Forming Fossils
By: Jami D.
What are fossils?
Types of Fossils!
Mold/Cast Fossil
-Mold forms when a hard part of an organism is buried in sediment. -Casts form as a result of the mold
Carbon Films
When an organism dies sediment is released and only carbon remains and shows delicate parts of plants.
Trace Fossils
They show the activity of animals and where they went.
Preserved Remains
3 ways this happens 1. insect gets trapped in sap and dies 2. Animal gets stuck in tar 3. Body freezes.
Petrified Fossils
Happens when minerals replace all or most of an organism.
Process of Fossilization
1. An organism dies
2. Buried by sediment like volcanic ash
3. The bones are protected by the sediment
4. More layers are placed on top
5. The layers put calcium in the bones
6. Movement by the earth or tectonic plates cause the fossil to rise.
7.Erosion happens
8. Erosion causes rock to fade away
9. Fossils come to surface
10. People find the fossil
Picture of Fossilization
Fossilization
How do fossils help us organize geological timelines?
5 Fun Facts!
2.They are most common in sedimentary rock and are rare in igneous rock
3.Whole animals can stay trapped in sap, tar, or ice
4.A fossil isn't the actual bone it’s just a thing that was the same shape as the original it is just made up of minerals and other material that has hardened.
5.The oldest fossils are called Stromatolites!