Across
- 2. Time it takes for half of the isotopes to decay
- 5. Youngest layer is at the top, old at bottom
- 8. A freshwater crocodile from 280 million years ago
- 10. An estimate of something's age
- 12. Remains of a plant eater from 250 million years ago
- 13. Main continuous expanse of land
Down
- 1. Remains of a woody shrub from 299 million years ago
- 3. Proposed the theory of Continental Drift
- 4. Earths continents moving/drifting
- 6. Name of the supercontinent
- 7. Same fossils found in all the same strata
- 9. Remains of preserved organisms
- 11. The exact age of something