Here's why:

* Clastic refers to rocks made of fragments, or clasts, of other rocks.

* Sedimentary refers to rocks formed from sediment, which includes the fragments that make up clastic rocks.

So, clastic sedimentary rocks are made of broken pieces of other rocks, which are cemented together over time. Some common examples include:

* Sandstone: Made of sand-sized fragments.

* Conglomerate: Made of larger, rounded fragments.

* Breccia: Made of larger, angular fragments.

* Shale: Made of very fine clay-sized fragments.