Distance between the centers of the microknolls and the centers of the microdepressions ranges from 5 to 12 feet. Gilgai microrelief consists of microknolls 1 to 10 inches higher than the microdepressions. Intersecting slickensides occur within 40 inches and commonly begin at about 22 inches. The A horizon has hue of 7.5YR or 10YR, value of 3 to 5, and chroma of less than 1.5. Texture is clay, silty clay, clay loam, or silty clay loam and the content of clay ranges from 35 to 60 percent.
Reaction is slightly acid to moderately alkaline.
The AC horizon has hue of 2.5YR to 7.5YR, value of 4 to 6, and chroma of 2 to 4. Texture is clay, silty clay, clay loam, or silty clay loam and the content of clay ranges from 35 to 60 percent. Reaction is mildly or moderately alkaline. The C horizon is brownish or reddish clay with or without grayish clay layers. Content of clay ranges from 40 to 60 percent.