Here's why:
* Conglomerate: This rock type is characterized by its rounded fragments of gravel-sized or larger sediments (pebbles, cobbles, and even boulders) held together by a cementing material. This cementing material is usually calcite, silica, or iron oxide.
* Other Types: While conglomerate is the most common type, other sedimentary rocks formed from large sediments include:
* Breccia: Similar to conglomerate, but with angular fragments.
* Diamictite: A poorly sorted, unsorted mixture of clay, silt, sand, and larger clasts.
Let me know if you'd like to know more about any of these rock types!