Geologic Time Vocab

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Across
  1. 2. The remains of impressions of a prehistoric organism preserved in petrified form as a mold or cast in rock
  2. 9. The law of superposition states that the oldest is on bottom and the youngest is on top.
  3. 12. A fossil that is converted into carbon, typically by heating or burning, or during fossilization.
  4. 13. A fossil that maintained or stayed in its original or existing state.
  5. 15. The time period in which life on earth first started.
  6. 16. An extinct marine arthropod that occurred abundantly during the Paleozoic era.
  7. 17. An evidence or imprint of an prehistoric animal.
  8. 19. A divided part of time in an Era. A smaller piece of the Geologic Time Scale.
Down
  1. 1. A fossilized impression made in mud or clay.
  2. 3. A fossil that is used for dating and correlating the time it was found.
  3. 4. The time period in which amphibians and insects began ruling the earth.
  4. 5. The time in which mammals began ruling the Earth. (Human/MammalEra)
  5. 6. A term used by paleontologist to refer to the total number of fossils that have been discovered.
  6. 7. A really long time frame on the Geologic Time Scale. (Paleozoic, Mesozoic, and Cenozoic)
  7. 8. The result is the geologic column, which breaks relative geologic time into units of known relative age.
  8. 10. A imprint of organic matter changed in o a stony substance. Petrified wood
  9. 11. The time period in which Reptiles began ruling the earth. (Dinosaurs)
  10. 13. The period in which the Earth was being created and constructed. (It was boring)
  11. 14. The second period of the Cenozoic Era in which we live in.
  12. 18. A divided part of time in a period. A smaller time frame in the Geologic Time scale.