age of mammals

1. Approximately the last 63 million years (synset 115149313)
   is an instance of: era, geological era - a major division of geological time; an era is usually divided into two or more periods
   has:

   • age of man, quaternary, quaternary period - last 2 million years
   • tertiary, tertiary period - from 63 million to 2 million years ago
   is a part of: phanerozoic, phanerozoic aeon, phanerozoic eon - the period from about 540 million years ago until the present, a period when abundant life existed
   same as: cenozoic, cenozoic era

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