Across
- 4. when the small holes in an organism's body are filled with minerals
- 9. the age of something compared to something else
- 11. intrudes in on rock layers
- 12. this occurs when an organisms body tissues are replaced by minerals
Down
- 1. increases an organism's chances of becoming fossil
- 2. preserved remains or traces of an organism
- 3. the name for layers of rocks
- 5. miniature fossils of tiny organism
- 6. a scientist who studies fossils
- 7. when a organism leaves footprints, burrows , or other features
- 8. fossils that form when the body of an organism leaves an imprint in the sediment
- 10. this thing still lives today and also lived 40,000 years ago