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Fossil Stromatolites (3.5 BYA)

Fossil Stromatolites (3.5 BYA). Stromatolite Formation. Fig. 2.8 in Willis and McElwain 2002. Ancient Fossil “Cyanobacteria” (3.47 BYA). Apex Chert in Western Australia (Pilbara Formation). http://marsfossil.home.netcom.com/images/pilbara_detail.jpg. Banded Iron Formations

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Fossil Stromatolites (3.5 BYA)

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  1. Fossil Stromatolites(3.5 BYA)

  2. Stromatolite Formation Fig. 2.8 in Willis and McElwain 2002

  3. Ancient Fossil “Cyanobacteria”(3.47 BYA) Apex Chert in Western Australia (Pilbara Formation) http://marsfossil.home.netcom.com/images/pilbara_detail.jpg

  4. Banded Iron Formations (Up to 3.7-3.8 Billion Years Ago) Evidence for Pulses of Free Oxygen

  5. Red Beds (Up to 2.3 Billion Years Ago) Evidence for Free Oxygen Accumulation

  6. Heterocysts (Up to 2.1 Billion Years Ago) Microbiology 155 (2009), 1418-1426

  7. Fossil Stromatolites with Fossil Microorganisms(2 BYA) Gunflint Chert – Ontario, Canada (2 BYA)

  8. Fossil Eukaryotic Cells (2.1 – 1.1 BYA) Grypania ciliaris (Alga) in Northern Michigan

  9. Fossil “Red Alga” in Arctic Canada (1200 MYA) “Bangia” Figs. 2.12 in Willis and McElwain 2002

  10. Fossil “Green Alga” in Spitsbergen (800-700 MYA) “Cladophora” Fig. 2.14 in Willis and McElwain 2002

  11. Fossil Tetrads (> 470 MYA) Bitter Springs Formation, Australia

  12. Cooksonia (420 MYA)

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