Geologic Time Scale

2. layers of dead vegetation soon turned into this (carboniferous)
5. geologic time periods are divided further into these (home page)
7. proterozoic life evolved from simple bacteria having this type of cell (precambrian time)
9. bi-valves that looked like clams (carboniferous)
13. a fish whose name means “shell skins” (devonian)
14. probably the most famous dinosaur of all (cretaceous) (two words)
16. there were so many of these that the jurassic period was also called the “the Age of what” (jurassic tab)

1. cenozoic has been nicknamed “rise of the what” (cenozoic tab)
3. an invertebrate species that exploded during the jurassic times (jurassic tab)
4. what cenozoic means (cenozoic tab) (two words)
6. probably the biggest development of life during this period are these (quaternary)
8. south america and this continent broke apart during this period (cretaceous)
10. what sharks are called (devonian)
11. armored fish that ruled the devonian seas (carboniferous)
12. dinosaurs with long necks (jurassic tab)
15. large cat (quaternary)