LOCATION ELYSIAN OK+LA TXEstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, active, thermic Haplic Glossudalfs
TYPICAL PEDON: Elysian fine sandy loam - forested
(Colors are for moist soil unless otherwise stated.)
A--0 to 6 inches; dark grayish brown (10YR 4/2) fine sandy loam; weak fine granular structure; very friable; medium acid; clear smooth boundary. (2 to 6 inches thick)
BA--6 to 29 inches; strong brown (7.5YR 5/6) fine sandy loam; weak fine granular structure; very friable; medium acid; clear wavy boundary. (12 to 28 inches thick)
Bt1/E--29 to 44 inches; strong brown (7.5YR 5/6) loam (Bt1); few fine faint yellowish brown mottles; weak medium subangular blocky structure; friable; about 20 percent of horizon is pale brown (10YR 6/3) tongues of fine sandy loam 1 to 3 cm. wide extending through horizon and becoming light gray (10YR 7/2) below 40 inches (E); few pockets of clean sand grains; 20 to 30 percent yellowish red (5YR 5/6) peds that are brittle when moist; patchy clay films on faces of peds; few fine dark concretions; very strongly acid; gradual wavy boundary. (10 to 28 inches thick)
Bt2/E--44 to 72 inches; mottled strong brown (7.5YR 5/6) and yellowish brown (10YR 5/4) loam (Bt2); weak medium subangular blocky structure; firm; about 10 percent of horizon is light gray (10YR 7/2) interfingering of fine sandy loam 3 to 15 mm. wide (E); common pockets of clean sand grains; 5 percent yellowish red (5YR 5/6) peds that are brittle when moist; nearly continuous clay films on faces of peds and within pores; very strongly acid.
TYPE LOCATION: McCurtain County, Oklahoma; about 2-1/2 miles south of Tom, Oklahoma; about 2,600 feet west and 200 feet south of the northeast corner, sec. 10, T. 10 S., R. 26 E.
RANGE IN CHARACTERISTICS: Solum thickness is more than 60 inches. The A horizon has hue of 7.5YR, 10YR, or 2.5Y, value of 4 to 6, and chroma of 2 to 4. Texture is very fine sandy loam or fine sandy loam. Reaction ranges from slightly acid to very strongly acid. The BA horizon has hue of 7.5YR, 10YR, or 2.5Y, value of 4 to 6, and chroma of 2 to 6. Texture is very fine sandy loam or fine sandy loam. Reaction ranges from slightly acid to very strongly acid.
The Bt part of the Bt/E horizons have hue of 7.5YR or 10YR, value of 4 to 6, and chroma of 4 to 8 with grayish, brownish, or reddish mottles. Clay content of the Bt/E horizons ranges from 10 to 18 percent. The E part of the Bt1/E horizon makes up about 15 to 30 percent by volume and occurs as tongues. The E part of the Bt2/E horizon makes up about 5 to 15 percent by volume and occurs as interfingers. The E part has hue of 10YR, value of 5 to 7, and chroma of 1 to 3. The E part is less clayey than the Bt part. About 5 to 50 percent of the Bt/E horizons are brittle when moist or dry. Brittle parts in the Bt part of the Bt/E horizons have hue of 5YR or 7.5YR, value of 5, and chroma of 6 to 8. The Bt/E horizons range from medium acid to very strongly acid. Some pedons have a few siliceous pebbles in the Bt1/E horizon.
COMPETING SERIES: There are no other series in this family.
GEOGRAPHIC SETTING: These are nearly level to gently sloping soils on terraces and occur as circular or oblong mounds, 2 to 5 feet high and 40 to 100 feet in diameter in the Western Coastal Plains (MLRA 133B). The top of the mound is very gently sloping, and the side slope is very gently sloping or gently sloping. The regolith is loamy sediments of Cretaceous age. The climate is humid. Mean annual temperature ranges from 57 to 65 degrees F. Average annual precipitation ranges from 40 to 50 inches. Thornthwaite annual P-E Index ranges from 64 to 84.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Guyton and Wrightsville soils which are in lower elevations between the mounds. The control section of the Guyton soils is fine-silty. Wrightsville soils have a fine control section.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff is slow or medium. Permeability is moderate. The depth to a perched water table is about 36 to 72 inches for brief periods during December through May.
USE AND VEGETATION: Principal use is woodland. Small areas have been leveled and are used for soybeans or tame pasture. Forest vegetation is shortleaf pine, loblolly pine, red oak, and sweetgum.
DISTRIBUTION AND EXTENT: In the Western Coastal Plains (MLRA 133B) of Arkansas, Louisiana, Oklahoma, and Texas. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: McCurtain County, Oklahoma; 1970.
REMARKS: These soils were formerly included as mound phases of the associated soils.
Diagnostic horizons and features in this pedon are:
Ochric epipedon - zone from the surface to about 6 inches. (A horizon)
Argillic horizon - zone from 29 to 72 inches. (Bt parts of Bt1/E, Bt2/E horizons)
Haplic Glossudalfs features - Soils that have an udic moisture regime; have an ochric epipedon; have an argillic horizon and have base saturation of 35 percent or more 50 inches below the upper boundary of the argillic horizon; and have tongues of E material extending only throughout the upper 15 inches of the Bt horizon.
Soil Interpretation Record: OK0098 Elysian Series