What sedimentary rocks is usually biochemical in origin?

Limestone is a common sedimentary rock that is typically biochemical in origin. It forms primarily from the accumulation of calcium carbonate, often derived from the shells and skeletons of marine organisms such as corals and mollusks. Other examples include chalk, a type of limestone made from microscopic marine organisms, and some types of dolostone that may also have a biological component. These rocks often indicate past marine environments where biological activity was prevalent.