Geologic Time Scale
All times are given in millions of years before present.

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EraPeriodEpoch
Cenozoic
65 to Present
Quaternary
1.6 to Present
Holocene
0.01 to Present
Pleistocene
1.6 to 0.01
Tertiary
65 to 1.6
Pliocene
5 to 1.6
Miocene
26 to 5
Oligocene
38 to 26
Eocene
54 to 38
Paleocene
65 to 54
Mesozoic
245 to 65
Cretaceous
140 to 65
Jurassic
210 to 140
Triassic
245 to 210
Paleozoic
570 to 245
Permian
290 to 245
Carboniferous
365 to 290
Devonian
413 to 365
Silurian
441 to 413
Ordovician
504 to 441
Cambrian
570 to 504