2. the Precambrian and the evolution of life

6. The phylogenetic tree (‘Tree of Life’) prokaryotes eukaryotes

8. Recent “stroms*” from the Bahamas *geo jargon for ‘stromatolites’

9. Obsidian Pool at Yellowstone Nationalpark, USA

10. cyano bacteria (prokaryotes) from Yellowstone, USA

11. cyano bacteria (southern California, USA)

13. modern example of cyano bacteria living in limestone

14. stromatolites at Sharks Bay, Western Australia

15. columnar stromatolites at Hamelin Pool, Sharks Bay, AUS

16. stromatolites at Sharks Bay, Western Australia note: stromatolites indicate shallow water depth!

17. stromatolites at Sharks Bay, Western Australia

20. Early Cambrian stromatolites (girvanella)

21. Precambrian stromatolites

23. Remember: stromatolitic limestones/dolomites are shallow-water sediments!

24. Precambrian stromatolites

26. domal stromatolites Campbellrand dolomite, South Africa (2550 m.y. old)

27. large Archean stromatolites at Steep Rock, CDN

28. Sharks Bay: Recent stromatolites Warrawoona: 3460 m.y. old stromatolites

29. 3460 m.y. old cyano bacteria from Warrawoona, AUS

30. an artist’s view of the Archean landscape

31. silica- and iron- impregnated stromatolite

32. Remember: …indicate deposition at shallow water depth!