Here's why:
* Clastic: Means the rock is made up of fragments (clasts) of other rocks.
* Coarse-grained: Indicates the fragments are relatively large, typically greater than 2 millimeters.
* Angular: Means the fragments have sharp edges and corners, indicating they haven't been transported far or subjected to much wear and tear.
Other related terms:
* Conglomerate: Similar to breccia but with rounded fragments, suggesting more transport and weathering.
* Sandstone: A clastic rock with sand-sized fragments.
* Mudstone: A clastic rock with very fine-grained fragments.
