Stromatolites!

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Across
  1. 6. the product of anoxygenic photosynthesis
  2. 7. the phyla of photosynthesizing guys
  3. 8. trace fossil of microbial mats
  4. 9. the event that changed everything!
Down
  1. 1. light into energy
  2. 2. the name of my paleo prof who I love
  3. 3. small preserved feature of some mats
  4. 4. a type of stromatolite
  5. 5. Iron > 50µm