Clay
12 ensp 0183 ensp Clay is a finely grained natural rock or soil material that combines one or more clay minerals with possible traces of quartz SiO 2 metal oxides Al 2 O 3 MgO etc and organic matter Geologic clay deposits are mostly composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure Clays are plastic due to particle size and geometry as well as