Fossils

By: Beth Ann Flanders

What are Fossils?

The remains or impression of a prehistoric organism preserved in petrified form as a mold form or a casting rock.

What type of rocks are fossils found in?

Fossils are most commonly found in sedimentary rocks, but all sedimentary rocks are not necessary fossiliferous.

Examples of rocks with fossils in them.

How are fossils formed?

HOW ARE FOSSILS 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 or silt.Soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over top and hardens the rock.

Differents types of scenarios......

First, there was an ammonite who lived in the ocean that was killed,and then covered by sand.Then the fern tree was found in soil that was now the top of the sand creating a rock layer. Next, a dinosaur was found in a exposed outcrop of rock and created a third layer to the rock . The rock hardened with pressure and was cemented together.