Fossils

Diya Chetan

What are fossils?

the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.

How are they formed

Fossils are formed in a number of different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt. Soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.
Fossils for kids

Examples of how they formed.

Freezing, drying and encasement, such as in tar or resin, can create whole-body fossils that preserve bodily tissues. These fossils represent the organisms as they were when living, but these types of fossils are very rare.