Chapter 12 Geologic Time

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Across
  1. 2. Developed Charles Darwin stating that all different kinds of living things changed over time
  2. 4. The principle of ______ ________ _________ says that a rock is younger than any rock through which it cuts
  3. 6. The remains or traces of an organism preserved from the geologic past
  4. 7. The Principle of _________ __________ says that fossil organisms succeed one another in a definite order in the rock record
  5. 8. Process by which rocks are placed in proper sequence or order
  6. 9. Largest time unit on the geologic time scale
  7. 10. A type of fossil that is associated with a particular span of geologic time
Down
  1. 1. The Law of _______ states that each bed of rocks is older than the layers above and younger than the layers below
  2. 3. The principle of ________ _______ says that layers of sediment are generally deposited in a horizontal position
  3. 5. The division of Earth history into blocks of time
  4. 11. This time division of the geologic time scale is divided into shorter units called periods