Fossils

By: Emilia M.

WHAT ARE FOSSILS?

Fossils are the remains or traces of an organism that lived long ago.

WHAT TYPE OF ROCK ARE THEY FOUND IN?

Fossils can be found in these two rocks: sedimentary, or igneous.

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.

THE 5 STEPS ON HOW FOSSILS ARE FORMED!

If Animal:

1. dies, and is buried by mud or silt.

2. the soft tissue decomposes leaving only bones.

3. over time sediment builds over the top, into rock in between rocks.

(if in water)

4. over time from pressure the clay might rise above water.

5. weathering, erosion, + deposition will wear away rock

6. the fossil will be exposed!

Big image