Historical Geology (GEOL102) - Exam 4 Review Crossword

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Across
  1. 1. Organisms that live at or near the seafloor
  2. 3. Transgressive sequence characterized by black shale deposits
  3. 7. Chordates and echinoderms share a RADIAL or SPIRAL embryonic cleavage (pick one)
  4. 10. During a regressive event, erosion leaves behind an ________.
  5. 12. The second known transgressive event in North American history
  6. 15. Early vertebrate with a central nervous system, skeletal rod and filtering organs
  7. 16. The first transgressive event and cratonic sequence in North American history
  8. 17. Location where soft-bodied organisms from the Paleozoic were found in Canada (2 words)
  9. 18. Rocks found in regions that were, at one time, swampy
  10. 19. Period of the Paleozoic that had an “explosion” of new organisms
  11. 20. The type of deposit found behind reef complexes
Down
  1. 2. Geologist who drew the first geologic map of England, last name
  2. 4. Paleozoic period where the earliest freshwater fish emerged
  3. 5. Period of the Paleozoic that is characterized by "great" and rapid biodiversity
  4. 6. Period that had the third, and largest recorded, mass extinction event
  5. 8. Evolutionary development that allowed reptiles to move onto land (2 words)
  6. 9. Deposits that have repeating marine and nonmarine layers
  7. 11. Paleozoic period characterized by rapid evolution of land plants
  8. 13. The second known supercontinent in Earth’s history
  9. 14. Extremely common three-lobed arthropod in the Cambrian