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wood prints microfossils wood prints fossil wood prints blue green algae wood prints blue-green algae wood prints cyanobacteria wood prints palaeontology wood prints plant wood prints plants wood prints fossils wood prints paleontology wood prints light micrograph wood prints

photographs microfossils photos fossil photos blue green algae photos blue-green algae photos cyanobacteria photos palaeontology photos plant photos plants photos fossils photos paleontology photos light micrograph photos

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Light micrograph of a rock thin section of Gunflint cherts from Ontario, Canada, showing fossil remains of the earliest life forms yet found, dating from two billion years ago. At this magnification structures are hard to discern, but the sample includes a mixture of organic detritus, filaments resembling the modern day filamentous blue green algae, colonies of algae (spikelets) & spheroids associated with current coccoid blue green algae. These primitive plants gained energy through photosynthesis, releasing free oxygen into the environment as a by product. This had far reaching consequences for the subsequent history of the environment.Magnification:X10 at 35mm size.

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