LOCATION RANACKER MOEstablished Series
TAXONOMIC CLASS: Clayey-skeletal, mixed, superactive, mesic Lithic Argiudolls
TYPICAL PEDON: Ranacker flaggy silty clay loam - on a 13 percent east-facing slope in pasture. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 4 inches; very dark grayish brown (10YR 3/2) flaggy silty clay loam, grayish brown (10YR 5/2) dry; moderate fine granular structure; firm; common fine roots; 15 percent limestone flagstones; neutral; clear smooth boundary.
A--4 to 9 inches; very dark grayish brown (10YR 3/2) flaggy silty clay loam, grayish brown (10YR 5/2) dry; moderate fine subangular blocky structure; firm; common fine roots; 20 percent limestone flagstones; neutral; clear wavy boundary. (Combined thickness of the A horizon is 4 to 10 inches.)
Bt--9 to 18 inches; reddish brown (5YR 4/4) very flaggy silty clay; moderate fine subangular blocky structure; firm; few very fine roots; many distinct clay films on faces of peds; 30 percent limestone flagstones and 25 percent cherty gravel; neutral; clear wavy boundary. (4 to 15 inches thick)
R--18 inches; limestone.
TYPE LOCATION: Pike County, Missouri; about 5780 feet north and 650 feet east of the junction of Highway OO and county road number 186 west of Eolia, Missouri, in the northwest part of survey 1727, T. 52 N., R 2 W., UTM coordinates 43445649m N and 665628m E, zone 15.
RANGE IN CHARACTERISTICS: The thickness of the solum ranges from 12 to 20 inches and commonly is the same as depth to a lithic contact with limestone. Thickness of the mollic epipedon is 4 to 12 inches. Coarse fragments average 35 percent or more in the series control section. Reaction ranges from moderately acid to slightly alkaline.
The A horizon has color value of 2 or 3, 4 or 5 dry and chroma of 1 to 3.
The Bt horizon has hue of 5YR to 10YR, value of 3 to 5, and chroma of 2 to 4. Texture is the very flaggy analogues of silty clay loam or silty clay.
COMPETING SERIES: There are no competing series. A similar series is Gasconade which does not have an argillic horizon.
GEOGRAPHIC SETTING: Ranacker soils are on uplands and formed in residuum from limestone. Slope gradients are 9 to 14 percent. Mean annual temperature ranges from 52 to 57 degrees F, and mean annual precipitation ranges from 34 to 40 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bucklick, Crider, Gatewood, Gasconade, Goss, Keswick, and Winfield soils. All of these soils except Gasconade are deeper to bedrock and commonly are at higher elevations in the landscape. Gasconade soils are on similar landscape positions.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is rapid. Permeability is moderately slow.
USE AND VEGETATION: These soils are used mainly for pasture. Native vegetation is prairie grass and scattered trees.
DISTRIBUTION AND EXTENT: Throughout the mesic area of Missouri. The Ranacker soils are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana
SERIES ESTABLISHED: Pike County, Missouri, 1992.
REMARKS: Previously, these soils have been included with the Gasconade series which are commonly more than 12 inches deep to bedrock. Diagnostic horizons and features recognized in this series are: mollic epipedon - the zone from the surface of the soil to a depth of 9 inches (Ap and A horizons); argillic horizon - the zone from approximately 9 to 18 inches (Bt horizon) - lithic contact with limestone at 18 inches.