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Tertiary period

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.Tertiary period - from 63 million to 2 million years ago
Tertiary
Age of Mammals, Cenozoic, Cenozoic era - approximately the last 63 million years
Pliocene, Pliocene epoch - from 13 million to 2 million years ago; growth of mountains; cooling of climate; more and larger mammals
Miocene, Miocene epoch - from 25 million to 13 million years ago; appearance of grazing mammals
Oligocene, Oligocene epoch - from 40 million to 25 million years ago; appearance of sabertoothed cats
Eocene, Eocene epoch - from 58 million to 40 million years ago; presence of modern mammals
Paleocene, Paleocene epoch - from 63 million to 58 million years ago; appearance of birds and earliest mammals


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