Across
- 2. the standard method used to divide Earth's long natural history into managable parts
- 4. a break in the geological record created when rock layers are eroded
- 7. any method of measuring the age of an event or object in years
- 8. trace or remains of an organism that lived long ago
- 9. Igneous rock that forms when magma is injected into rock and then cools and becomes hard
- 10. an ordered arrangement of rock layers based on relative ages
- 11. the scientific study of the origin, history and structure of Earth and the processes that shape it
Down
- 1. method of deterring the age of an event or object based on the age of an event or object around it
- 3. law of ________ is the principal that states when a fault of intrusion cuts through another layer, it is younger than the layers it cuts through
- 5. a fossil that is useful for dating and correlating the strata in which it is found.
- 6. a technique which is used to date materials such as rocks or carbon