1. Fossils and Earth’s Geologic History PRESENTED BY: MARK A. VAN HECKE ANCHOR BAY HIGH SCHOOL NEW BALTIMORE, MI

2. ALL GEOLOGIC TIME IS DIVIDED INTO TWO EONS PHANEROZOIC FROM 570 MILLION YEARS AGO TO THE PRESENT PRECAMBRIAN EON FROM 3.4 BILLION YEARS AGO TO 570 MILLION YEARS AGO

3. EACH EON IS DIVIDED INTO PERIODS ONLY THE PHANEROZOIC IS DIVIDED INTO PERIODS, THE THREE YOU NEED TO KNOW ARE PALEOZOIC MESOZOIC CENOZOIC

4. EACH OF THE ERAS IN TURN IS DIVIDED INTO PERIODS

5. PALEOZOIC ERA CAMBRIAN ORDOVICIAN SILURIAN DEVONIAN MISSISSIPIAN PERMIAN

6. MESOZOIC ERA TRIASSIC JURASSIC CRETACEOUS

7. CENOZOIC ERA TERTIARY QUATERNARY

8. PERIODS IN TURN ARE DIVIDED INTO EPOCHS

9. THE PERIODS OF THE PALEOZOIC AND MESOZOIC ARE SIMPLY DIVIDED INTO EARLY, MIDDLE AND LATE EPOCHS

10. EPOCHS OF THE CENOZOIC ERA ARE GIVEN DISTINCTIVE NAMES IN EACH OF THE PERIODS

11. TERTIARY PERIOD PALEOCENE EOCENE OLIGOCENE MIOCENE PLIOCENE

12. QUATERNARY PERIOD PLEISTOCENE HOLOCENE (PRESENT)

13. MOST GEOLOGISTS THINK THAT THROUGHOUT IT’S HISTORY EARTH’S CLIMATE HAS SEE- SAWED BETWEEN A ‘HOT HOUSE’ AND AN ‘ICE BOX’ CLIMATE

14. PreCambrian Eon 570 million-3.4 billion years ago

16. PALEOZOIC ERA 570 MILLION YEARS AGO- 225 MILLION YEARS AGO

17. CAMBRIAN PERIOD 570-500 MILLION YEARS AGO

20. ORDOVICIAN PERIOD 430-500 MILLION YEARS AGO

23. SILURIAN PERIOD 395-430 MILLION YEARS AGO

26. DEVONIAN PERIOD 345-395 MILLION YEARS AGO

31. THE MISSISSIPPIAN 325-345 MILLION YEARS AGO AND PENNSYLVANIAN PERIODS 280-325 MILLION YEARS AGO MAY BE GROUPED TOGETHER

32. AS THE CARBONIFEROUS PERIOD

37. PERMIAN PERIOD 225-280 MILLION YEARS AGO

40. MESOZOIC ERA

41. TRIASSIC PERIOD 190-225 MILLION YEARS AGO

46. JURASSIC PERIOD 136-190 MILLION YEARS AGO

51. CRETACEOUS PERIOD 65-136 MILLION YEARS AGO

54. CENOZOIC ERA

55. TERTIARY PERIOD

56. PALEOCENE EPOCH 54-65 MILLION YEARS AGO

58. EOCENE EPOCH 37.5-54 MILLION YEARS AGO

60. OLIGOCENE EPOCH 26 –37.5 MILLION

62. MIOCENE EPOCH 5-26 MILLION YEARS AGO

65. QUATERNARY PERIOD

66. PLEISTOCENE EPOCH 11,000-1.8 MILLION YEARS AGO

68. HOLOCENE EPOCH 11,000 YEARS AGO- PRESENT