They may be of any kind.You can't just recognize it by seeing how it looks.There are mainly three types Sedimentary Rocks, Metamorphic Rocks and Igneous Rocks.Igneous Rocks are called the basis of Rocks because they are what by which all the others were formed.
Erosion and weathering will cause rocks to become rounded.
Conglomerate and sandstone are rocks made from rounded grains. Conglomerate consists of larger, rounded gravel-sized particles cemented together, while sandstone is composed of smaller, rounded sand-sized grains cemented together.
They fragment and become jagged, they become rounded by means of water erosion, which is why rounded rocks are found by rivers, creeks, etc.
Pebbles.
Conglomerates.
"pebbles".
A sedimentary rock made up of rounded fragments of other rocks is called a conglomerate.
Sedimentary rocks made up of rounded pebbles cemented together are called conglomerate rocks. These rocks typically have a coarse texture and are formed through the deposition and lithification of pebbles in a sedimentary environment.
Gastroliths were the smooth, rounded rocks that dinosaurs ingested to help them digest and grind their food. These rocks were swallowed and moved around in the stomach to break down tough plant material.
After abrasion, such as being tumbled in a stream, the shape of rocks becomes smoother and more rounded. Continued abrasion can wear down sharp edges and angles, creating more rounded and polished surfaces on the rocks.
By weathering
What in the world are small rocks and bg rocks?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!