Geologic time scale

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Across
  1. 2. estimate of a rocks age.
  2. 4. science that deals with earth's physical structure and substance.
  3. 5. when the highest layer is youngest and bottom layer is oldest.
  4. 6. any feature that cuts through the ground is younger than everything it cut through.
  5. 7. near exact age of a rock.
  6. 9. bones buried in dirt.
Down
  1. 1. Remains of plants/animals preserved in sediments.
  2. 2. a lump of minerals.
  3. 3. any material trapped inside a mineral as it forms.
  4. 8. a long period in time.