Geology

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Across
  1. 2. Magma that reaches Earth's surface
  2. 4. belief that the same natural laws and processes that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe.
  3. 6. rock that forms when existing rock is exposed to high pressure or high heat or both.
  4. 8. fossil
  5. 9. of widely distributed organisms that lived only during one short period.
  6. 11. Rock that forms when melted rock cools and hardens.
  7. 12. Vertical fault where is up and down (vertical).
Down
  1. 1. The time required for half of the amount of a radioactive parent element to decay into a stable daughter element.
  2. 3. Vertical fault where motional is side to side.
  3. 5. The surface where a new rock layer meets a much older rock surface. This is a gap in the geologic record.
  4. 7. Molten rock beneath the earth's surface
  5. 10. The impression of an organism in a rock.
  6. 13. igneous rock layer formed when magma hardens beneath the Earth's surface.