era geologica

Definitions of era geologica
  1. noun
    a major division of geological time; an era is usually divided into two or more periods
    synonyms: era, età
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    examples:
    cenozoico
    approximately the last 63 million years
    mesozoico
    from 230 million to 63 million years ago
    paleozoico
    from 544 million to about 230 million years ago
  2. noun
    a unit of geological time that is a subdivision of a period and is itself divided into ages
    synonyms: era, età
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    examples:
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    olocene
    approximately the last 10,000 years
    pleistocene
    from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution
    pliocene
    from 13 million to 2 million years ago; growth of mountains; cooling of climate; more and larger mammals
    miocene
    from 25 million to 13 million years ago; appearance of grazing mammals
    eocene
    from 58 million to 40 million years ago; presence of modern mammals
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