ORIGIN OF METABOLISMWhat was the earliest life and where didit get its energy?
Last impact heating~3500Geological stratigraphy,together with radioactivedating, show thesequence of events inthe history of the Earth.Note the entry for“cyanobacteria” and“stromatolites” only onebillion years after theformation of the Earth.
“The oldest actual fossils of microbial life date back some 3.6 to 3.5 billion years,which is a few hundred thousand years after the first chemical signs of life occurred.These fossils consist of delicate chains of microbes that look exactly like blue-greenbacteria...or cyanobacteria, which are still in existence today.”(Niele, p. 8)Were there actually living cells present 3.6 billion years ago?Did they form stromatolites?Were they cyanobacteria?If they were not cyanobacteria, what were they?
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Stromatolites can be recognized by their layered appearance.More stromatolites in Hamelin Pool,Shark Bay, Western Australia
Some ancient stromatolites are huge.Stromatolite from theCanadian NorthwestTerritories