Geologic Timescale Quiz Review

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Across
  1. 2. smallest unit of geologic time
  2. 5. geologic period that began with "great diversity of life-forms with shelly parts"
  3. 7. around 2000 million years ago, this gas starts forming in our atmosphere
  4. 13. a geologic period that happened after the death of all dinosaurs
  5. 14. the oldest rock layers are typically found here
  6. 15. the first geologic period of the mesozoic
  7. 19. a geologic period often split into two smaller periods named for states
  8. 20. a geologic period that has the earliest insects
  9. 22. short eon only lasting about 500 million years
  10. 23. a geologic period that ended 65 million years ago
  11. 25. the New York state fossil belongs to this family
  12. 26. a family of fossils that also went extinct at the end of the Mesozoic
  13. 27. a geologic period that ended 488 years ago
  14. 28. the middle geologic period of the Cenozoic
Down
  1. 1. a geologic period that ended with the extinction of all Trilobites
  2. 3. geologic time period that the dinosaurs lived in
  3. 4. a geologic period that has the most index fossils found in New York
  4. 6. important fossils found in New York that represent specific geologic periods
  5. 8. a geologic period with a famous movie
  6. 9. a remainder of something that once was living, a bone, footprint or shell are common examples
  7. 10. earliest known forms of life were this type of cellular organism
  8. 11. the rock layers on the top are generally the _________
  9. 12. the science of understanding the order that rock layers formed in
  10. 13. the longest eon of geologic time
  11. 16. an example of a bird fossil found in New York
  12. 17. a geologic period during which there was the advance and retreat of the last continental ice
  13. 18. most recent geologic time period
  14. 21. the geologic period when the Taconian Orogeny happened
  15. 24. Phacops was a fossil in the _______ family