period

Across

2. The first epoch of the Cenozoic Era, following the mass extinction of the dinosaurs.
5. Period characterized by diverse marine life and coral reefs.
12. A period known for reef-building and the diversification of therapsids.
13. Period characterized by high sea levels and the first coral reefs.
14. The last stage of the Late Jurassic, known for its marine and terrestrial diversity.
16. Early stage of the Middle Jurassic, known for its marine fossils.
17. Stage known for the rise of some of the largest dinosaur species.
19. Marked by the dominance of marine reptiles and ammonites.
22. A stage within the Triassic, known for marine limestones and dolomites.
25. Epoch marked by the emergence of many early archosaurs.
29. Ended with a mass extinction event, including the demise of the dinosaurs.
33. Named after an English town, known for its rich marine deposits.
34. Stage when early angiosperms (flowering plants) began to diversify.
37. A stage during which major chalk deposits were formed.
39. Time known for significant volcanic activity and marine transgressions.
40. The last stage of the Permian, ending with the greatest extinction event in Earth's history.
42. Known for its very warm climate and marine transgressions.
43. Time marked by relatively high sea levels and diverse marine life.
44. Period marked by extensive forests and formation of vast coal deposits.
45. The earliest stage of the Jurassic period, following the Triassic extinction.
46. Ended with the largest mass extinction in Earth's history.
47. Time when grasslands began expanding, and first elephants appeared.
48. Time characterized by warm shallow seas and abundant marine life.
50. Epoch marked by climate cooling and the spread of grasslands.

Down

1. Stage when the first true dinosaurs appeared.
3. Period that saw a high diversity of dinosaur species.
4. Time noted for the development of many new species of ammonites.
6. Includes the current geological epoch and Ice Ages.
7. Time when dinosaurs dominated and the first birds appeared.
8. Epoch known for warm climates and the diversification of mammals.
9. A stage of the Late Permian, preceding the massive end-Permian extinction.
10. The first stage of the Late Cretaceous, marked by abundant marine life.
11. Epoch marked by the widespread deposition of limestone.
14. Period that marks the beginning of the Mesozoic Era and rise of dinosaurs.
15. Period following the extinction of the dinosaurs, marked by the rise of mammals.
18. The earliest age of the Cretaceous period.
20. Time marked by the diversification of early dinosaurs and marine reptiles.
21. The current geological epoch, beginning around 11,700 years ago.
23. The final stage of the Cretaceous, marked by the famous mass extinction event.
24. Time of the first vascular plants and jawed fish emergence.
26. The last stage of the Triassic, preceding the rise of the Jurassic period.
27. The period known for the "explosion" of diverse life forms.
28. Time characterized by recovery from the end-Permian extinction and rise of reptiles.
30. Period of significant mountain building and cooling climate.
31. Stage known for the development of many reef-building organisms.
32. Known as the "Age of Fishes," saw the rise of amphibians.
35. Period marked by the dominance of flowering plants and early birds.
36. The earliest stage of the Triassic, known for its recovery phase following a mass extinction.
38. Time of repeated glaciations and emergence of Homo sapiens.
41. Known for its extensive black shale deposits and rich fossil content.
46. Time characterized by the diversification of early dinosaurs and marine reptiles.
49. Time characterized by significant mammal evolution and development of modern species.