Across
- 5. If you do not know the age of a rock layer you can tell its relative age
- 8. the rate of decay
- 9. the entire history of earth
- 10. any geological fault is younger than layers it cuts through
Down
- 1. the study of rocks and rock layers
- 2. Dating that gives an actual years
- 3. the assumption that lower layered rocks are older than higher layers
- 4. the dead remains of animals
- 6. useful fossils for dating and correlation
- 7. people who study rocks and rock layers