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List of Geologic Timescale

    0.04 sec.
Geologic Timescale
Era Period Epoch Approximate duration
(millions of years)
 Approximate number of years ago
(millions of years)
Cenozoic Quaternary Holocene 10,000 years ago to the present  
Pleistocene 2 .01
Tertiary Pliocene 11 2
Miocene 12 13
Oligocene 11 25
Eocene 22 36
Paleocene 71 58
Mesozoic Cretaceous   71 65
Jurassic   54 136
Triassic   35 190
Paleozoic Permian   55 225
Carboniferous   65 280
Devonian   60 345
Silurian   20 405
Ordovician   75 425
Cambrian   100 500
Precambrian     3,380 600


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