Types of Clay Deposits

In nature, clays can be found either in the same location where they were formed or they can be found in a location where they were transported after formation. Clay deposits that are found where they were formed are referred to as primary or residual deposits. Clays that have been transported after formation are said to be in secondary or sedimentary deposits. The discussion in this section will be limited to kaolinite, but will be expanded to other types of clays of significance to the ceramics industry in the following section.