Gilpin soils occupy similar positions, have base saturation of less than 35 percent and are fine-loamy. The moderately well drained Brookside, somewhat poorly drained Sees, and well drained Woolper soils formed in clayey colluvium on footslopes. Surface runoff is rapid. Permeability is moderate in the silty material and moderately slow or slow in the underlying material. Most of these soils are cultivated or used for pasture.
Principal crops are meadow, corn, wheat, or other cultivated crops.
Some areas are forested. Native vegetation was mixed hardwoods with oak, tulip poplar, beech, maple, and hickory as the most common species. Some areas of former cropland or pasture areas are reverting to woodland. The Allegheny Plateau in southeast Ohio and in Illinois, and possibly nearby areas of West Virginia, Pennsylvania, and Kentucky. The soils are moderately extensive, about 30,000 acres.