What is topsoil and subsoil and bedrock?
Topsoil is considered to be the outermost layer of soil. It is generally meant to indicate the first 2 to 8 inches of ground. Subsoil is, as the name indicates, located below the topsoil. This portion of soil may include siliclastic materials, such as clay, that has been partially eroded by the elements. Bedrock is below the subsoil, consiting of consolidated rock. The rockhead is the top of the bedrock, followed by superficial deposits, also known as drift, which can run many meters below the surface.
