LOCATION JUMBILECOVE TX

Tentative Series
SAK-JKW-AS
07/2024

JUMBILECOVE SERIES

The Jumbilecove series consists of very deep, poorly drained, high saturated hydraulic conductivity (rapidly permeable) soils that formed in eolian deposits. These nearly level soils occur on vegetated tidal flats on barrier islands. Slope is less than 1 percent. Mean annual precipitation is about 1245 mm (49 in) and mean annual air temperature is about 20 degrees C (68 degrees F).

TAXONOMIC CLASS: Mixed, hyperthermic Sodic Psammaquents

TYPICAL PEDON: Jumbilecove fine sand, on vegetated tidal flat; 0.2 m elevation (Colors are for moist soil unless otherwise stated.)

A--0 to 16 cm (0 to 6 in); black (2.5Y 2/1) fine sand; single grain; loose, nonsticky, nonplastic; nonfluid; few very fine roots throughout; few very fine tubular pores; 1 percent medium faint gray (2.5Y 5/1) iron depletions with clear boundaries in matrix and 1 percent fine prominent dark yellowish brown (10YR 4/6) masses of oxidized iron with clear boundaries lining pores; 2 percent medium shell fragments; electrical conductivity of 25.0 dS/m by ec meter; neutral; clear smooth boundary. (13 to 33 cm [5 to 13 in] thick)

C--16 to 52 cm (6 to 21 in); gray (2.5Y 5/1) fine sand; single grain; loose, nonsticky, nonplastic; nonfluid; common very fine roots throughout; few very fine tubular pores; 1 percent medium prominent dark yellowish brown (10YR 4/6) masses of oxidized iron with clear boundaries lining pores and 1 percent medium prominent brownish yellow (10YR 6/6) masses of oxidized iron with clear boundaries in matrix and 1 percent medium distinct greenish gray (5GY 5/1) masses of reduced iron with clear boundaries in matrix surrounding redox concentrations; 1 percent fine shell fragments; electrical conductivity of 20.0 dS/m; neutral; clear smooth boundary.

Cg1--52 to 97 cm (21 to 38 in); greenish gray (10GY 5/1) fine sand; single grain; loose, nonsticky, nonplastic; nonfluid; few very fine roots throughout; 1 percent fine prominent greenish gray (10GY 6/1) masses of reduced iron with clear boundaries in matrix and 1 percent medium prominent dark yellowish brown (10YR 4/6) masses of oxidized iron with clear boundaries in matrix and 2 percent fine prominent dark gray (2.5Y 4/1) masses of reduced iron with clear boundaries lining pores; 1 percent very fine shell fragments; electrical conductivity of 14.0 dS/m by ec meter; neutral; gradual smooth boundary.

Cg2--97 to 145 cm (38 to 57 in); gray (N 5/), fine sand; single grain; loose, nonsticky, nonplastic; nonfluid; 2 percent medium prominent light olive brown (2.5Y 5/4) masses of oxidized iron with clear boundaries lining pores and 2 percent medium prominent light olive brown (2.5Y 5/6)masses of oxidized iron with clear boundaries lining pores; 1 percent very fine shell fragments; electrical conductivity of 28.0 dS/m by ec meter; neutral; gradual smooth boundary.

Cg3--145 to 203 cm (57 to 80 in); dark greenish gray (10Y 4/1) fine sand; single grain; loose, moderately sticky, moderately plastic; nonfluid; 4 percent organic stains; 2 percent medium prominent olive yellow (2.5Y 6/6) masses of oxidized iron with clear boundaries in matrix and 2 percent medium prominent greenish gray (10GY 6/1) masses of reduced iron with clear boundaries in matrix; 1 percent very fine shell fragments; electrical conductivity of 19.0 dS/m by ec; neutral.

TYPE LOCATION:
Galveston County, TX; from the intersection of Ostermeyer Road and 9-Mile Road on Galveston Island, about 0.5 mile north on Ostermeyer; located about 2000 feet northwest in vegetated tidal marsh.

USGS topographic quadrangle: Lake Como, TX
Latitude: 29 degrees 14 minutes 50.48 seconds north
Longitude: 94 degrees 54 minutes 46.19 seconds west
Datum: WGS84
UTM Zone: 15
UTM Easting: 314526 meters
UTM Northing: 3237602 meters

RANGE IN CHARACTERISTICS:

Soil moisture: A peraquic soil moisture regime.

Particle-size control section (weighted average):
Total clay content: 3 to 8 percent

A horizon:
Hue: 10YR to 5Y
Value: 3 to 7
Chroma: 1 to 3
Texture: fine sand or loamy fine sand
Redox concentrations: amount-0 to 2 percent; color-shades of brown or yellow
Reduced iron concentrations: amount-0 to 10 percent; shades of gray
Reaction (pH): neutral to moderately alkaline (6.6 to 8.4)

C layer:
Hue: 10YR to 5Y
Value: 5 or 6
Chroma: 1 or 2
Texture: fine sand or loamy fine sand
Redox concentrations: amount-0 to 20 percent; color-shades of brown or yellow
Redox depletions: amount-0 to 5 percent; color-shades of gray
Reduced iron concentrations: amount- 0 to 5 percent; shades of gray, green or blue
Shell fragments: amount-0 to 2 percent; size- 2 to 75 mm
Reaction (pH): neutral to moderately alkaline (6.6 to 8.4)

Cg horizon:
Hue: N, 10Y, 5GY, 10GY, or 5B
Value: 4 to 6
Chroma: up to 1
Texture: fine sand or loamy fine sand
Redox concentrations: amount-0 to 30 percent; color-shades of brown, yellow
Reduced iron concentrations: amount- 0 to 15; shades of gray, green or blue
Shell fragments: amount-0 to 10 percent; size- 2 to 75 mm
Reaction (pH): neutral to moderately alkaline (6.6 to 8.4)

COMPETING SERIES:
These are the Brazosport, Noria and the tentative Mentzel series in the same family. Similar soils are Madre, Mustang, Satatton, and Tatton series.
Brazosport soils: in an aquic moisture regime; somewhat poorly drained
Noria soils: very poorly drained
Mentzel soils: more saline
Madre, Satatton, and Tatton soils: siliceous mineralogy
Mustang soils: have SAR values less than 13

GEOGRAPHIC SETTING:
Parent material: eolian sands derived from igneous, metamorphic, and sedimentary rock
Landscape: barrier island
Landform: tidal flats
Slope: less than 1 percent
Precipitation Pattern: Precipitation is generally uniform throughout the year with slight peaks in the spring and fall months
Mean annual precipitation: 1143 to 1295 mm (45 to 51 in)
Mean annual air temperature: 20.6 to 21.7 C (69 to 71 degrees F)
Frost-free period: 275 to 300 days
Elevation: 0 to 0.5 m (0 to 20 in)

GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Drumbay, Galveston, Karankawa and the tentative Mentzel series.
Drumbay soils: on back-barrier flat landform; are not sodic
Galveston soils: on a back-barrier flat landform; are not sodic
Karankawa soils: on a lower position on the tidal flat; are loamy throughout; have vegetation
Mentzel soils; similar landform; do not have vegetation

DRAINAGE AND PERMEABILITY:
Drainage class: poor
Permeability class: rapid (high saturated hydraulic conductivity)
Runoff: high
Flooding: very frequently from daily tides, for very brief (4 to 48 hours) duration
Seasonal water table: Endosaturation occurs from near the surface to 2 m (0 to 8 feet) throughout the year. As high tides recede, these areas remain saturated throughout.

USE AND VEGETATION:
Major uses: wildlife habitat
Native vegetation: Salicornia, distichlis, gulf cordgrass, borrichia

DISTRIBUTION AND EXTENT:
General area: The upper Texas Gulf Coast mostly on Galveston Island
Land Resource Region: Atlantic and Gulf Coast Lowland Forest and Crop Region(T)
MLRA 150B - Gulf Coast Saline Prairies
Extent: small

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Temple, Texas

SERIES PROPOSED: Galveston County, Texas, 2020. The name is from a cove near the type location.

REMARKS: The series was formerly included in the Mustang series. The series was separated based on differences in water table depth, salinity, and vegetation.

Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: 25 to 100 cm (10 to 40 in)
Ochric epipedon: 0 to 16 cm (0 to 6 in) (A horizon)
Endosaturation and aquic conditions: 0 to 203 cm (0 to 80 in) (A, C, Cg1, Cg2, and Cg3 horizons)

Additional Comments: Mineralogy based on the amount of sand size shell fragments.

ADDITIONAL DATA: MLRA soil survey office lab data from the type location on pedon S2021TX1679113.

TAXONOMIC VERSION: Keys to Soil Taxonomy, Twelfth Edition, 2014.

National Cooperative Soil Survey
U.S.A.