Here's why:
* Clastic refers to the fact that the rock is made up of fragments (clasts) of other rocks and minerals.
* Sedimentary indicates that the rock formed from sediments that were transported, deposited, and then cemented together.
Examples of clastic sedimentary rocks include:
* Conglomerate: Made of large, rounded fragments.
* Breccia: Made of large, angular fragments.
* Sandstone: Made of sand-sized grains.
* Siltstone: Made of silt-sized grains.
* Shale: Made of clay-sized grains.