Notes. 3/4/10

1) Fossils form if the organism is quickly buried.

2)Hard parts of organisms are more likely to be Fossilized than soft parts.

Types of Preservation-

1) Per-mineralized Fossils- Fossils in which spaces are filled with minerals by moving ground water

2)Carbon Film- When an organism is broken down carbon film a silhouette is left behind.

3)Molds-cavity in rock made when an organism is buried.

4)Cast- sediments move into a mold and create a cast.

5)Occasionally, organisms are preserved in ice, tar, or amber.

6)Trace Fossils- Evidence of organism activity.

7)Index Fossils- abudeant geographically widespread organisms that existed for a short period of time