* Conglomerate is a clastic sedimentary rock composed of rounded gravel-sized fragments (pebbles, cobbles, and boulders). These fragments are cemented together by a finer-grained matrix, often sand or clay.
* Shallow water environments are ideal for the deposition of pebbles, as waves and currents have enough energy to transport them but not enough to break them down further.
* Ocean shorelines are common locations for the accumulation of gravel-sized sediments, especially in areas with strong currents or wave action.
Other sedimentary rocks, like sandstone or shale, can also form in shallow water environments, but they are typically composed of smaller grain sizes like sand or silt.