How is the coaresest sedimentary rock made?

Answer 1

The coarsest sedimentary rock is made by the process of sedimentary rock called "Deposition". Deposition is the process of laying down sediment carried away by either water wind or ice.

Answer 2

Coarse sedimentary rocks like conglomerate and breccia are formed from the deposition and lithification of large fragments or particles such as pebbles, cobbles, or boulders. These fragments are often transported by fast-moving currents like rivers or avalanches, which deposit them in layers that later solidify into coarse sedimentary rocks through the process of compaction and cementation.