LOCATION BASTROPBAY TX

Established Series
JKW-SAK-KBH-AKS
10/2024

BASTROPBAY SERIES

Depth Class--Very deep
Drainage Class--Subaqueous drainage
Saturated Hydraulic Conductivity--High to very high
Parent Material--Sandy lagoonal deposits
Geomorphic Location--Flood-tidal delta flats / slopes
Slope range for Series--0 to 1 percent
Mean Annual Air Temperature--20.6 degrees C. (69 degrees F.)
Mean Annual Precipitation--1295 millimeters (51 inches)

TAXONOMIC CLASS: Mixed, hyperthermic Typic Psammowassents

TYPICAL PEDON: Bastropbay loamy fine sand, in 8 cm (3 in) saline water. (Colors are taken from freshly opened core interiors unless otherwise stated.)

Ag--0 to 46 cm (0 to 18 in); gray (5Y 5/1) loamy fine sand; nonsticky, nonplastic; nonfluid; few very fine roots throughout; 1 percent shell fragments; electrical conductivity of 19.0 dS/m; moderately alkaline; gradual boundary.

Cg1--46 to 92 cm (18 to 36 in); 70% gray (5Y 5/1) and 30% black (N 2.5/) loamy fine sand; nonsticky, nonplastic; nonfluid; 1 percent shell fragments; electrical conductivity of 28.0 dS/m; moderately alkaline; gradual boundary.

Cg2--92 to 151 cm (36 to 59 in); 50% gray (5Y 5/1) and 50% black (N 2.5/) fine sand; nonsticky, nonplastic; nonfluid; 2 percent shell fragments; electrical conductivity of 24.0 dS/m; moderately alkaline; gradual boundary.

Cg3--151 to 203 cm (59 to 80 in); 70% black (N 2.5/) and 30% gray (5Y 5/1) fine sand; nonsticky, nonplastic; nonfluid; 2 percent shell fragments; electrical conductivity of 30.0 dS/m; moderately alkaline.

TYPE LOCATION:
Brazoria County, TX; approximately 3,122 feet northwest from the San Luis Pass County Park boat ramp, east of Mud and south of Bird Island, and approximately 2,550 feet north-northwest of the northern most end of Anchor Drive on San Luis Island; USGS topographic quadrangle: Christmas Point, TX

Latitude--29.0856361
Longitude-- -95.1364472
Datum--WGS84
Coordinate source--from hand-held GPS

RANGE IN CHARACTERISTICS:
Depth to bedrock--greater than 200 centimeters
Soil Moisture--These soils are continuously inundated
Water depth--Ranges from 8 to 180 centimeters (3 to 71 inches)
Reaction throughout--slightly to moderately alkaline (7.4 to 8.4)
Electrical conductivity throughout--5 to 40 dS/m
Particle-size control section (weighted average)--Sand content throughout: 85 to 97 percent; total clay content: 3 to 13 percent

Ag horizon:
(some pedons have a thin Oa horizon)
Hue: N, 5Y to 10Y
Value: 3 to 5
Chroma: 1 or 2
Texture: loamy fine sand or fine sand or the mucky counterparts
Total clay content: 3 to 11 percent
Shell fragments: amount-0 to 3 percent; size-2 to 20 mm
Effervescence to hydrogen peroxide: none to moderate

Cg layer:
Hue: N, 5Y to 10Y, or 5GY
Value: 2.5 to 6
Chroma: 1
Texture: loamy fine sand or fine sand
Total clay content: 3 to 14 percent
Redox concentrations: amount-0 to 5 percent; shades of yellow, brown, or olive
Iron-manganese concentrations: amount-0 to 3 percent
Masses of reduced iron: amount-0 to 10 percent; shades of blue or green
Shell fragments: amount-0 to 5 percent; size-2 to 20 mm
Effervescence to hydrogen peroxide: none or very slight

COMPETING SERIES:
These are no series in the same family.
Similar soils are the Demas, Indian River, Mantoloking, Massapog, Nagunt, Rhodesfolly, and Trappe series.Demas, Mantoloking, and Trappe soils--have siliceous mineralogy; mesic soil temperature regime; sulfidic materials
Indian River soils--have siliceous mineralogy; mesic soil temperature regime; and are very close equivalents to Bastropbay
Massapog and Rhodesfolly soils--have mesic soil temperature regime and buried former soil surface horizons
Nagunt soils--have mesic soil temperature regime; sulfidic materials, and buried former soil surface horizons

GEOGRAPHIC SETTING:
Parent material--Sandy lagoonal deposits
Landscape--Coastal estuaries and lagoons
Landform--Active and current flood-tidal delta flats and slopes
Slope--Less than 1 percent
Precipitation Pattern--rainfall is mostly uniform throughout the year but most of the annual rainfall occurs during the Spring, Summer, and Fall months
Mean annual precipitation--1219 to 1295 mm (48 to 51 inches)
Mean annual air temperature--20.6 to 21.7 degrees C. (69 to 71 degrees F.)
Water temperature range (seasonal range)--15 to 32 degrees C. (59 to 90 degrees F.)
Water depth range--8 to 180 centimeters (3 to 71 inches)
Water Regime--Tidal, 0 to 0.3 m (0 to 1 ft)
Water salinity range--25 to 35 ppt
Frost-free period--365 days

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Harris, Tatlum, Tracosa, and Westbay series.
Harris and Tracosa soils--have clayey and are firm throughout; and are on landforms not permanently submersed
Tatlum soils--have colors throughout that are browner; and areon landforms that are not permanently submersed
Westbay soils--are on nearby washover fan landforms and contain sulfidic soil materials

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--Subaqueous
Saturated Hydraulic Conductivity--High to very high
Soil Moisture Regime-Peraquic
Soil is continuously inundated by saline water. Some small areas can be exposed during lower tides as intertidal sand flats.

USE AND VEGETATION:
Major uses--These areas are used as wildlife habitat and for recreational activities.
Native vegetation--Some areas have widgeon grass or are bare sand.

DISTRIBUTION AND EXTENT:
General area--These soils are located on the upper Texas Gulf Coast
Land Resource Region--T- Atlantic and Gulf Coast Lowland Forest and Crop Region
MLRA--150B - Gulf Coast Saline Prairies
Extent--Small

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: SPECIAL PROJECTS OFFICE

SERIES PROPOSED: Brazoria County, Texas, 2021. The name is coined from Bastrop Bay.

REMARKS: The series was formerly included with water.

Diagnostic horizons and features recognized in this pedon are--
Particle-size control section--0 to 100 cm (0 to 40 in)
Ochric epipedon--0 to 46 cm (0 to 18 in) (Ag horizon)
Peraquic feature--0 to 203 cm (0 to 80 in) (Ag horizon and Cg layers are permanently saturated)

Additional Comments--Mineralogy based on data from adjacent subaerial barrier island soils and the content of shell fragments that make up the sand portion.

ADDITIONAL DATA: Soil survey office lab data on pedon S2021TX0399124 from series type location.

TAXONOMIC VERSION: Keys to Soil Taxonomy, Thirteenth Edition, 2022

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National Cooperative Soil Survey
U.S.A.