LOCATION GLENMORA                LA

Established Series
Rev. JLD-JJD-RM
02/2018

GLENMORA SERIES

The Glenmora series consists of very deep, moderately well drained, slowly permeable soils that formed in loamy fluviomarine deposits of Pleistocene age. These nearly level to gently sloping soils occur on high terraces of river valleys on coastal plains. Slope ranges from 1 to 5 percent. Mean annual precipitation is about 1473 mm (58 in), and mean annual air temperature is about 19.5 degrees C (67 degrees F).

TAXONOMIC CLASS: Fine-silty, siliceous, active, thermic Glossaquic Paleudalfs

TYPICAL PEDON: Glenmora silt loam; elevation is 30.5 m (100 ft) (Colors are for moist soil unless otherwise stated.)

A--0 to 15 cm (0 to 6 in); dark grayish brown (10YR 4/2) silt loam; weak fine granular structure; friable; common fine roots; few fine pores; 2 percent fine distinct black 10YR 2/1) iron-manganese masses; very strongly acid; clear irregular boundary. (10 to 18 cm [4 to 7 in] thick)

E--15 to 25 cm (6 to 10 in); pale brown (10YR 6/3) silt loam; weak coarse subangular blocky structure; friable; common fine roots; few fine pores; 2 percent fine brown (10YR 4/3) iron-manganese masses; very strongly acid, pH 4.8; clear broken boundary. (7 to 15 cm [3 to 6 in] thick)

BE--25 to 36 cm (10 to 14 in); yellowish brown (10YR 5/6) silt loam; weak medium subangular blocky structure; friable; few fine roots; common medium pores coated with silt; 2 percent medium distinct light brownish gray (10YR 6/2) iron depletions and 2 percent fine brown (10YR 4/3) iron-manganese masses; very strongly acid; gradual wavy boundary. (8 to 18 cm [3 to 7 in] thick)

Bt--36 to 64 cm (14 to 25 in); 50 percent yellowish brown (10YR 5/4) and 45 percent pale brown (10YR 6/3) silt loam; moderate fine and medium subangular blocky structure; firm; few fine roots; few fine pores; 10 percent distinct silt coats that are 5 mm thick on all faces of peds and 15 percent distinct clay films on all faces of peds; 1 percent medium prominent yellowish red (5YR 5/8) masses of oxidized iron and 4 percent medium brown (10YR 4/3) iron-manganese concretions; very strongly acid; few medium yellowish brown (10YR 5/6) brittle peds ; very strongly acid; abrupt irregular boundary. (15 to 41 cm [6 to 16 in] thick)

Btv/E--64 to 81 cm (25 to 32 in); light brownish gray (10YR 6/2) silty clay loam (Bt); moderate fine subangular blocky structure, and moderate coarse subangular blocky structure; firm; few fine roots between peds; few fine pores; 5 percent clay films on all faces of peds; brittle in brown and red areas; light brownish gray (10YR 6/2) coatings of silt around primary peds make up 15 percent of horizon (E) ;3 percent fine red (2.5YR 4/6) plinthite nodules and 4 percent medium brown (10YR 4/3) iron-manganese concretions and 25 percent coarse prominent red (10R 4/8) masses of oxidized iron; very strongly acid; gradual wavy boundary. (17 to 46 cm [7 to 18 in] thick)

Btv--81 to 127 cm (32 to 50 in); gray (10YR 6/1) silty clay loam; moderate coarse subangular blocky structure; firm; few fine roots between peds; few fine pores; 10 percent faint clay films on all faces of peds; brittle in brown and red areas; 3 percent medium plinthite nodules and 25 percent medium prominent yellowish brown (10YR 5/6) masses of oxidized iron and 25 percent medium prominent red (2.5YR 4/8) masses of oxidized iron; very strongly acid; gradual wavy boundary. (36 to 124 cm [14 to 49 in] thick)

B't--127 to 203 cm (50 to 80 in); 40 percent yellowish brown (10YR 5/8) and 30 percent red (2.5YR 4/8) silty clay loam; moderate coarse subangular blocky structure; firm; 5 percent silt coats on vertical faces of peds and 15 percent distinct clay films on all faces of peds; 30 percent coarse prominent gray (10YR 6/1) iron depletions; moderately acid.

TYPE LOCATION: Evangeline Parish, LA; about 5 miles west of Pine Prairie at top of slope; 15 yards north of road bank. USGS topographic quadrangle: Pine Prairie; Latitude: 30 degrees, 47 minutes, 25 seconds N; Longitude: 92 degrees, 29 minutes, 51.2 seconds W; SW1/4 sec. 17, T. 3 S., R. 1 W; Datum: WGS84.

RANGE IN CHARACTERISTICS:
Soil Moisture: An udic soil moisture regime. The soil moisture control section is moist in some or all parts for more than 275 days in normal years.
Mean annual soil temperature: 20.6 to 21.7 degrees C (69 to 71 degrees F)
Depth to redox depletions: 76 cm (30 in) from the surface
Solum thickness: 152 to 254 cm (60 to 100 in)
Particle-size control section (weighted average)
Clay content: 25 to 35 percent
Weatherable minerals: 5 percent in coarse silt fraction

A Horizon:
Hue: 10YR
Value: 4 or 5
Chroma: 2 or 3
Texture: silt loam or very fine sandy loam
Reaction: very strongly acid to moderately acid (4.5 to 6.0)

E Horizon:
Hue: 10YR
Value: 5 or 6
Chroma: 2 or 3
Texture: silt loam or very fine sandy loam
Reaction: very strongly acid to moderately acid (4.5 to 6.0)

BE and Bt Horizon:
Hue: 7.5YR or 10YR
Value: 5 or 6
Chroma: 3 to 6
Texture: silt loam, or silty clay loam
Clay content: 8 to 35 percent
Redox concentrations: amount-few or common, shades-brown or red
Redox depletions: amount-none to common, shades-gray
Reaction: very strongly acid to moderately acid (4.5 to 6.0)

Btv/E Horizon:
Hue: 7.5YR or 10YR (E makes up from 5 to 15 percent of the horizon)
Value: 5 or 6
Chroma: 2 to 6
Texture: silt loam, or silty clay loam
Clay content: 18 to 35 percent
Redox concentrations: amount-few to many, shades-yellow, brown, or red
Redox depletions: amount-few or common, shades-gray
Reaction: very strongly acid to moderately acid (4.5 to 6.0)

Btv and B't Horizons:
Hue: 5YR to 10YR
Value: 4 to 6
Chroma: 1 to 8
Texture: silt loam, silty clay loam, silty clay or clay
Clay content: 20 to 45 percent
Redox concentrations: amount-few to many, shades-yellow, brown, or red (amount of red redox is many and size is coarse)
Redox depletions: amount-few or common, shades-gray
Plinthite nodules: 0 to 5 percent
Brittleness: less than 30 percent of area.
Reaction: very strongly acid to moderately acid (4.5 to 6.0)

COMPETING SERIES: These include the Abita and Kolin series in the same family. Similar soils are the Beauregard, Duralde, Evangeline, Falkner, Frizzell, Messer, and Muskogee series.
Abita soils: do not have an argillic horizon above the B/E horizon
Kolin soils: have a clayey 2B horizon within a depth of 51 to 102 cm (20 to 40 in).
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 76 cm (30 in) of the profile.

GEOGRAPHIC SETTING:
Parent material: loamy fluviomarine deposits derived from igneous, metamorphic and sedimentary rock of Pleistocene age
Landscape: river valleys on coastal plains
Landform: terraces
Slope: 1 to 5 percent
Mean annual precipitation: 1448 to 1549 mm (57 to 61 in)
Precipitation Pattern: Precipitation is fairly uniform throughout the year.
Mean annual air temperature: 18.3 to 19.5 degrees C (65 to 67 degrees F)
Frost-free period: 240 to 270 days
Elevation: 15 to 61 m (49 to 200 ft)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Caddo, Messer, and Muskogee 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.
Muskogee soils: are on a similar landform

DRAINAGE AND PERMEABILITY: Moderately well drained. Permeability is slow. Runoff is medium.
Apparent seasonal high water table at depths of 61 to 91 cm (2 to 3 ft), 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.LRR-T MLRA-152B Western Gulf Coast Flatwoods); some areas are in MLRA 133B. Series is of large extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas

SERIES ESTABLISHED: Evangeline Parish, Louisiana; 1970.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon: 0 to 25 cm (0 to 10 in) (A, E horizons)

Albic horizon: 15 to 25 cm (6 to 10 in) (E) 64 to 81 cm (25 to 32 in) (E' part of B/E' horizon)

Argillic horizon: 36 to 203 cm (14 to 80 in) (Bt,Bvt/E,Btv,B't horizons)

Glossic feature: 64 to 81 cm (25 to 32 in) (Btv/E horizon)

Plinthite: 64 to 127 cm (32 to 50 in) (Btv/E and Btv horizon)

Aquic conditions: 64 to 81 cm (25 to 32 in) (Btv/E horizon)

Taxonomic Version: Keys to Soil Taxonomy, Twelfth Edition, 2014.

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National Cooperative Soil Survey
U.S.A.