Adriyanna Mercado - Period 7 EES

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Across
  1. 3. One of the three boundaries that occurs when plates move towards each other and collide
  2. 5. non-depositional surface separating two rock masses of different ages
  3. 8. Third-Longest division of Geologic time
  4. 13. A type of body fossil that forms when crystals fill a mold
  5. 16. Chlorophyll-containing, photosynthetic bacteria thought to be one of the earth life-forms
  6. 17. Era of ancient life
  7. 18. Organism with a three-Lobed exoskeleton that was abundant in paleozoic oceans and considered to be an index fossil
  8. 19. A time where it was the longest part of earth's history
Down
  1. 1. Middle era of earths history
  2. 2. One of the three boundaries that occurs when two tectonic plates move away from each other
  3. 4. Principle stating that earths processes occurring today are similar to those that occured in the past.
  4. 6. Preserved remains of plants and animals
  5. 7. A Four lettered fungi
  6. 9. a long and distinct period of history with a particular feature or characteristic.
  7. 10. The outermost layer of Earth's lithosphere that is found under the oceans
  8. 11. a division of time that is a subdivision of a period and is itself subdivided into ages, corresponding to a series in chronostratigraphy.
  9. 12. One of the three boundaries that occurs when two tectonic plates slide sideways past each other
  10. 14. A supercontinent
  11. 15. an indefinite and very long period of time
  12. 16. An era that began recent life about 66 million years ago and continues today