Eoarchean

Eoarchean
of a geologic era within the Archaean eon from about 4600 to 3600 million years ago; the first single-celled life began at this time
2. noun
the Eoarchean era

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  • Eoarchean — In the geologic record the Eoarchean erathem (pronEng|ˌiːoʊɑrˈkiːən, also spelled Eoarchaean) and the Eoarchean era in the geologic timescale correspond to one another in the dual system of classification of rock strata laid down beginning 4000… …   Wikipedia

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