Fossils & Geologic Time

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Across
  1. 3. Type of fossil that shows us dead animals activities. EX. footprint, burrow, etc.
  2. 4. Heat and pressures causes this type of fossil. Ex. Oil
  3. 6. _________ extinction, biggest extinction event in Earth's History
  4. 8. 90% of Earth's History was during this Era
  5. 11. This is known as the age of the mammals
Down
  1. 1. Over time, minerals take the place of calcium in bones
  2. 2. This is known as the age of the Fish
  3. 5. Total Preserved organism
  4. 7. Dinosaurs were the dominant animal during this Era.
  5. 9. The 3D shape that is created after sediments fill in the empty space.
  6. 10. The cavity left behind after an organism decays.