Across
- 3. First eon
- 4. Age of the dinosaurs
- 6. Order of layers show age
- 9. Estimating age based on the law of superposition
- 10. Current eon
Down
- 1. Used on very old fossils
- 2. Used on younger fossils
- 5. Cuts through older layers
- 7. When the older is inside the newer
- 8. rate of decay