LOCATION DIMMICK ND+MT SD
Established Series
CJH
01/2023
DIMMICK SERIES
The Dimmick series consists of very deep, very poorly drained, very slowly permeable soils that formed in clayey sediments. These soils are in depressions on uplands and in lake basins and have slopes of 0 to 2 percent. Mean annual air temperature is 41 degrees F, and mean annual precipitation is 16 inches.
TAXONOMIC CLASS: Fine, smectitic, frigid Vertic Epiaquolls
TYPICAL PEDON: Dimmick clay in native grass. (Colors are for moist soil unless otherwise stated)
Oe--0 to 3 inches; roots and partly decomposed stems and leaves of plants; loose; abrupt smooth boundary. (0 to 4 inches thick)
A--3 to 6 inches; very dark gray (10YR 3/1) clay, gray (10YR 5/1) dry; moist; many very fine distinct dark yellowish brown (10YR 4/4) redoximorphic concentrations; strong fine and very fine angular blocky structure; hard, firm, very sticky and very plastic; many fine and medium roots; neutral; gradual wavy boundary.
Ag--6 to 23 inches; very dark gray (5Y 3/1) clay, gray (5Y 5/1) dry; many medium prominent dark yellowish brown (10YR 4/4) redoximorphic concentrations; weak fine angular blocky structure; hard, very firm, very sticky and very plastic; common fine and few medium roots; neutral; gradual smooth boundary. (Combined A horizon 12 to 24 inches thick)
BCg--23 to 43 inches; dark gray (5Y 4/1) clay, gray (5Y 6/1) dry; many medium prominent olive brown (2.5Y 4/4) redoximorphic concentrations; weak fine subangular blocky structure; hard, very firm, very sticky and very plastic; few roots; neutral; diffuse wavy boundary.
Cg--43 to 63 inches; dark gray (N 4/0) clay, gray (N 6/0) dry; many coarse prominent olive brown (2.5Y 4/4) redoximorphic concentrations; massive; hard, very firm, very sticky and very plastic; slightly alkaline.
TYPE LOCATION: Dunn County, North Dakota; 4 miles south, 3 miles east of Killdeer; 1056 feet south and 180 feet east of the northwest corner, sec. 11, T. 144 N., R. 95 W.
RANGE IN CHARACTERISTICS: Depth to carbonates ranges from 20 to more than 40 inches from the mineral soil surface. The mollic epipedon ranges from 14 to 24 inches in thickness. The soil moisture control section is saturated for up to 21 days beyond the summer solstice in most years.
The A horizon has hue of 10YR, 2.5Y or 5Y or is neutral, value of 2 or 3, 4 or 5 dry, and chroma of 2 or less. It is silty clay, clay, or silty clay loam and is slightly acid to moderately alkaline. Some pedons have ABk or Bk horizons.
The BCg and Cg horizons have hue of 2.5Y, 5Y, or is neutral, value of 4 to 8, and chroma of 0 to 3. They are clay or silty clay, but some pedons have strata of silty clay loam or sandy clay loam. They are neutral to moderately alkaline. Some pedons do not have a BCg horizon. Some pedons are loam, silt loam or silty clay loam below 40 inches.
COMPETING SERIES: These are the
Foxlake and
Fulda series. Foxlake soils have rock fragments and formed in till. Fulda soils are not saturated beyond the summer solstice in most years. Series that competed prior to the classification change include the
Mountmed soils. Mountmed soils have a mean annual precipitation of 35 inches most of which falls in the fall and winter. In addition, they have rock fragments and a mollic epipedon less than 14 inches thick.
GEOGRAPHIC SETTING: Dimmick soils are in level or nearly level, slightly concave depressions on uplands and in lake basins. The soil formed in clayey sediments. Slope ranges from 0 to 2 percent. Mean annual air temperature is 39 to 45 degrees F, and mean annual precipitation is 10 to 18 inches. Most of the precipitation falls in the spring and summer.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Arnegard,
Belfield,
Farland,
Grail,
Morton,
Reeder, wYOLA,
Sen and
Vebar soils. Arnegard, Belfield, Farland, Grail and wYOLA soils are in nearby swales and on terraces and are well drained. Morton, Reeder, Sen and Vebar soils are on nearby uplands and are well drained.
DRAINAGE AND PERMEABILITY: Very poorly drained. Runoff is ponded. Water runs into the basins and remains for weeks at a time. Permeability is very slow.
USE AND VEGETATION: Some is in hay and pasture. Native vegetation is slough sedge, rivergrass and rushes.
DISTRIBUTION AND EXTENT: In small areas in western North Dakota, eastern Montana and northwestern South Dakota. The extent is moderate.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Salina, Kansas
SERIES ESTABLISHED: McKenzie County, North Dakota, 1932.
REMARKS: Diagnostic horizons and features recognized in this pedon are: mollic epipedon - the zone from 3 to 23 inches (A and Ag horizons); characteristics associated with wetness - chroma of 1 and distinct redoximorphic concentrations in the lower part of the mollic epipedon (Ag horizon).
National Cooperative Soil Survey
U.S.A.