Soil Survey of Tarrant County, Texas Page: 101
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Tarrant County, Texas
coarse prominent red (10OR 5/8) and few medium
distinct yellow (10YR 7/6) mottles; weak medium
prismatic structure; very hard, firm; few fine roots;
common thin clay films and pockets of uncoated
sand on faces of peds; strongly acid.
The solum ranges from 60 to 80 inches or more in
thickness. The clay content within the control section is
20 to 35 percent.
The Al horizon is pale brown or light yellowish brown,
and the A2 horizon is very pale brown or light yellowish
brown. The combined thickness of the Al and A2
horizons is 20 to 30 inches. Reaction is slightly acid or
neutral.
The B2t horizon is light gray, reddish yellow, brownish
yellow, or yellowish brown sandy clay loam or clay loam
mottled in shades of brown, yellow, red, or gray.
Reaction is strongly acid or medium acid.
Ovan series
The Ovan series consists of moderately well drained,
deep, clayey soils on bottom lands. These soils formed
in clayey sediment on flood plains. Slope is less than 1
percent.
Typical pedon of Ovan clay, occasionally flooded; from
the intersection of Southwest Loop 820 and Vickery
Boulevard in the city of Fort Worth, this pedon is 2.42
miles northeast on Vickery Boulevard and 200 feet north,
in Ed Collett Park:
A1-0 to 15 inches; dark grayish brown (10YR 4/2) clay,
very dark grayish brown (10OYR 3/2) moist; moderate
fine and medium blocky structure; very hard, very
firm, very sticky and plastic; common fine and
medium roots; many wormcasts; few fine pebbles of
limestone; calcareous; moderately alkaline; clear
wavy boundary.
A12-15 to 21 inches; dark grayish brown (10YR 4/2)
clay, very dark grayish brown (10YR 3/2) moist;
moderate fine and medium blocky structure;
extremely hard, very firm, very sticky and plastic;
common fine roots; few wormcasts; many pressure
faces; calcareous; moderately alkaline; gradual wavy
boundary.
A13-21 to 42 inches; dark grayish brown (10YR 4/2)
clay, very dark grayish brown (10YR 3/2) moist;
moderate coarse angular blocky structure; extremely
hard, very firm, very sticky and plastic; few fine
roots; few fine concretions of calcium carbonate;
many pressure faces; common intersecting
slickensides below a depth of 25 inches; calcareous;
moderately alkaline; diffuse wavy boundary.
A14-42 to 60 inches; dark grayish brown (10YR 4/2)
clay, very dark grayish brown (10YR 3/2) moist;
common fine faint brown mottles; moderate coarse
angular blocky structure; extremely hard, very firm,
very sticky and plastic; few fine roots; common fineconcretions of calcium carbonate; many pressure
faces; many intersecting slickensides; calcareous;
moderately alkaline; diffuse wavy boundary.
C-60 to 72 inches; brown (10YR 5/3) clay, brown
(10YR 4/3) moist; moderate coarse angular blocky
structure; extremely hard, very firm, very sticky and
plastic; few fine roots; common concretions of
calcium carbonate; many pressure faces; many
intersecting slickensides; calcareous; moderately
alkaline.
The solum ranges from 60 to more than 80 inches in
thickness. When the soil is dry, cracks 1 inch to 3 inches
wide extend from the surface to a depth of more than 25
inches. Intersecting slickensides are between a depth of
20 and 30 inches. The soil is calcareous and moderately
alkaline throughout.
The A horizon is very dark grayish brown, dark grayish
brown, brown, or grayish brown.
The B horizon, where present, is dark grayish brown,
grayish brown, brown, or light brownish gray clay or silty
clay. Some pedons have brownish mottles.
Ponder series
The Ponder series consists of moderately well drained,
deep, loamy soils on uplands. These soils formed in
calcareous, marine sediment. Slope ranges from 0 to 3
percent.
Typical pedon of Ponder clay loam, 1 to 3 percent
slopes; from the intersection of Southwest Loop 820 and
Old Granbury Road in the city of Fort Worth, this pedon
is 3.8 miles south on Old Granbury Road; 0.9 mile east
on West Cleburne Road, and 70 feet south:
Ap-0 to 7 inches; dark grayish brown (10YR 4/2) clay
loam, very dark grayish brown (10YR 3/2) moist;
massive when dry, weak fine and medium
subangular blocky structure when moist; extremely
hard, firm, sticky and plastic; few fine roots; few fine
black and brown concretions; slightly acid; abrupt
wavy boundary.
B21t-7 to 17 inches; brown (10YR 5/3) clay, brown
(10YR 4/3) moist; weak coarse blocky structure
parting to moderate fine blocky; extremely hard, very
firm, very sticky and plastic; few fine roots; common
pressure faces; patchy clay films; common filled
vertical cracks; few fine black concretions; neutral;
gradual wavy boundary.
B22t-17 to 47 inches; grayish brown (10YR 5/2) clay,
dark grayish brown (10YR 4/2) moist; weak coarse
blocky structure parting to moderate medium blocky;
extremely hard, very firm, very sticky and plastic;
few fine roots; common pressure faces and small
slickensides; common clay films; few fine hard pitted
concretions of calcium carbonate; few fine black and
brown concretions; common filled vertical cracks;
mildly alkaline; gradual wavy boundary.101
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General Soil Map, Tarrant County, Texas (Map)
Map displays soil types along with creeks, towns, schools, churches, power transmission lines, oil and gas pipelines, roads, and railroads. Includes legend and symbols. Scale 1:253,440.
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Ressel, Dennis D.; Allen, Milton; Coffee, Daniel R.; Hill, Ralph H.; Holt, Thomas H.; Pauls, Edward W. et al. Soil Survey of Tarrant County, Texas, book, 1981; Washington D.C.. (https://texashistory.unt.edu/ark:/67531/metapth130249/m1/113/?q=san+saba: accessed June 14, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.