Geologic time scale

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Across
  1. 4. This is another tool to determine the age of rocks.
  2. 5. another name for Mesozoic era
  3. 7. another name for Paleozoic era
  4. 8. Marks the formation of the super continent, Pangaea
  5. 9. Periods of ice ages
Down
  1. 1. It is like saying you’re relatively younger than your grand father
  2. 2. another name for Cenozoic era
  3. 3. Most accurate form of dating, also call radiometric dating
  4. 6. Rocks in the Petrified Forest in AZ were deposited during this time
  5. 8. Marks the beginning of Earth approximately 4.6 b.y.