LOCATION BAYUCOS TXEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, calcareous, hyperthermic Typic Fluvaquents
TYPICAL PEDON: Bayucos fine sandy loam - idle.
(Colors are for moist soil unless otherwise
stated.)
C1g-- 0-6 inches, gray (10YR 6/1) fine sandy loam; common,
medium, faint, light yellowish brown mottles; massive; friable;
slightly sticky; common medium roots; many fine and medium pores;
few thin strata of loam; saline; calcareous; moderately alkaline;
clear smooth boundary. (3 to 12 inches thick)
C2g-- 6-14 inches, gray (10YR 5/1) loam; common, medium,
faint, light yellowish brown mottles; massive; friable, sticky;
common fine roots; many medium pores; few thin strata of very fine
sandy loam; saline; calcareous; moderately alkaline; gradual
smooth boundary. (5 to 20 inches thick)
C3g-- 14-27 inches, light brownish gray (10YR 6/2) loam;
few, medium, faint, pink mottles; massive; friable, sticky; common
fine roots; many medium pores; few small shells; saline;
calcareous; moderately alkaline; gradual smooth boundary. (7 to
20 inches thick)
C4g-- 27-45 inches, gray (10YR 6/1) loam; few, fine faint,
light brownish gray mottles; massive; friable, sticky; few fine
roots; few thin strata of very fine sandy loam; saline;
calcareous; moderately alkaline; gradual smooth boundary. (0 to
20 inches thick)
C5g-- 45-60 inches, gray (10YR 6/1) loam; common, medium,
distinct yellowish brown (10YR 5/4) mottles; massive; friable,
sticky; thin strata of fine sandy loam; few small shells; saline;
calcareous; moderately alkaline.
TYPE LOCATION: Calhoun County, Texas; 2.6 miles south of Port
O'Connor on Bayucos Island; 700 feet north of Saluria Bayou and
260 feet east of Mitchell Cut.
RANGE IN CHARACTERISTICS: The 10- to 40-inch control section
averages between 18 and 30 percent clay. Texture is loam, clay
loam, silty clay loam, fine sandy loam, or silt loam. Strata of
very fine sandy loam, loamy fine sand, silt, sandy clay loam, or
silty clay are in most pedons. Colors are light gray (10YR 7/1,
7/2; 2.5Y 7/2; 5Y 7/1, 7/2), gray (10YR 6/1, 5/1; 5Y 6/1, 5/1; N
5/ , N 6/ ), dark gray (10YR 4/1; N 4/ ), light brownish gray
(10YR 6/2; 2.5Y 6/2) pinkish gray (7.5YR 6/2), light olive gray
(5Y 6/2), light greenish gray (5GY 7/1; 5G 7/1), or greenish gray
(5GY 6/1; 5G 6/1). Brownish or pinkish mottles range from few to
common in most pedons. In places, the thin sandy strata are
brownish, pinkish, or olive in color. The N value is less than
.7. Salinity, as expressed in mmhos/cm., ranges from 20 to 50.
COMPETING SERIES: These include the
Angelina, Barrada, Hialeah, Ijam, and Veston series. Angelina
soils have soil temperatures of less than 72 degrees F. In
addition, Angelina soils are acid. Barrada and Ijam soils have
more than 35 percent clay in the control section. Hialeah soils
have carbonatic mineralogy. Veston soils have a fine-silty
control section.
GEOGRAPHIC SETTING: Bayucos soils are nearly level, occurring near sea level on islands along the Texas Gulf Coast. The soils are not covered
by daily tides, but are frequently covered by high tides. The
soil formed in saline loamy sediments of recent deposits.
Sediments have been reworked and sorted by wave action and by
wind. The climate is humid subtropical. Annual precipitation
ranges from 30 to 45 inches. Average annual temperature ranges
from 70 degrees to 73 degrees F. Thornthwaite P-E index ranges
from 40 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dianola and Mustang
series. Dianola and Mustang soils have less than 10 percent clay
in the control section.
DRAINAGE AND PERMEABILITY: Very poorly drained; very slow runoff
to ponded; moderate permeability. The water table is within 20
inches of the surface at all times and the soil is moist to the
surface continuously. Extremely high tides cover the soils
frequently.
USE AND VEGETATION: Used for wildlife. Vegetation consists of a
sparse stand of matrimony vine, pickleweed, rushes, sedges, and a
few clumps of marshhay cordgrass and smooth cordgrass.
DISTRIBUTION AND EXTENT: On islands in the bays along the central
part of the Gulf Coast of Texas. The series is of minor extent,
comprising about 5,000 acres.
SERIES ESTABLISHED: Calhoun County, Texas; 1972.
REMARKS: The soils probably would have been classified in the
Half-Bog soil group. They have been mapped as the Marsh land type
in the past.
ADDITIONAL DATA: Lincoln Laboratory samples 70L761-70L762
indicating mixed mineralogy. These soils are within the range of
@halic@ chemical properties described in the proposed changes in
Soil Taxonomy by Coover, et. al., and would be included in the
Halaquents great soil group pending approval.