What is an example of a chemical sedimentary rock?

Limestone is an example of a chemical sedimentary rock because it primarily forms from the precipitation of calcium carbonate, which can occur through processes such as evaporation and biological activity. When organisms like corals and mollusks die, their shells accumulate on the ocean floor and contribute to the limestone formation over time. This differentiates limestone from other types of sedimentary rocks, which may be formed from the accumulation of fragments of other rocks or from direct physical processes.

In contrast, conglomerate is a clastic sedimentary rock composed of rounded fragments cemented together, while slate is a metamorphic rock that originates from shale under heat and pressure. Marble, although a metamorphic rock, is formed from the recrystallization of limestone or dolomite due to metamorphic processes. Thus, limestone uniquely stands out as a classic example of chemical sedimentary rock.