The Geological Timescale

Eon Era Period Epoch Time
Span
(Million years)
Duration
(Million years)

Phanerozoic

Cenozoic Quaternary Holocene        -   0.01  0.01
Pleistocene    0.01-   1.6  1.59
Tertiary Pliocene    1.6 -   5.3  3.7
Miocene    5.3 -  23.7 18.4
Oligocene   23.7 -  36.6 12.9
Eocene   36.6 -  57.8 21.2
Palaeocene   57.8 -  65  7.2
KT Boundary
Mesozoic Cretaceous   65   - 140 75
Jurassic  140   - 205 65
Triassic  205   - 250 45
Palaeozoic Permian  250   - 290 40
Carboniferous  290   - 355 65
Devonian  355   - 410 55
Silurian  410   - 438 28
Ordovician  438   - 510 72
Cambrian  510   - 540 30

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