Across
- 4. Age Close to the real age
- 7. Youngest to Oldest rocks
- 8. The Age of mammals
- 10. Which Era the dinosaurs existed
Down
- 1. Half of the remaining Isotope
- 2. A rock formation cuts through older rocks
- 3. Made from something that has already dies
- 5. Age Exactly to the real date
- 6. Rock or Fragment inside a rock
- 9. Dating and correlating the strata