Abstract
The mining of china clay in Cornwall is an industry dating from the middle of the eighteenth century, and one which has grown to major prominence in the south-western peninsula, as illustrated by the historical accounts of Barton (1966) and Hudson (1969). Present-day mining processes give rise to two main types of particulate waste. The coarser waste, or tip-sand, is deposited on land to form the massive white tips which characterize the scenery of the Cornish china clay mining areas, although small amounts may be used locally as a building aggregate. The finer-grained waste, known as micaceous residue, is produced in lesser quantities and is disposed of in a different manner.