Geological Time Scale

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Across
  1. 1. The amount of time it takes for a remaining isotope to decay to a daughter product
  2. 3. the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
  3. 7. Law of... where a rock, fault, or other geologic feature must be younger than any rock across which it cuts
  4. 10. law of...where older rocks and rock layers are formed first and are beneath younger rocks and rock layers
Down
  1. 2. a fossil that is useful for dating and correlating the strata in which it is found.
  2. 4. a layer or a series of layers of rock in the ground.
  3. 5. The exact date of a specific rock layer
  4. 6. Law of...where inclusions of rock fragments inside rock strata is older than the layer it is in
  5. 8. The approximate age of a specific rock layer.
  6. 9. according to relative age which layer is the youngest in strata