Earth's History

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Across
  1. 5. Type of rock formed from compacted sediments
  2. 7. Era where there was the breakup of a supercontinent, the evolution of animals, and the formation of mountains
  3. 11. Era where there was a the rise of mammals, the diversification of flowering plants, significant continental movement
  4. 12. Sedimentary formations stacked over time
  5. 13. Crack in Earth's crust where movement occurs
  6. 15. Cold-blooded animal with scales
Down
  1. 1. Geological principle stating older rock layers are under younger ones
  2. 2. Method for determining the age of fossils
  3. 3. Ancient supercontinent that existed over 200 million years ago
  4. 4. Event where a species dies out completely
  5. 6. Massive slabs of Earth's lithosphere that move over time
  6. 8. In reference to a certain time in Earth's history.
  7. 9. Subdivision of an era in the geological timescale
  8. 10. Preserved remains of ancient life
  9. 14. Cold-blooded vertebrate that lives on land and in water