Geologic Time

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Across
  1. 1. All life Lives in the ocean
  2. 3. Contains two periods (Mississippian & Pennsylvanian)
  3. 7. What era was the cambrian period in?
  4. 8. An explosion of new life forms
  5. 9. Devonian period was known as "Age of the ____"
  6. 11. Carboniferous period was known as "Age of the _____"
  7. 13. BEGINNING OF THE FOSSIL RECORD
  8. 15. Oldest Rocks
  9. 16. Exposed layers of craton
  10. 19. Sedimentary Rock with a lot of preserved fossils
Down
  1. 2. Animals w/o backbones
  2. 4. How many periods are in the paleozoic era?
  3. 5. Period known as the "Age of the Amphibians"
  4. 6. 1st Land Plants and ______ Appear during the Silurian period
  5. 10. Mats of Algae
  6. 12. Warm humid climate allows for the formation of ______.
  7. 14. BEGINNING OF GEOLOGIC TIME
  8. 17. Salt flats
  9. 18. 4th period of the Paleozoic Era
  10. 20. 3rd period of the Paleozoic Era