2. Processes of Fossilization Proceed to Lesson

3. PermineralizationMold Replacement Recrystallization Carbonization After millions of years, most organic matter is either destroyed or broken. While there are forms of fossilization that will provide unaltered organic material, most fossils found are changed from their original composition. In this presentation, you will be familiarized with these Processes of Fossilization. DesiccationAmber Ready to test yourself?

4. Return Home

5. Return Home

6. Return Home

7. Return Home

8. Return Home

9.  Desiccation occurs when an animal dies in extremely dry and arid locations, such as deserts or some caves. Essentially, these conditions create an aseptic environment, where it is highly unlikely that it will be able to decay.  These fossils are very rare, due to the fact that they require that the remains be undisturbed by scavengers and that the environmental factors leading to desiccation remain constant.  Desiccation is almost identical to mummification, although it is conducted by natural conditions and are typically from further back in time. Return Home

10.  Essentially, Amber is tree sap that has hardened after many millions of years. Occasionally, insects and small animals would manage to get themselves caught in the sap, and would be preserved in almost pristine condition.  You may be familiar with this method of fossilization due to the movie Jurassic Park, where dinosaur DNA was extracted from parasitic insects trapped in Amber. In real life though, this is impossible, due to the fact that the half life of DNA is about 521 years. Return Home

11. A. Carbonization and Recrystallization B. Permineralization and Mold C. Permineralization and Carbonization D. Replacement and Mold This animal’s bones still have traces of its original organic matter. Also, markings around it’s body indicate that it at one point had fur. E. Desiccation and Carbonization

12. Try Again

14. Return to Title page

15. Try Again