Geology Cross Word Puzzle

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Across
  1. 5. An igneous rock layer formed when lava flows onto the Earth's surface and hardens.
  2. 8. Rock that forms when existing rock is exposed to high pressure or high heat or both.
  3. 9. Magma that reaches Earth's surface
  4. 11. The surface where a new rock layer meets a much older rock surface. This is a gap in the geologic record.
Down
  1. 1. The principle that in undisturbed rock layers, older layers of rock lie beneath younger rock layers
  2. 2. Fossils of widely distributed organisms that lived only during one short period.
  3. 3. An igneous rock layer formed when magma hardens beneath the Earth's surface.
  4. 4. The 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.
  5. 6. Molten rock beneath the earth's surface
  6. 7. The impression of an organism in a rock
  7. 10. A fossil copy of an organism made when a mold of the organism is filled with sediment or mineral deposits.