Mass Extinction Crossword

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Across
  1. 4. crater that hit the Yucatan peninsula
  2. 5. impact site in Sweden
  3. 6. responsible for volcanic activity in Siberia
  4. 7. most deadly mass extinction
Down
  1. 1. gas traps in Permian Triassic
  2. 2. responsible for volcanic activity in Western India
  3. 3. winning side of the debate