LOCATION IRONMOUND OK

Established Series
Rev. JGF:RCW:JLD
03/2016

IRONMOUND SERIES

The Ironmound series consists of shallow, well drained soils that formed in material weathered from sandstone, or sandstone interbedded with siltstone or shale, of Permian age. These soils are on crests and side slopes of low hills in the Central Rolling Red Prairies (MLRA 80A). Slope ranges from 1 to 40 percent. Mean annual air temperature is about 16.1 degrees C (61 degrees F), mean annual precipitation is about 914 mm (36 in).

TAXONOMIC CLASS: Loamy, mixed, active, thermic, shallow Udic Haplustepts

TYPICAL PEDON: Ironmound loam under tame pasture, at an elevation of 305 m (1000 ft). (Colors are for dry soil unless otherwise stated).

Ap--0 to 18 cm (0 to 7 in); reddish brown (5YR 4/4) loam, dark reddish brown (5YR 3/4) moist; moderate medium subangular blocky structure parting to moderate medium granular; hard, friable; many very fine and fine roots; common very fine and fine pores; slightly acid; clear smooth boundary. (Thickness of the A horizon is 10 to 20 cm [4 to 8 in])

Bw--18 to 41 cm (7 to 16 in); red (2.5YR 4/6) loam, dark red (2.5YR 3/6) moist; moderate medium subangular blocky structure; hard, friable; common very fine and fine roots; common very fine and fine pores; neutral; clear smooth boundary. (Thickness of the Bw horizon is 13 to 36 cm [5 to 14 in])

Cr--41 to 102 cm (16 to 40 in); red (2.5YR 4/6) weathered sandstone, dark red (2.5YR 3/6) moist; neutral.

TYPE LOCATION: Logan County, Oklahoma; 1 mile west and 2 miles north of Lovell; 500 feet west and 1300 feet north of the southeast corner of Sec. 30, T. 19 N., R. 4 W

USGS topographic quadrangle: Lovell, OK
Latitude: 36 degrees 5 minutes 27.24 seconds north
Longitude: 97 degrees 41 minutes 45.24 seconds west
Datum: NAD 83

Decimal degrees:
Latitude: 36.0909
Longitude: -97.6590

UTM Easting: 620731 m
UTW Northing: 3994840 m
UTM Zone: 14N

RANGE IN CHARACTERISTICS:
Depth to bedrock: 25 to 51 cm (10 to 20 in)

Ap horizon:
Hue: 2.5YR or 5YR
Value: 3 to 5, 4 to 6 dry
Chroma: 2 to 6 dry or moist
Texture: fine sandy loam, very fine sandy loam, loam or silt loam
Coarse fragments: amount-0 to 10 percent by volume; size- less than 76 mm (3 in); kind-sandstone fragments
Effervescence: none
Reaction: moderately acid to moderately alkaline

Bw horizon:
Hue: 10R to 2.5YR
Value: 3 to 5, 4 to 6 dry
Chroma: 4 to 6 dry or moist
Texture: fine sandy loam, loam, or sandy clay loam
Coarse fragments: amount-0 to 10 percent by volume; size- less than 76 mm (3 in); kind-sandstone fragments
Effervescence: none
Reaction: slightly acid to moderately alkaline

Cr horizon:
Hue: 10R to 2.5YR
Value: 5 to 6, 3 to 5 moist
Chroma: 4 to 8 dry or moist
Bedrock: weathered sandstone or shale, or sandstone interbedded with siltstone or shale. This material is root restrictive.
Effervescence: none
Reaction: neutral to moderately alkaline

COMPETING SERIES: There are no competing series in this family. Soils in similar families are Darnell, Dill, Loco, and Lucien.
Darnell soils: have siliceous mineralogy
Dill soils: have bedrock deeper than 51 cm (20 in)
Loco and Lucien soils: have mollic epipedons

GEOGRAPHIC SETTING:
Parent Material: sandstone interbedded with siltstone or shale of Permian age
Landscape: hills
Landform: low hills
Geomorphic Component: crests and side slopes
Hillslope Position: summits, shoulders, and backslopes
Slope: 1 to 40 percent
Mean annual precipitation: 787 to 991 mm (31 to 39 in)
Mean annual air temperature: 15 to 17.2 degrees C (59 to 63 degrees F)
Frost-Free Period: 181 to 240 days
Elevation: 320 to 488 m (1050 to 1600 ft)
Thornthwaite Annual P-E indices: 44 to 64

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coyle, Grainola, Kingfisher, Masham, Piedmont, and Zaneis soils, all of which are greater than 51 cm (20 in) to bedrock.
Coyle and Kingfisher soils: occur on similar positions
Grainola, Masham, and Piedmont soils: occur on lower side slopes
Zaneis soils: occur on higher crests and upper side slopes

DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: high
Saturated hydraulic conductivity: moderately rapid
Runoff: negligible on 1 to 3 percent slopes, very low on 3 to 5 percent slopes, low on 5 to 10 percent slopes, medium on 10 to 20 percent slopes, and high on slopes greater than 20 percent

USE AND VEGETATION: Used for livestock grazing. Some of the less sloping areas are cultivated to small grains or tame pasture. Native vegetation consists of short to tall prairie grasses.

DISTRIBUTION AND EXTENT: Central Oklahoma; Land Resource Region H; MLRA 80A. The soil is of moderate extent.

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

SERIES ESTABLISHED: Logan County, Oklahoma, 1994.

REMARKS:

These soils were formerly mapped as Lucien. Extensive revisions by due to the Soil Data Join Recorrelation Imitative (SDJR) by JLD 03/2016

Diagnostic horizons and features in this pedon are:
Ochric epipedon: 0 to 18 cm (0 to 7 in) (Ap horizon)
Cambic horizon: 18 to 41 cm (7 to 16 in) (Bw horizon)
Paralithic contact: at a depth of 41 cm (16 inches) (Cr horizon)

ADDITIONAL DATA: None

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

National Cooperative Soil Survey
U.S.A.