Stromatolite fossil dating


19-Oct-2020 10:56

New stromatolite localities have continued to be discovered in various places such as the Bahamas, the Indian Ocean and Yellowstone National Park, to name but a few localities.Stromatolites occur throughout the world, but become diminishingly uncommon in the Archaean.In some cases, they can form inorganically, for example when seawaters are oversaturated with certains chemicals resulting in precipitation.Stromatolites are defined as laminated accretionary structures that have synoptic relief (i.e., they stick up above the seafloor).We humans have descended from organisms that adapted to living in a prokaryotic world, and we humans retain (conserved in evolutionary terms) in our Eukaraotic mitochondria the cellular machinery to power our cells that we inherited (i.e., Endosymbiosis) from the prokaryotes of deep time on earth.Scientists disagree on how to define stromatolites.Stromatolite-building communities include the oldest known fossils, dating back some 3.5 billion years when the environments of Earth were too hostile to support life as we know it today.

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Excluding some exceedingly rare Precambrian fossils such as the Russian White Sea Ediacaran fauna, stromatolites and thare the only fossils encoding the first 7/8th of the history of life on earth.It does contain a modicum of truth, however, in that the largest volume of stromatolitic formations was likely formed by biogenic processes involving photosynthetic cyanobacteria.