LOCATION GLENMORA LAEstablished Series
TAXONOMIC CLASS: Fine-silty, siliceous, active, thermic Glossaquic Paleudalfs
TYPICAL PEDON: Glenmora silt loam--forested. (Colors are for more soil unless othewise stated.)
A--0 to 6 inches; dark grayish brown (10YR 4/2) silt loam; weak fine granular structure; friable; common fine roots; few fine pores; common fine soft black bodies; very strongly acid; clear irregular boundary. (4 to 7 inches thick)
E--6 to 10 inches; pale brown (10YR 6/3) silt loam; weak coarse subangular blocky structure; friable; common fine roots; common fine pores; common soft brown bodies; very strongly acid; clear broken boundary. (0 to 6 inches thick)
BE--10 to 14 inches; yellowish brown (10YR 5/6) silt loam; common medium distinct light brownish gray (10YR 6/2) mottles; weak medium subangular blocky structure; friable; few fine roots; common medium pores coated with silt; common fine soft brown bodies; very strongly acid; gradual wavy boundary. (4 to 6 inches thick)
Bt1--14 to 25 inches; mottled yellowish brown (10YR 5/4) and pale brown (10YR 6/3) silt loam; few medium prominent yellowish red (5YR 4/8) mottles; moderate medium subangular blocky structure parting to moderate fine subangular blocky ; firm; few medium yellowish brown brittle peds; few fine roots; few fine pores; common distinct clay films on faces of peds; coatings of silt as thick as 5 mm surround most peds; common medium brown concretions; very strongly acid; abrupt irregular boundary. (6 to 16 inches thick)
B/E'--25 to 32 inches; light brownish gray (10YR 6/2) silty clay loam (Bt); many medium prominent red (10R 4/8) mottles; moderate coarse subangular blocky structure parting to moderate fine subangular blocky; firm; common brittle red bodies; few fine roots along surfaces of peds; few fine pores; few faint clay films on faces of peds; light brownish gray (10YR 6/2) coatings of silt around primary peds make up 15 percent of horizon (E); common fine brown concertions; very strongly acid; gradual wavy boundary. (4 to 8 inches thick)
Btv--32 to 50 inches; gray (10YR 6/1) silty clay loam; many medium distinct yellowish brown (10YR 5/6) and prominent yellowish red (5YR 4/8) mottles; moderate coarse subangular blocky structure; firm; brittle in brown and red areas; few fine roots along surfaces of peds; few fine pores; few faint lay films on faces of peds; about 3 percent plinthite; very strongly acid; gradual wavy boundary. (15 to 46 inches thick)
Bt2--50 to 80 inches; mottled yellowish brown (10YR 5/8) and yellowish red (5YR 4/8) silty clay loam; many medium prominent gray (10YR 6/1) mottles; moderate coarse subangular blocky structure; firm; common distinct clay films on surfaces of peds; coatings of silt on vertical surfaces of peds; medium acid.
TYPE LOCATION: Evangeline Parish, Louisiana; 5 miles west of Pine Prairie at top of slope, 15 yards north of road bank, SW1/4 sec. 17, T. 3 S., R. 1 W.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 60 to 100 inches. On the basis of laboratory data about 5 percent weatherable minerals are in the coarse silt fraction. The solum ranges from very strongly acid to medium acid. Grayish mottles caused by wetness are within 30 inches of the surface.
The A horizon has hue of 10YR, value of 4 or 5, and chroma of 2 or 3. Texture is silt loam or very fine sandy loam.
The E horizon has hue of 10YR, value of 5 or 6, and chroma of 2 or 3. Texture is silt loam or very fine sandy loam.
The BE and Bt1 horizons have hue of 10YR or 7.5YR, value of 5 or 6, and chroma of 3 to 6. Mottles are in shades of gray, grayish brown, or red. Texture is silt loam or silty clay loam with 18 to 32 percent clay. The Bt part of the B/E' horizon has the same range in color and texture as the Bt1 horizon, or it has value of 6 and chroma of 2. Some pedons have a discontinuous E' horizon of gray or light brownish gray silt loam. Albic material (E) makes up from 5 to 15 percent of the B/E horizon.
The Btv and Bt2 horizons are mottled in hue of 10YR, 7.5YR, or 5YR, value of 4 to 6, and chroma of 1 to 8. Brittleness occurs in less than 30 percent of the area. Plinthite is less than 5 percent of the area.
COMPETING SERIES: These include the Keithville and Kolin series in the same family and the Beauregard, Duralde, Evangeline, Falkner, Frizzell, Messer, and Muskogee series. Keithville and Kolin soils have a clayey 2B horizon within a depth of 20 to 40 inches. Beauregard soils have a B horizon that has less than 35 percent base saturation and more than 5 percent plinthite. Duralde, Evangeline, and Muskogee soils have 15 to 25 percent weatherable minerals. In addition, Duralde and Evangeline soils have less than 10 percent sand in the solum. Falkner soils have clayey lower horizons. Frizzell and Messer soils have a thick BE horizon and have less than 18 percent clay in the control section. In addition, Messer soils do not have gray mottles in the upper 30 inches of the profile.
GEOGRAPHIC SETTING: Glenmora soils are on very gently sloping to gently sloping broad stream divides of the mid-Pleistocene terraces. They have formed in mixed fluvial sediment. Slopes range from 1 to 5 percent. The climate is warm and humid. Mean annual temperature ranges from about 60 to 70 degrees F. Average annual rainfall ranges from about 45 to 60 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Messer and Muskogee series, and the Caddo series. Caddo soils are gray throughout and are on higher and more level topography. Messer soils have a thick silt loam BE horizon and are on associated pimple mounds.
DRAINAGE AND PERMEABILITY: Moderately well drained; medium runoff; slow permeability. Apparent seasonal high water table at depths of 2 to 3 feet, December through April.
USE AND VEGETATION: Most of the Glenmora soils are in woodland. Some areas have been cleared and planted to rice and soybeans. Native vegetation was longleaf pine with and understory of bluestem grasses.
DISTRIBUTION AND EXTENT: Flatwoods of Louisiana and possibly Arkansas, Oklahoma, and Texas. The series is of moderate extent.
MLRA OFFICE RESPONSIBLE: Temple, Texas
Series Estabished: Evangeline Parish, Louisiana; 1970.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon..................0 to 10 inches (A,E)
Albic horizon......................6 to 10 inches (E) 25 to 32 inches (E' part of B/E')
Argillic horizon...14 to 80 inches (Bt1,B/E',Btv,Bt2)
Glossic feature.......................25 to 32 (B/E')
Plinthite.......................32 to 50 inches (Btv)
Aquic moisture regime