 in), and have an argillic horizon that does not decrease in clay content by more than 20 percent at a depth of 152 cm (60 in)
Grainola soils: do not have a mollic epipedon and have a solum thickness of 51 to 102 cm (20 to 40 in)
Kingfisher soils: have a fine-silty control section and have a solum thickness of 51 to 102 cm (20 to 40 in)
Grant soils: on similar positions, and have a fine-silty control section Huska soils: on similar positions, do not have a mollic epipedon and have a natric horizon
Lucien soils: on lower positions, have a solum 25 to 51 cm (10 to 20 in) thick, and have a loamy control section
Piedmont soils: occur on similar positions, but at lower elevations near drainage channels
Zaneis soils: on similar positions, have a fine-loamy control section, and do not have secondary calcium carbonate accumulations

DRAINAGE AND PERMEABILITY:
Drainage: Well drained
Permeability: very slow
Runoff: very high

USE AND VEGETATION: Most areas are cultivated to wheat or other small grains; lesser amounts are in grain sorghum or hybrid forage sorghums. Some old fields have been sprigged to bermudagrass or seeded to old world bluestems and used for hay or tame pasture. Native vegetation consists mostly of tall and mid grasses.

DISTRIBUTION AND EXTENT: LRR H; Central Rolling Red Prairies (MLRA 80A) of Oklahoma. The series is of moderate extent.

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

SERIES ESTABLISHED: Logan County, Oklahoma 1994

REMARKS: This series was formally included in the Renfrow, Vernon, and Zaneis series in earlier surveys. The name Renthin was coined from the Renfrow series and the word thin, since this series differs only in solum thickness from the Renfrow series.

Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: 0 to 38 cm (0 to 15 in) (A, BA, and Bt1 horizons)
Argillic horizon: 25 to 140 cm (10 to 55 in) (Bt horizons)
Accumulation of calcium carbonate: 74 to 140 cm (29 to 55 in) (Bk horizons)
Ustolls: soil moisture control section dry in some part more than 90 days
Udertic: Cracks within 125 cm (49 in) of the mineral soil surface that are 5 mm or more wide through a thickness of 30 mm (1 in) or more for some time in most years, and slickensides or wedge-shaped aggregates in a layer 15 cm (6 in) or more thick that has its upper boundary within 125 cm (49 in) of the mineral soil surface, or a linear extensibility of 6.0 cm or more between the mineral soil surface and either a depth of 100 cm (39 in) or a paralithic contact, whichever is shallower.
Cr horizon: the paralithic rock-like material at a depth of 140 cm (55 in)

Soil Interpretation Record: OK0346 Renthin Series

ADDITIONAL DATA: Lab data from KSSL - S91OK-109-001, complete characterization, Lincoln, Nebraska.

Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014

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National Cooperative Soil Survey
U.S.A.