LOCATION GIST                    TX+LA

Established Series
CLN-JKW-JAD
07/2014

GIST SERIES


The Gist series consists of very deep, moderately well drained soils formed in loamy fluviomarine deposits of the Beaumont Formation of late Pleistocene age. Slope ranges from 1 to 5 percent. Mean annual temperature is about 19.5 degrees C (67 degrees F), and mean annual precipitation is about 1422 mm (56 in).

TAXONOMIC CLASS: Coarse-silty, siliceous, semiactive, thermic Oxyaquic Glossudalfs

TYPICAL PEDON: Gist very fine sandy loam-in an area of Evadale-Gist complex, 0 to 1 percent slopes in forest. (Colors are for moist soil unless otherwise stated.)

A--0 to 10 cm, (0 to 4 in); 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) organic stains with diffuse and clear boundaries in the matrix; strongly acid; clear wavy boundary. (8 to 15 cm [3 to 6 in] thick)

E--10 to 41 cm, (4 to 16 in); 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. (15 to 69 cm [6 to 27 in] thick)

Bt/E1--41 to 64 cm, (16 to 25 in); yellowish brown (10YR 5/4) loam (Bt); about 20 percent of the horizon is albic material 2.5 to 5 cm (1 to 2 in) 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); 2 percent medium distinct brownish yellow (10YR 6/8) masses of iron accumulation with clear and sharp boundaries in matrix; 1 percent fine faint light gray (10YR 7/2) iron depletions with diffuse and clear boundaries in lower part; strongly acid; diffuse smooth boundary.

Bt/E2--64 to 104 cm, (25 to 41 in); yellowish brown (10YR 5/4) loam (Bt); about 20 percent of the horizon is albic material 2.5 to 5 cm (1 to 2 in) 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; 2 percent medium distinct brownish yellow (10YR 6/8) masses of iron accumulation with clear and sharp boundaries in matrix; 5 percent medium distinct gray (10YR 6/1) iron depletions with diffuse and clear boundaries in matrix; very strongly acid; clear irregular boundary. (combined thickness of the Bt/E horizons is 15 to 92 cm [6 to 36 in])

Bt/E3--104 to 132 cm, (41 to 52 in); gray (10YR 5/1) clay loam; about 15 percent of the horizon is albic material 1 to 2.5 cm (0.5 to 1 in) 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); 5 percent medium distinct brownish yellow (10YR 6/8) masses of iron accumulation with clear and sharp boundaries in matrix; 2 percent medium prominent red (2.5YR 4/6) masses of iron accumulation with clear and sharp boundaries in matrix; very strongly acid; clear irregular boundary. (15 to 74 cm [6 to 29 in] thick)

Btg--132 to 203 cm, (52 to 80 in); 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; 12 percent medium prominent red (2.5YR 4/6) and 2 percent 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 ft north in forest on mound. Latitude: 30, 21, 53 N; Longitude: 94, 02, 01 W; Evadale topographic quadrangle; NAD 83.

RANGE IN CHARACTERISTICS:
Soil Moisture: An udic soil moisture regime. The soil moisture control section is 20 to 60 cm (8 to 24 in) below the soil surface, which remains moist in some or all parts from more than 90 cumulative days in normal years.
Mean annual soil temperature: 20.6 to 21.7 degrees C (69 to 71 degrees F)
Depth to glossic horizon: 23 to 74 cm (9 to 29 in)
Depth to episaturation: 51 to 91 cm (20 to 36 in)

Particle-size control section (weighted average)
Clay content: 6 to 16 percent

A horizon
Hue: 10YR
Value: 4 or 5
Chroma: 2
Texture: very fine sandy loam, loam, or silt loam.
Reaction: extremely acid to moderately acid

E horizon
Hue: 10YR
Value: 5 to 7
Chroma: 2 to 4
Texture: very fine sandy loam, loam, or silt loam.
Reaction: extremely acid to moderately acid

Bt/E horizon
(Bt part)
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 4 to 6
(E part)
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 3 or 4
Texture: very sandy loam, loam, or silt loam
Clay content: 10 to 15 percent
Redox concentrations: amount-2 to 8 percent; color-shades of yellow or brown
Redox depletions: amount-0 to 8 percent; color-shades of gray
Brittle material: 0 to 25 percent
Reaction: extremely acid to strongly acid.

Bt horizon
Hue: 10YR
Value: 5 or 6
Chroma: 1 or 2
Texture: loam, silt loam, clay loam, silty clay loam, silty clay, or clay
Redox concentration: amount-5 to 20 percent; color-shades of red, yellow, or brown
Redox depletion: amount-0 to 5 percent; color- shades of gray
Glossic material: amount-0 to 5 percent; texture-very fine sandy loam or silt loam
Reaction: very strongly acid to neutral

Btg horizon
Hue: 10YR or 2.5Y
Value: 5 to 7
Chroma: 1 or 2
Texture: clay loam, silty clay loam, silty clay, or clay
Redox concentration: amount-5 to 20 percent; color-shades of red, yellow, or brown
Redox depletion: amount-0 to 5 percent; color- shades of gray
Glossic material: amount-0 to 5 percent; texture-very fine sandy loam or silt loam
Reaction: very strongly acid to neutral

COMPETING SERIES: This includes the Messer (LA) series. Similar soils are the Grace (MI), Hillcity (MN), Keltys (TX), Laska (TX), Texla (TX), and Timpson (TX) series.
Messer soils: are not clayey in the lower argillic horizon
Grace soils: have mixed mineralogy; semiactive CEC to clay class
Hillcity soils: have mixed mineralogy; frigid soil temperature egime
Keltys: semiactive CEC/clay class; solum thickness is 102 to 152 (40 to 60 in) from surface
Laska soils: have more than 15 percent sands larger than very fine sand
Texla soils: have more than 18 percent clay in the particle-sized control section
Timpson soils: semiactive CEC to clay class

GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits derived from the Beaumont Formation of late Pleistocene age
Landscape: flat Coastal Plain
Landform: flats
Microfeature: pimple mounds 61 to 183 cm (2 to 6 ft) high and 15 to 23 m (50 to 75 ft) across
Slope: 1 to 5 percent (slope based on measurement from top of mound to base of mound)
Mean annual precipitation range: 1219 to 1651 mm (48 to 65 in)
Precipitation Pattern: Precipitation is fairly uniform throughout the year with slight peaks in the spring and fall months.
Mean annual air temperature range: 19.5 to 20.6 degrees C (67 to 69 degrees F.)
Frost-free period: 240 to 300 days
Elevation: 3 to 30.5 m (10 to 100 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Acadia (LA), Caddo (LA), Camptown(TX), Evadale (TX), Glenmora (LA), Kinder (LA), Texla (TX), and the tentative Vidor (T-TX) series.
Acadia soils: have more than 35 percent clay in the particle-size control section; somewhat poorly drained; on side slopes of Pleistocene age terraces
Caddo: have more than 18 percent clay in the particle-size control section; have aquic conditions
Camptown soils: have aquic conditions; in relict meanderbelt channels
Evadale and Kinder soils: have aquic conditions; on flats
Glenmora soils: have more than 18 percent clay in the particle-size control section; on broad stream divides
Texla soils: have more than 18 percent clay in the particle-size control section; on oval to oblong pimple mounds
Vidor soils: have exchangeable sodium percentages greater than 15; on flats

DRAINAGE AND PERMEABILITY: moderately well drained. Runoff is low. Permeability is moderate in the upper part and very slow in the lower argillic horizon. These soils are saturated within the glossic horizon for more than 30 days during winter and early spring months. Endosaturation occurs in the lower part of the argillic horizon during the winter and early spring months. Redoximorphic features are formed during abnormally wet periods.

USE AND VEGETATION: Used mainly for woodland and native pasture. Most areas are in pine and hardwood, mainly loblolly pine, water oak, and sweetgum. The understory vegetation is mainly yaupon and American beautyberry with andropogon, paspalum, and panicum species. A few areas have been cleared and used for improved pastures of bahiagrass and bermudagrass.

DISTRIBUTION AND EXTENT: Southeast Texas and southwestern Louisiana; Land Resource Region T; MLRA 152B (Western Gulf Coast Flatwoods). The series is of moderate extent.

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

SERIES ESTABLISHED: Jasper County, Texas; 1980.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon-0 to 41 cm (0 to 16 in) (A and E horizons)
Argillic horizon-41 to 203 cm (16 to 80 in) (Bt/E1, Bt/E2, Bt and Btg horizons)
Glossic horizon-41 to 132 cm (16 to 52 in) (Bt/E1, Bt/E2, and Bt/E3 horizons)

Additional Comments: The assignment of the cation-exchange activity class is inferred from lab data on soils with similar characteristics.

ADDITIONAL DATA: Engineering test data exists on pedon S77TX-241-003 from the type location. KSSL data available on pedon S12TX2911022 (lab pedon number 12N8317)

Taxonomic Version: Keys to Soil Taxonomy, Eleventh Edition, 2010


National Cooperative Soil Survey
U.S.A.