Geological Time

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Across
  1. 2. The process which exposes ancient rock formations
  2. 7. Name given to animals that do not have a backbone
  3. 8. Rock type that allows excellent fossils to form
  4. 10. Scientists use these as evidence to support geological theories
  5. 12. The time period in which vertebrates first developed
  6. 13. The most recent of the geological time periods
Down
  1. 1. The process by which ancient living beings are preserved
  2. 2. Geological time is broken up into 4 of these
  3. 3. Important group of arthropods in geological time
  4. 4. Famous ancient life form found of the Western Australian coast
  5. 5. The oldest geological time period
  6. 6. Believed to have caused the extinction of the dinosaurs
  7. 9. Referred to as the "Age of the Dinosaurs"
  8. 11. The scientific study of rocks