* Boulders: This is the most common term for large, irregularly shaped rocks.
* Rock fragments: This is a more general term that can refer to any piece of rock, regardless of size or shape.
* Cobbles: These are smaller than boulders, but still larger than pebbles. They often have a rounded shape.
* Erratics: These are boulders that have been transported a long distance, often by glaciers.
The best term to use will depend on the specific context and the size and shape of the rocks in question.
