Some are, yes. But broadly speaking, sedimentary is rock made of sediment, which can be far smaller. A classic example of a rock/pebble rock is conglomerate.
conglomerate
Conglomerate is a type of sedimentary rock that forms from large sediments like rocks and pebbles. These sediments are cemented together by smaller particles like sand and mud to create a rock with a clastic texture. Conglomerate is often found in areas where there has been significant water movement, such as riverbeds and alluvial fans.
conglomerate
Breccia.
Conglomerate
Yes, coarse sedimentary rock can be made up of pebbles or boulders. Coarse sedimentary rocks are formed from the accumulation and cementation of larger grains, such as pebbles and boulders, that are transported by water, ice, or wind. These larger grains are typically found in rocks like conglomerate or breccia.
Sediments can change into sedimentary rocks through processes like compaction and cementation. They can also be eroded and transported to new locations by forces like wind and water.
Clasts Pebbles (in a conglomerate) Geodes
Many sedimentary rocks are made from the broken bits of other rocks. These are called clast sedimentary rocks. The broken bits of rocks are called sediment. Sediment is the sand you find at the beach, the mud in a lake bottom, the pebbles in a river, and even the dust on furniture. The sediment may, in time, form a rock if the little pieces become cemented together
Clastic and organic sedimentary rocks like conglomerate, coal, some limestones, and shale, are formed under pressure from overlying sediments.
No, rocks made of sediments are called sedimentary rocks. Igneous rock comes from volcanic activity -- lava and the like.
Sedimentary rocks are formed through the accumulation and cementation of sediments or organic materials over time. These sediments can come from the erosion of pre-existing rocks, the remains of plants and animals, or chemical precipitation. Through processes like compaction and cementation, these sediments are eventually lithified into sedimentary rocks.