Here's why:
* Angular particles: This indicates that the particles haven't been transported very far, as they haven't been rounded by abrasion during transport.
* Gravel-sized particles: This refers to the size of the fragments, which are larger than sand grains.
Other key features of breccia:
* Clastic: It's made up of fragments of other rocks.
* Non-foliated: The fragments aren't arranged in layers or sheets.
* Can be formed by:
* Volcanic eruptions: Breccia can form from volcanic debris.
* Faulting: Rocks can be broken and reassembled into breccia along fault lines.
* Landslides and rockfalls: Angular fragments can be mixed together in these events.
