Across
- 2. used to define and identify geological periods
- 4. chemicals found in rocks and remains
- 6. fossils to tell absolute age
- 8. mostly tracks and burrows
- 9. preserved in the fossil record
- 10. at or below the level of analysis of the naked eye
Down
- 1. any fossolized remains
- 3. fossil found significally after death
- 5. study of fossils
- 7. remains that have not fully fossilized