Across
- 2. entrance of magma through rock formations
- 3. comparison of age based on what is older
- 4. timeline of Earth's history
- 6. finding the age of fossil based on decay
- 8. a scientist who studies fossils
- 10. a fossil- can be found in one time layer
- 11. movement of magma through Earth's crust
Down
- 1. law states-top layer is the youngest layer
- 5. cylinders of ice drilled from glaciers
- 7. the exact age of a rock/ rock layer
- 9. remains of a prehistoric creature
- 11. division of time marked by large events