LOCATION FOLLET                  TX

Established Series
GWC-LCB-RM
08/2025

FOLLET SERIES

Depth class: Very deep
Drainage class: Very poorly drained
Flooding frequency and duration: Very frequent, very long
Saturated hydraulic conductivity: Low to moderately low
Parent material: Fine-silty estuarine deposits
Slope: 0 to 1 percent
Mean annual air temperature: 21 degrees C (70 degrees F)
Mean annual precipitation: 1067 millimeters (42 inches)

TAXONOMIC CLASS: Fine-silty, mixed, active, nonacid, hyperthermic Sodic Endoaquents

TYPICAL PEDON: Follet clay loam on a smooth, level slope in grass at nearly sea level. (Colors are for moist soil unless otherwise stated.)

Ag--0 to 10 centimeters; gray (10YR 5/1) clay loam; massive; very friable, slightly fluid, slightly sticky and slightly plastic; common fine and medium roots; common fine vesicular pores; strongly saline; slightly alkaline (pH 7.6); clear smooth boundary. (10 to 38 centimeters thick)

Cg1--10 to 56 centimeters; gray (10YR 6/1) loam stratified silty clay loam; massive; firm, nonfluid, slightly sticky and slightly plastic; few fine roots; few fine tubular pores; common fine prominent brownish yellow (10YR 6/6) and common fine distinct brown (10YR 5/3) iron concentrations; strongly saline; moderately alkaline (pH 8.2); gradual smooth boundary.

Cg2--56 to 122 centimeters; gray (10YR 6/1) loam stratified silty clay loam; massive; firm, nonfluid, slightly sticky and slightly plastic; common fine prominent brownish yellow (10YR 6/6) and common fine distinct brown (10YR 5/3) iron concentrations; strongly saline; moderately alkaline (pH 8.2); gradual smooth boundary.

Cg3--122 to 200 centimeters; gray (10YR 6/1) silty clay loam stratified with silt loam; massive; firm, nonfluid, slightly sticky and slightly plastic; common fine distinct brown (10YR 5/3) and common fine distinct yellowish brown (10YR 5/4) iron concentrations; strongly saline; moderately alkaline (pH 8.2).

TYPE LOCATION:
Brazoria County, Texas; approximately 6.1 kilometers (3.8 miles) west of San Luis Pass and Bluewater Highway, approximately 1.6 kilometers (1 mile) west-southwest of Christmas Point, and just south of Bastrop Bay; USGS quadrangle: Christmas Point, TX

Latitude: 29.0758333
Longitude: -95.1875000
Datum: WGS84
Coordinate Source: Hand-held GPS

RANGE IN CHARACTERISTICS:
Depth to bedrock: Greater than 200 centimeters
Moisture regime: Water is at, near, or over the soil surface throughout the year
Moisture regime: Peraquic
Reaction throughout: Neutral to moderately alkaline (6.6 to 8.4)
Electrical conductivity throughout: 20 to 60 dS/meter
Exchangeable sodium percent: 15 or greater
Particle-size control section (weighted average):
Clay content-18 to 27 percent
Sand content-39 to 50 percent

In some pedons the surface layer has a slightly fluid horizon, but it does not extend to a depth of 50 centimeters.
Some pedons have a peaty or mucky surface 5 to 20 centimeters thick.
Some pedons have 2C horizons below 152 centimeters (60 inches) that have the same color range as the A and C horizons, but individual strata are reddish, brownish or yellowish.

Ag horizon:
Hue-N or 10YR
Value-3 to 7
Chroma-3 or less
Texture-loamy fine sand, fine sandy loam, loam, clay loam
Redox concentrations-0 to 20 percent
Redox depletions-0 to 20 percent

Cg horizon:
Hue-N or 10YR
Value-4 to 8
Chroma-2 or less
Texture-loam, sandy clay loam, silty clay loam, or clay loam (most pedons are stratified)
Redox concentrations-0 to 20 percent
Redox depletions-0 to 20 percent
Iron-manganese concentrations (masses or nodules)-0 to 20 percent

COMPETING SERIES: There are no competing series in the same family. Other similar soils are the Barbary, Barrada, Gentilly, Karankawa, Levy, Scatlake, Tatlum, Tracosa, and Veston series.
Barbary, Barrada, Gentilly, Levy, Scatlake, and Tatlum soils: have n-values of more than 0.7 between 20 and 51 cm of the soil surface.
Karankawa soils: have a coarse-loamy particle-size control section.
Tracosa soils: have a fine particle-size control section.
Veston soils: do not have a peraquic moisture regime.

GEOGRAPHIC SETTING:
Parent material: Fine-silty estuarine deposits
Landscape: Barrier islands and coastal plain
Landform: Back-barrier marshes and tidal marshes
Slope: 0 to 1 percent
Mean annual air temperature: 20 to 23 degrees C (68 to 74 degrees F)
Mean annual precipitation: 812 to 1194 millimeters (32 to 47 inches)
Frost-free period: 330 to 365 days
Elevation: Less than 1.5 meters (5 feet)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Amarada, Harris, and Galveston soils.
Amarada soils: have subaqueous drainage, hydrogen sulfide odors and/or peroxide reactions and often have higher fluidity.
Harris soils: are slightly higher on the landscape, have finer textures with slickensides, and are not as wet.
Galveston soils: are slightly higher on the landscape and have sandy textures throughout.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Very poorly drained
Saturated hydraulic conductivity: Low or moderately low
Flooding frequency and duration: Frequent, very long
Seasonal water table: 0 to 30 centimeters above the surface during high tides
Surface runoff: Negligible

USE AND VEGETATION:
Major uses: Wildlife land and livestock grazing areas.
Native vegetation: Smooth cordgrass, glassworts, and saltworts.
Ecological site: R150BY552TX-Tidal Flat

DISTRIBUTION AND EXTENT:
General area: General area: On barrier islands and mainland marshes near bays along the central coast of Texas
Land Resource Region: T-Atlantic and Gulf Coast Lowland Forest and Crop Region.
MLRA(s): 150B Gulf Coast Saline Prairies
Extent: Moderate

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Special Projects Office

SERIES ESTABLISHED: Brazoria County, Texas, 1978

REMARKS:
These soils were formerly classified as a miscellaneous land type, tidal flat, or were included with the Veston series. This soil has halic properties as described by J. A. Coover et al., in SSSA Proceedings, 1975.

Classification changed from Typic Haplaquents to Sodic Endoaquents on 11/2000 based on typifying pedon description. Further study of the series is needed to verify classification.

Typical pedon taxonomic features:
Manner of failure: Slighty fluid, 0 to 10 centimeters (Ag horizon)
Ochric epipedon: 0 to 10 centimeters (Ag horizon)
Peraquic moisture regime: 0 to 200 centimeters (Ag and Cg horizons are permanently saturated)
Sodic properties: SAR above 13 (Ag and Cg horizons)
Taxonomic Version: Keys to Soil Taxonomy, 13th Edition (2022)

ADDITIONAL DATA:
NSSL data from Brazoria County, TX (S78TX-039-094)
OSD User Pedon ID: S1978TX039094
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National Cooperative Soil Survey
U.S.A.