What is an example of a sedimentary rock?

Limestone is an excellent example of a sedimentary rock because it forms from the accumulation of organic remains, such as shells and coral, or from the precipitation of calcium carbonate in water. This process can take place over long periods in marine environments, leading to layers that are characteristic of sedimentary formations.

In contrast, basalt and granite are igneous rocks: basalt forms from the rapid cooling of lava at the surface, while granite is formed from the slow crystallization of magma beneath the Earth's surface. Marble, on the other hand, is a metamorphic rock that originates from the alteration of limestone under heat and pressure. Thus, limestone stands out as a sedimentary rock due to its unique formation process and the materials from which it is derived.