Here are some examples of fragmental rocks, broken down by the size of the fragments:
Coarse-grained (greater than 2mm):
* Conglomerate: Rounded fragments, often mixed sizes.
* Breccia: Angular fragments, often mixed sizes.
* Rudaceous: This is a general term for rocks with coarse fragments, including conglomerate and breccia.
Medium-grained (0.0625 - 2mm):
* Sandstone: Composed mainly of sand-sized grains. Different types exist based on the composition of the sand (quartz sandstone, arkose, greywacke).
Fine-grained (less than 0.0625 mm):
* Siltstone: Composed mainly of silt-sized grains.
* Mudstone: Composed mainly of clay-sized grains.
* Shale: A type of mudstone that exhibits a layered (laminated) structure.
Other fragmental rocks:
* Volcanic breccia: Made from angular fragments of volcanic rock.
* Tuff: A fine-grained volcanic rock composed of ash and other volcanic debris.
* Agglomerate: Similar to volcanic breccia but with larger fragments (greater than 64 mm).
It's important to note that the size of the fragments is not the only factor determining the type of fragmental rock. Other factors include the composition of the fragments, their shape, and the cementing material.
Do you have a specific type of fragmental rock in mind? If so, I can give you more details about it.