Rock Age and Earth's History

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