An example of mechanically formed sedimentary rock is?

An example of a mechanically formed sedimentary rock is conglomerate. Conglomerate is a type of sedimentary rock that is made up of large, rounded clasts (fragments) of rock that have been cemented together. These clasts are often several centimeters in diameter and are typically made up of a variety of different rock types. Conglomerate forms when these clasts are deposited by a river or other flowing body of water and then cemented together over time by minerals such as silica or calcium carbonate. Other examples of mechanically formed sedimentary rocks include sandstone and shale. In contrast, chemically formed sedimentary rocks, such as chalk and dolomite, are formed by precipitation from water that is saturated with dissolved minerals. Coal, on the other hand, is an organic sedimentary rock that forms from the remains of plants that have been compressed and altered over time.