Geologic Timescale Quiz Review

2. smallest unit of geologic time
5. geologic period that began with "great diversity of life-forms with shelly parts"
7. around 2000 million years ago, this gas starts forming in our atmosphere
13. a geologic period that happened after the death of all dinosaurs
14. the oldest rock layers are typically found here
15. the first geologic period of the mesozoic
19. a geologic period often split into two smaller periods named for states
20. a geologic period that has the earliest insects
22. short eon only lasting about 500 million years
23. a geologic period that ended 65 million years ago
25. the New York state fossil belongs to this family
26. a family of fossils that also went extinct at the end of the Mesozoic
27. a geologic period that ended 488 years ago
28. the middle geologic period of the Cenozoic

1. a geologic period that ended with the extinction of all Trilobites
3. geologic time period that the dinosaurs lived in
4. a geologic period that has the most index fossils found in New York
6. important fossils found in New York that represent specific geologic periods
8. a geologic period with a famous movie
9. a remainder of something that once was living, a bone, footprint or shell are common examples
10. earliest known forms of life were this type of cellular organism
11. the rock layers on the top are generally the _________
12. the science of understanding the order that rock layers formed in
13. the longest eon of geologic time
16. an example of a bird fossil found in New York
17. a geologic period during which there was the advance and retreat of the last continental ice
18. most recent geologic time period
21. the geologic period when the Taconian Orogeny happened
24. Phacops was a fossil in the _______ family