We presented information about the Hadean and Archean eons, including evidence that there were blue-green algae even in the Hadean Eon. The variety of life on Earth grew through the Archean Eon and the following Proterozoic Eon. Then we enter the Phanerozoic Eon, the one we are now living in. It's beginning is marked by the Cambrian Explosion. Life became abundant, and in short order, geologically speaking.
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Earth ScienceMr. Swackhamer Archives
March 2020
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