Across
- 1. Any plant or animal preserved in rock (DEX).
- 4. Broken down rocks.
- 6. Divides earth's history.
- 8. A branch of geologic connected with the study of rock layers.
- 9. A scientific method that can actually determine the age of organic materirals as old as 60K years.
- 10. A bed of ignous rock that has cystalized from malton lava.
- 11. Mesure the physical propertys of an object to calculate its age.
Down
- 2. Oldest layer is on top, Youngest is on the bottom.
- 3. Relitave order of past events.
- 5. Stacked up layers of sedenmentary rock.
- 7. Made up of all the fossiles that have been found along with their relative ages.