Pre Cambrian, Cambrian, Ordovician, Silurian, and Devonian Review

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Across
  1. 3. - "Plated skin" fishes
  2. 5. - "Bony skin" fishes
  3. 8. - The continent that split apart 720 million years ago
  4. 9. - Fishes with paired find and scales
  5. 10. - The presence of these deposits worldwide lead us to believe Snowball Earth occurred
  6. 12. - Predatory arthropod
  7. 13. - Orogeny that began the building of the Appalachian Mountains
  8. 14. - Type of coral known as a horn coral
  9. 16. - Earliest known vertebrate animals
  10. 17. - Largest Ordovician predator
Down
  1. 1. - Continent that was the craton of present-day North America
  2. 2. - Ancient lobe-finned fish still alive today
  3. 4. - Type of deposit involved with mountain building that is composed of turbidites and shale deposits
  4. 6. - Early Cambrian suspension feeders
  5. 7. - Siliciclastic deposit resulting from weathering and erosion of uplifted mountains
  6. 11. - Soft-bodied animal found in the Burgess Shale that possesses a notochord
  7. 15. - Jaws evolved from these