Does Fossil Containing Limestone Form?

Limestone is a sedimentary rock made almost entirely of fossils. Fossils are the remains of ancient plants and animals, like an imprint in a rock or actual bones and shells that have turned into rock. Fossils are found in sedimentary rocks and hold the clues to life on Earth long ago.

How is limestone formed?

Limestone is formed in two ways. It can be formed with the help of living organisms and by evaporation. Ocean-dwelling organisms such as oysters, clams, mussels and coral use calcium carbonate (CaCO3) found in seawater to create their shells and bones.

What fossil species form limestone?

1. Common fossils in the limestone, from left to right: corals, brachiopods, snails, and crinoids. Corals are common in the limestones of the Burren, and are often concentrated at specific levels in the limestone. Corals are still alive today, and form great reefs in shallow tropical waters.