what sedimentary rock is made from the shells and skeletons of dead marine animals?

The sedimentary rock made from the shells and skeletons of dead marine animals is limestone.

Quick Scoop

Limestone is a sedimentary rock that often forms in warm, shallow seas where marine organisms like corals, clams, and other shell‑bearing creatures live and die. When these organisms die, their calcium carbonate shells and skeletons accumulate on the seafloor and, over long periods, become compacted and cemented into solid limestone rock.

A bit more detail

• Many limestones are called biochemical or bioclastic because they are made from biological remains such as shells and skeletons.

• Specific types include fossiliferous limestone (packed with visible fossils), coquina (made almost entirely of broken shell fragments), and chalk (from microscopic plankton skeletons).

In short: when you think “rock made from sea shells and marine skeletons,” the textbook answer is limestone.

TL;DR: The rock you are looking for is limestone , a biochemical sedimentary rock formed from compacted shells and skeletons of marine organisms.

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