Eden and Edenton soils contain more clay in the upper sola. In addition, Edenton soils contain more sand in the sola. Derinda soils are on bedrock controlled topography of the driftless areas on rounded ridgetops, saddles between hills, or benches on hill sides. Slopes are commonly 4 to 12 percent. Derinda soils formed in a thin layer of loess and in residuum weathered from calcareous shales of Ordovician Age.
Summers are hot and winters are cold.
Derinda soils are associated with soils formed in thicker loess or having prairie influence or both, and soils underlain by limestone. These are the Dubuque , Eleroy , and Massbach soils of the competing series and the Keltner , Ridott , and Schapville soils. Gratiot and Ridott soils have darker Ap horizons and mottles of 2 chroma in the upper 10 inches of the argillic horizon. The Keltner and Schapville soils have mollic epipedons. Moderately well and well drained.