Catastrophes and Lesser Calamities: The Causes of Mass Extinctions

摘要: 1. In search of possible causes mass extinctions 2. Historical background 3. Evidence for catastrophic organic changes in the geological record 4. Impact by comets and asteroids 5. Sea-level 6. Oxygen deficiency oceans 7. Climate change 8. Volcanic activity 9. Pulling strands together 10. The evolutionary significance 11. influence humans Notes suggestions further reading References Glossary Index