Soil of Champaign County
The surface of Champaign County, as a general thing, is composed of black prairie soil, from one to five feet in thickness. This prairie soil is under-laid by a yellow clay subsoil. Below this clay subsoil occur alternate beds of clay, gravel and quicksand of the drift formation to the depth of from 120 to 250 feet, below which there are other alternations of shale, slate, soapstone and limestone, with one or more beds of coal. Much of the loose materials found above the rocky beds of Champaign County are composed of what is called “drift,” which consists of clay, …