Clastic rock refers to a type of sedimentary rock that is formed from the accumulation of sediment or rock fragments. These fragments are typically broken down by erosion and transportation processes, such as wind, water, or ice. There are several synonyms for clastic rock, including detrital rock, fragmental rock, and terrigenous rock. These terms refer to the same type of rock but have slightly different connotations. Detrital rock emphasizes the fact that the material is derived from existing rock, fragmental rock highlights the fragmented nature of the material, and terrigenous rock emphasizes that the material originates from the earth's surface. Regardless of the term used, clastic rock is an important part of the earth's geology.