Across
- 2. The age of the fossil in years
- 3. The age based on the rocks around the one you're looking at
- 8. when all of one thing dies and that thing is no more
- 10. Looks like a cockroach and Is also an index fossil
- 11. Rock at bottom=old Top=New
Down
- 1. study fossils
- 4. the surface where new rock meets old
- 5. A break in the earths crust
- 6. Very old rocks that had a life
- 7. Only lived for a short amount of time
- 9. Study rocks