LOCATION KLEINPETER LA

Established Series
DCJ, JDS
02/2013

KLEINPETER SERIES

The Kleinpeter series consists of very deep, moderately well drained, moderately permeable soils that formed in Peorian age loess deposits 4 to 10 feet thick over Pleistocene age terrace deposits. They are on salt domes. Slopes range from 0 to 30 percent.

TAXONOMIC CLASS: Fine-silty, mixed, active, hyperthermic Oxyaquic Glossudalfs

TYPICAL PEDON: Kleinpeter silt in an area of Klienpeter silt, 1 to 5 percent slopes, in hardwoods. (Colors are for moist soil.)

Ap--0 to 4 inches; very dark grayish brown (10YR 3/2) silt; weak fine and medium granular structure; very friable; many fine roots throughout; strongly acid; clear smooth boundary. (2 to 8 inches thick)

E--4 to 11 inches; brown (10YR 5/3) silt loam; weak fine and medium granular structure; friable; many fine and medium roots throughout; common fine low continuity vesicular pores; 3 percent intrusions of material from the A horizon; 3 percent faint clay films on surfaces along pores; 1 percent fine worm casts lining pores; very strongly acid; clear smooth boundary. (0 to 7 inches thick)

Bt/E1--11 to 25 inches; 70 percent strong brown (7.5YR 5/6) silty clay loam interior (Bt) and 30 percent pale brown (10YR 6/3) silt exterior (E); weak medium subangular blocky structure; friable; few fine roots throughout; common fine and medium high continuity dendritic tubular pores; 10 percent brittle peds; 5 percent faint brown (10YR 5/3) clay films on surfaces along pores and 5 percent faint brown (7.5YR 4/4) clay films on faces of peds; 2 percent fine prominent dendritic light brownish gray (10YR 6/2) iron depletions lining pores; 3 percent fine and medium prominent irregular very dark grayish brown (10YR 3/2) and dark brown (10YR 3/3) iron-manganese masses on faces of peds; very strongly acid; diffuse wavy boundary.

Bt/E2--25 to 32 inches; 70 percent strong brown (7.5YR 5/6) silty clay loam interior (Bt) and 30 percent pale brown (10YR 6/3) silt exterior (E); weak medium subangular blocky structure; friable; few fine roots throughout; common fine and medium high continuity dendritic tubular pores; 5 percent faint brown (10YR 5/3) clay films on surfaces along pores and 15 percent faint brown (7.5YR 4/4) clay films on faces of peds; 2 percent fine prominent dendritic light brownish gray (10YR 6/2) iron depletions lining pores; 3 percent fine and medium prominent irregular very dark grayish brown (10YR 3/2) and dark brown (10YR 3/3) iron-manganese masses on faces of peds; very strongly acid; gradual wavy boundary.

Bt/E3--32 to 40 inches; 70 percent strong brown (7.5YR 5/6) silty clay loam interior (Bt) and 30 percent pale brown (10YR 6/3) silt exterior (E); weak medium subangular blocky structure; friable; few fine roots throughout; common fine and medium high continuity dendritic tubular pores; 5 percent faint brown (10YR 5/3) clay films on surfaces along pores and 10 percent faint brown (7.5YR 4/4) clay films on faces of peds; 2 percent fine prominent dendritic light brownish gray (10YR 6/2) iron depletions lining pores; 3 percent fine and medium prominent irregular very dark grayish brown (10YR 3/2) and dark brown (10YR 3/3) iron-manganese masses on faces of peds; strongly acid; gradual wavy boundary.

Bt/E4--40 to 50 inches; 70 percent strong brown (7.5YR 5/6) silty clay loam interior (Bt) and 30 percent pale brown (10YR 6/3) silt exterior (E); weak medium subangular blocky structure; friable; few fine roots throughout; common fine and medium high continuity dendritic tubular pores; 2 percent faint brown (7.5YR 4/4) clay films on faces of peds and 5 percent faint brown (10YR 5/3) clay films on surfaces along pores; 3 percent fine and medium prominent irregular very dark grayish brown (10YR 3/2) and dark brown (10YR 3/3) iron-manganese masses on faces of peds; very strongly acid; diffuse wavy boundary.

Bt/E5--50 to 61 inches; brown (7.5YR 4/4) silty clay loam (Bt); weak medium subangular blocky structure; friable; few fine roots throughout; common fine and medium high continuity dendritic tubular pores; 2 percent faint dark brown (7.5YR 3/4) clay films on faces of peds and 5 percent faint brown (10YR 5/3) clay films on surfaces along pores and 8 percent distinct pale brown (10YR 6/3) silt coats on vertical faces of peds (E); 1 percent fine prominent dendritic very dark grayish brown (10YR 3/2) iron-manganese masses lining pores; 10 percent fine distinct irregular strong brown (7.5YR 5/6) masses of oxidized iron on faces of peds; very strongly acid; gradual wavy boundary.

Bt/E6--61 to 74 inches; brown (7.5YR 4/4) silty clay loam (Bt); weak medium prismatic parting to weak medium subangular blocky structure; friable; few fine roots throughout; common fine and medium high continuity dendritic tubular pores; 5 percent faint brown (10YR 5/3) clay films on surfaces along pores and 8 percent faint dark brown (7.5YR 3/4) clay films on faces of peds and 8 percent distinct pale brown (10YR 6/3) silt coats on vertical faces of peds (E); 1 percent fine prominent dendritic very dark grayish brown (10YR 3/2) iron-manganese masses lining pores; very strongly acid; diffuse wavy boundary.

Bt/E7--74 to 90 inches; strong brown (7.5YR 5/6) silty clay loam (Bt); weak medium prismatic parting to weak medium subangular blocky structure; friable; few fine roots throughout; common fine high continuity dendritic tubular pores; 2 percent faint brown (10YR 5/3) clay films on surfaces along pores and 8 percent distinct pale brown (10YR 6/3) silt coats on vertical faces of peds (E); 1 percent fine prominent dendritic very dark grayish brown (10YR 3/2) iron-manganese masses lining pores; very strongly acid. (Combined thickness of the Bt/E horizons range from 33 to more than 80 inches)

TYPE LOCATION: St. Mary Parish, Louisiana; located 26 miles west of Morgan City on U.S. Hgy. 90, then 11.3 miles southwest of U.S. Hgy. 90 on La. Hgy 83, then 1.6 miles south of La. Hgy. 83 on Cote Blanche Xing to ferry, then 2.67 miles south on Cote Blanche Road, then 811 yards southeast on a trail, then 50 yards due east of road; Sec. 22 T. 15 S. R. 7 E.; Latitude 29 degrees, 44 minutes, 27.00 seconds N., Longitude 91 degrees, 42 minutes, 27.51 seconds W., Marone Point Louisiana USGS 7.5 Minute Quadrangle, NAD 27.

RANGE IN CHARACTERISTICS: Solum thickness is more than 80 inches. Thickness of the loess over Pleistocene age terrace deposits (2Bt horizon) ranges from 4 to 10 feet. Reaction ranges from strongly acid through slightly acid in the A horizon, and from very strongly acid through moderately acid in the E, Bt and Bt/E horizons.

The A horizon has hue of 10YR, value of 4 or 5, and chroma of 1 to 4; or value of 3, and chroma of 2 or 3; or hue of 7.5YR, value of 4 or 5, and chroma 4; or value of 3, and chroma of 2 or 3. Texture is silt or silt loam.

The A/B horizon, where present has the same range in color in the A and B parts as the A horizon and the Bt horizon. Texture is silt loam.

The E or Bw horizon, has hue of 10YR, value of 4 or 5, and chroma of 3 or 4. Texture is silt or silt loam.

The Bt horizon, where present has hue of 7.5YR or 10YR, value of 3 through 5, and chroma of 4 through 6. Texture is silt loam or silty clay loam. Content of sand coarser than very fine sand is less than 5 percent to a depth of 48 inches or more. Iron-manganese accumulations on the faces of peds range from few to many. Skeletans range from 0 to 5 percent.

The Bt part of the Bt/E or 2Bt/E horizon has hue of 7.5YR or 10YR, value of 3 through 5, and chroma of 4 through 6. The E parts are interfingerings of albic material between peds that range from 2 to 20 mm. wide. They make up more than 15 percent of the volume in one or more subhorizons within a depth of 80 inches. These interfingerings generally extend upward from the bottom of the solum due to the flushing action of a deep, intermittently fluctuating water table. The E material has hue of 10YR, value of 5 or 6, chroma of 2 or 3. Iron or clay depletions in shades of gray and iron accumulations in shades of brown range from none to common. Texture is silt loam or silty clay loam in the Bt parts, and silt loam or silt in the E parts. Up to 5 percent calcium carbonate nodules are in some pedons.

The 2Bt or 2Bt/E horizon, where present has hue of 7.5YR or 10YR, value of 3 through 5, and chroma of 4 through 6. Iron or clay depletions in shades of gray, and iron accumulations in shades of brown range from few to common. Texture is silty clay loam, silt loam or clay loam.

COMPETING SERIES: There are no other series in the same family. Soils of the Texla series are in a closely related family. Texla soils have siliceous mineralogy and formed in loamy and clayey sediments on marine terraces.

GEOGRAPHIC SETTING: Kleinpeter soils are on salt domes. They formed in Peorian age loess deposits 4 to 10 feet thick over Pleistocene age terrace deposits. Slopes range from 0 to 30 percent. The climate is humid temperate. Average annual precipitation is 61 inches, and mean annual temperature is 68 degrees F. Elevation ranges from 7 to 50 feet above mean sea level. Frost free days range from 230 to 250.

GEOGRAPHICALLY ASSOCIATED SOILS: These are Duson and Coteau soils. Duson and Coteau soils have aquic conditions in the upper 10 inches of the subsoil and do not have a glossic horizon. In addition, Duson soils have a loess cap that is 30 to 60 inches thick, and have a perched water table above the discontinuity.

DRAINAGE AND PERMEABILITY: Moderately well drained; moderate permeability; negligible to high runoff. The lower part of the solum is saturated in the layers below 30 and 40 inches deep for 30 to 60 cumulative days during December through April in normal years. The soils are subject to rare flooding from tidal surges caused by hurricanes and tropical storms.

USE AND VEGETATION: Mostly used for woodland. Some small areas are in cropland or gardens.

DISTRIBUTION AND EXTENT: Southern Mississippi River Valley silty uplands (MLRA 134) in Louisiana. The series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: AUBURN, ALABAMA

SERIES ESTABLISHED: The series was proposed in 1996, East Baton Rouge Parish, Louisiana. The series was retypified and established in St. Mary Parish by an Amendment to the Correlation in 2002 based on data from the hyperthermic study. It was reclassified from a Glossic Hapludalf to an Oxyaquic Glossudalf based on closer observations in a pit at the current type location. Kleinpeter soils were formerly included in the Memphis and Loring series.

REMARKS: Diagnostic horizons and features in this pedon include:
Ochric epipedon. .0 to 11 inches (Ap and E horizons).
Argillic horizon. . . . 11 to 90 inches (Bt/E horizons).
Glossic horizon. . . . . 11 to 90 inches (Bt/E horizons).

ADDITIONAL DATA: Laboratory analyses on samples from the typifying pedon run by NSSL, Lincoln, Nebraska; sample number S02LA-101-001.

National Cooperative Soil Survey
U.S.A.