Across
- 4. numeric age of a layer of rocks or fossils
- 7. calender of all earths events
- 8. an expert or student of geology
- 9. states youngest layer is the top one and the oldest is bottom
- 10. the remains of prehistoric organisms that are preserved
Down
- 1. rocks that started out as a different rock but have changed forms
- 2. The age of a rock layer compared to others
- 3. rate of decay
- 5. type of rocks formed together
- 6. useful for dating and correlating the strata in which is found