An example of soil as a source of raw material can be found in ancient ceramic production. The Maya ceramics showed traits inherited from soils and sediments used as raw material.[8] The understanding of soil formation process can help define certain type of soil and reflect the composition of soil minerals. However, the natural area of productive soils is limited and due to increasing pressure of cropping, forestry, and urbanization, extracting soil as a raw material needs to be controlled for.