LOCATION NAVILLETON INEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, mesic Typic Paleudalfs
TYPICAL PEDON: Navilleton silt loam on a 7 percent slope in a pasture field at an elevation of about 256 meters (840 feet) above MSL. (Colors are for moist soil unless otherwise stated.)
Ap1--0 to 13 cm (0 to 5 inches); brown (10YR 4/3) silt loam, pale brown (10YR 6/3) dry; weak fine and medium subangular blocky structure parting to moderate medium granular; very friable; strongly acid; clear smooth boundary.
Ap2--13 to 20 cm (5 to 8 inches); 70 percent dark yellowish brown (10YR 4/4) and 30 percent strong brown (7.5YR 5/6) silt loam; moderate fine and medium subangular blocky structure parting to weak fine and medium granular; very friable; common fine rounded black (10YR 2/1) iron and manganese concretions throughout; moderately acid; clear smooth boundary. [Combined thickness of the A horizon is 8 to 25 cm (3 to 10 inches.)]
Bt1--20 to 30 cm (8 to 12 inches); strong brown (7.5YR 5/6) silt loam, moderate fine subangular blocky structure; friable; common distinct strong brown (7.5YR 4/6) clay films on faces of peds; few prominent dark yellowish brown (10YR 4/4) organic coatings on faces of peds and in pores; common fine rounded black (10YR 2/1) iron and manganese concretions throughout; moderately acid; clear smooth boundary.
Bt2--30 to 64 cm (12 to 25 inches); dark yellowish brown (10YR 4/6) silty clay loam; moderate fine and medium subangular blocky structure; friable; many distinct strong brown (7.5YR 4/6) clay films on faces of peds; common fine rounded black (10YR 2/1) iron and manganese concretions throughout; moderately acid; clear smooth boundary.
Bt3--64 to 89 cm (25 to 35 inches); dark yellowish brown (10YR 4/6) silty clay loam; moderate fine subangular blocky structure; friable; many distinct light yellowish brown (10YR 6/4) silt coatings on faces of peds; common distinct strong brown (7.5YR 4/6) clay films on faces of peds; common fine rounded black (10YR 2/1) iron and manganese concretions throughout; moderately acid; clear wavy boundary. [Combined thickness of the Bt horizon is 43 to 86 cm (17 to 34 inches.)]
2Bt4--89 to 109 cm (35 to 43 inches); strong brown (7.5YR 4/6) silty clay; moderate fine subangular blocky structure; friable; common prominent pale brown (10YR 6/3) and brown (7.5YR 4/4) clay films on faces of peds; common fine rounded black (10YR 2/1) iron and manganese concretions throughout; 3 percent subrounded chert gravel; strongly acid; clear wavy boundary.
2Bt5--109 to 137 cm (43 to 54 inches); yellowish red (5YR 5/6) clay; moderate very fine and fine angular blocky structure; firm; many prominent yellowish red (5YR 4/6) and few prominent brown (10YR 5/3) clay films on faces of peds; common fine and medium rounded black (10YR 2/1) iron and manganese concretions throughout; 3 percent angular chert gravel; neutral; clear wavy boundary.
2Bt6--137 to 155 cm (54 to 61 inches); yellowish red (5YR 4/6) clay; moderate very fine angular blocky structure; firm; many distinct yellowish red (5YR 4/6) clay films on faces of peds; common fine and medium rounded black (10YR 2/1) iron and manganese concretions throughout; 3 percent angular chert gravel; neutral; clear wavy boundary.
2Bt7--155 to 183 cm (61 to 72 inches); strong brown (7.5YR 4/6) silty clay; moderate fine angular blocky structure; firm; many prominent dark yellowish brown (10YR 4/4) and few prominent very dark grayish brown (10YR 3/2) and strong brown (7.5YR 5/6) clay films on faces of peds; 3 percent angular chert gravel and 3 percent limestone flagstones; slightly alkaline; slightly effervescent from 180 to 183 cm (71 to 72 inches); abrupt wavy boundary.[(Combined thickness of the 2Bt horizon is 76 to more than 152 cm (30 to more than 60 inches.)]
2R--183 to 203 cm (72 to 80 inches); indurated limestone bedrock.
TYPE LOCATION: Floyd County, Indiana. 2100 feet west and 540 feet south of the northeast corner of sec. 36, T. 1 S., R. 4 E. USGS Palmyra topographic quadrangle; lat. 38 degrees 23 minutes 16 seconds N. and long. 86 degrees 01 minutes 18 seconds W., NAD 27, UTM Zone 16, 585444 easting and 4249300 northing, NAD 83.
RANGE IN CHARACTERISTICS:
Thickness of the loess: 51 to 102 cm (20 to 40 inches)
Depth to the base of the argillic horizon and to bedrock (lithic contact): 152 to more than 254 cm (60 to more than 100 inches)
Ap horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 3 to 6
Texture: silt loam
Reaction: very strongly acid to neutral
A horizon (5 to 10 cm or 2 to 4 inches), where present:
Depth:
Hue: of 10YR
Value: 2 or 3
Chroma: 1 to 3
Texture: silt loam
Reaction: very strongly acid or strongly acid
BE horizon, where present:
Hue: 10YR
Value: 5 or 6
Chroma: 3 or 4
Texture: silt loam
Reaction: very strongly acid or strongly acid, and the upper part ranges to neutral in limed areas
Bt horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silt loam or silty clay loam
Clay content: 24 to 32 percent
Sand content: 2 to 10 percent
Reaction: very strongly acid or strongly acid, and the upper part ranges to neutral in limed areas
2Bt horizon:
Hue: 2.5YR to 7.5YR
Value: 4 or 5
Chroma: 4 to 8
Texture: silty clay or clay
Clay content: 45 to 75 percent
Sand content: 3 to 18 percent
Individual layers: less than 51 cm (20 inches) thick, can be a clay loam and range to 40 percent sand
Reaction: is very strongly acid or strongly acid in the upper part, and ranges to slightly alkaline in the lower part.
Rock fragment content: 0 to 14 percent chert gravel and cobbles, includes a few limestone flagstones, stones or boulders
COMPETING SERIES: These are the Crider, Hootentown, Peridge, Ryker, Stinesville, and Winnipeg series. All these competing soils are more permeable in the lower part of the series control section.
GEOGRAPHIC SETTING: Navilleton soils are on summits, shoulders and back slopes of hills and sinkholes underlain with limestone of Mississippian Age. Slopes are 2 to 12 percent. They formed in 51 to 102 cm (20 to 40 inches) of loess and the underlying paleosol in clayey residuum. Mean annual temperature ranges from 11 to 14 degrees C (52 to 57 degrees F), and mean annual precipitation ranges from 102 to 117 cm (40 to 46 inches). Frost free days range from 170 to 200; elevation ranges from 152 to 274 meters (500 to 900 feet).
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bedford, Crider, Knobcreek, and Haggatt soils. The moderately well drained Bedford soils are on summits. The well drained, more permeable Crider soils are on similar landform positions. The well drained Knobcreek and Haggatt soils are on shoulders and back slopes.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained. Saturated hydraulic conductivity is moderately high or high (4.23 to 14.11 micrometers/s) in the upper part of the solum and moderately low or moderately high (0.42 to 1.41 micrometers/s) in the lower part. Permeability is moderate in the upper part of the solum and slow in the lower part. The potential for surface water runoff is medium or high.
USE AND VEGETATION: These soils are typically used to grow crops. Principal crops are corn, soybeans, winter wheat, and grasses and legumes for hay and pasture. A few areas are in forest. Native vegetation is mixed deciduous hardwood forest.
DISTRIBUTION AND EXTENT: South central Indiana. This series is of small extent in MLRA 122.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Floyd County, Indiana, 2000.
REMARKS: This soil was included with Crider soils in the 1974 Clark and Floyd Counties, Indiana soil survey, and is identified in the updating of Floyd County. Some data shows the family particle-size class to be contrasting (fine-silty over clayey), but as of 03/2006 this soil is considered dominantly to be in the fine-silty class.
Diagnostic horizons and features recognized in this pedon are:
1) Ochric epipedon: 0 to 20 cm or 0 to 8 inches (Ap horizon)
2) Argillic horizon: 20 to 183 cm or 8 to 72 inches (Bt and 2Bt horizons)
3) Lithic contact: 183 to 203 cm or 72 to 80 inches
ADDITIONAL DATA: Data for the typical pedon S97IN-043-5 and a similar pedon S97IN-043-2 is available at the NSSL in Lincoln, NE.