Clay rock is a type of sedimentary rock composed of clay-sized particles. It is formed by the accumulation and consolidation of clay-sized particles, such as silt and clay, which are transported by water or wind. Shale is a type of clay rock that is formed from the compaction of mud and silt. It is characterized by its thin layers and fissility, which allows it to be easily split into thin layers. Ali is a type of clay rock that is composed of aluminum silicate minerals. It is usually found in association with other clay minerals, such as kaolinite and montmorillonite.