LOCATION GIST TXEstablished Series
TAXONOMIC CLASS: Coarse-silty, siliceous, superactive, thermic Oxyaquic Glossudalfs
TYPICAL PEDON: Gist very fine sandy loam--forest.
(Colors are for moist soil unless otherwise stated.)
A--0 to 4 inches; dark grayish brown (10YR 4/2) very fine sandy loam; weak fine granular structure; soft, very friable, slightly sticky and nonplastic; many fine and medium roots; few coarse roots; many medium faint dark grayish brown (10YR 4/2) iron depletions and stains with diffuse and clear boundaries in the matrix; strongly acid; clear wavy boundary. (3 to 7 inches thick)
E--4 to 16 inches; light yellowish brown (10YR 6/4) very fine sandy loam; weak medium subangular blocky structure parting to weak fine granular; soft, very friable, slightly sticky and nonplastic; common fine and medium roots; few coarse roots; strongly acid; diffuse irregular boundary. (3 to 14 inches thick)
Bt/E1--16 to 25 inches; yellowish brown (10YR 5/4) loam (B2t); about 20 percent of the horizon is albic material 1 to 2 inches wide that extend through the horizon of very pale brown (10YR 7/4) (E); weak fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few fine medium and coarse roots; few faint clay films on surfaces of peds (Bt); few fine faint light gray (10YR 7/2) iron depletions with diffuse and clear boundaries in lower part; strongly acid; diffuse smooth boundary. (5 to 20 inches thick)
Bt/E2--25 to 41 inches; yellowish brown (10YR 5/4) loam (B2t); about 20 percent of the horizon is albic material 1 to 2 inches wide that extend through the horizon of very pale brown (10YR 7/4) (E); weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine medium roots; few faint clay films on surfaces of peds (Bt); about 10 percent of the Bt part is brittle; few medium distinct brownish yellow (10YR 6/8) masses of iron accumulation with clear and sharp boundaries in matrix; common medium distinct gray (10YR 6/1) iron depletions with diffuse and clear boundaries in matrix; very strongly acid; clear irregular boundary. (10 to 20 inches thick)
Bt/E3--41 to 52 inches; gray (10YR 5/1) clay loam; about 15 percent of the horizon is albic material 0.5 to 1 inch wide of light gray (10YR 7/2) very fine sandy loam (E); moderate subangular blocky structure; hard, firm, sticky and plastic; few faint clay films on surfaces of peds (Bt); few medium prominent red (2.5YR 4/6) masses of iron accumulation with clear and sharp boundaries in matrix; very strongly acid; clear irregular boundary. (5 to 15 inches thick)
Bt--52 to 80 inches; gray (10YR 5/1) clay; moderate medium blocky structure; hard, very firm, sticky and plastic; common faint clay films on surfaces of peds; very fine sandy loam albic material (E) make up 2 percent of horizon; common medium prominent red (2.5YR 4/6) and few medium prominent strong brown (7.5YR 5/6) masses of iron accumulation with clear and sharp boundaries in matrix; very strongly acid.
TYPE LOCATION: Jasper County, Texas; from the intersection of U. S. Highway 96 and Farm Road 2246 at Evadale; 1.0 mile east on Farm Road 2246; 1.9 miles northeast and east on county road (about 0.15 east of Ten Mile Creek); 180 feet north in forest on mound. (Latitude 30N, 21, 53; Longitude 94W, 02, 01)
RANGE IN CHARACTERISTICS: Solum thickness is more than 80 inches.
Texture of the A and E horizons is very fine sandy loam, loam, or silt loam. The A horizon has hue of 10YR, value of 4 and 5, and chroma of 2. Reaction ranges from extremely acid to moderately acid.
The E horizon has hue of 10YR, value of 5 to 7, and chroma of 2 to 4. Reaction ranges from extremely acid to moderately acid.
The Bt/E1 and Bt/E2 horizons have textures of loam or silt loam with clay content less than 18 percent and with less than 15 percent coarser than very fine sand. Color is hue of 7.5YR and 10YR, value of 5 or 6, and chroma 4 to 6. The albic material (E) have hue of 10YR, value of 6 or 7, and chroma of 2 to 4. Redoximorphic features (iron depletions and Accumulations) range from few to common in shades of gray, yellow, and brown. In some pedons the lower part of this horizon has up to 25 percent brittleness. Reaction ranges from extremely acid to strongly acid.
The lower Bt horizons have textures of clay loam, silty clay, or clay. Color is hue of 10YR, value of 5 or 6, and chroma of 1 or 2. Masses of iron accumulation are in shades of red, brown, and yellow. The upper part of these horizons have very fine sandy loam or silt loam albic material that is light gray in color. The volume of albic material diminishes with depth. In some pedons, at depths greater than 70 inches, reaction ranges to neutral.
COMPETING SERIES: There are no competing series. Similar soils are the Alazan, Elysian, Fred, Glenmore, Hicota, Messer, Metcalf, Pooleville, Rodessa, Texla, Tippo, and Wanilla series. Alazan soils have fine-loamy particle-size control sections. Elysian and Messer soils have albic material penetrating less than 20 inches into the Bt horizons. In addition, Elysian soils have coarse-loamy particle-size control sections. Fred, Glenmora, Metcalf, Poolville and Texla soils have fine-silty particle-size control sections. In addition, Glenmora soils lack albic material in the Bt horizon. Hicota, Moten, and Wanilla soils have coarse-loamy particle-size control sections. Rodessa soils have clayey control sections. Tippo soils are silt or silt loam throughout and are subject to overflow.
GEOGRAPHIC SETTING: These soils are on nearly level to gently sloping uplands. The soils formed in loamy and clayey sediments of the Beaumont formation of Pleistocene age. A typical landscape position is circular to linear mounds 50 to 200 feet in diameter and 1 to 3 feet above the intermound landscape. Slopes are less than 2 percent and are mainly convex. The soils formed in unconsolidated sediments that have been modified by wind. Mean annual precipitation ranges from 45 to 55 inches. Mean annual temperature ranges from 65 degrees to 70 degrees F. Frost-free days range from 210 to 240. Elevation ranges from 15 to 100 feet. Thornthwaite P-E index ranges 80 to 84.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Evadale, Texla, and Waller series. Evadale and Waller soils are poorly drained, have chroma of 2 or less throughout the Bt horizon, and occupy the lower intermound positions. Texla soils have a fine-silty particle-size control section, are somewhat poorly drained, and are on the intermound landscape position. Evadale and Texla soils are mapped in a complex with Gist soils.
DRAINAGE AND PERMEABILITY: Gist soils are moderately well drained. Permeability is very slowly. Runoff is low. These soils are saturated from 24 to 48 inches below the soil surface for long periods of time but are not reduced in most years.
USE AND VEGETATION: Mainly used for woodland with the main species being loblolly and slash pine. Some areas have been cleared and are used for improved pasture, with bahiagrass and bermudagrass being the main pasture plants
DISTRIBUTION AND EXTENT: Eastern Texas and Louisiana in the Flatwoods (MLRA 152B). The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Jasper County, Texas; 1980.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 16 inches (A and E horizons)
Argillic horizon - 16 to 80 inches (Bt/E1, Bt/E2, Bt/E3 and Bt horizons)
Glossic horizon - 16 to 52 inches (Bt/E1, Bt/E2 and Bt/E2 horizons)
Oxyaquic feature - This soil is saturated for long periods of time or more, but are not reduced in most years.
SOIL INTERPRETATION RECORD NUMBER: TX0808