phanerozoic aeon

Noun
  1. The period from about 540 million years ago until the present, a period when abundant life existed (synset 115149100)
    is an instance of: aeon, eon - the longest division of geological time
    has: age of mammals, cenozoic, cenozoic era - approximately the last 63 million years
    same as: phanerozoic, phanerozoic eon

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