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Paleoproterozoic adjective

  • (geology) Of a geologic era within the Proterozoic eon from 2,500 to 1,600 million years ago.
 paleoproterotsooinen, varhaisproterotsooinen

Paleoproterozoic properNoun

  • (geology) The era from 2,500 Ma to 1,600 Ma, marked by a dramatic increase in atmospheric oxygen.
 paleoproterotsooinen maailmankausi, varhaisproterotsooinen maailmankausi
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