GeologicTimescale

Numbers refer to end of time period, in millions of years before now.

NeogenePeriod

PleistoceneEpoch (=Quaternary)

1.8 PlioceneEpoch

5 MioceneEpoch

23 PalaeogenePeriod

OligoceneEpoch

38 EoceneEpoch

54 PalaeoceneEpoch

65 MesozoicEra

CretaceousPeriod

146 JurassicPeriod

208 TriassicPeriod

245 PalaeozoicEra

PermianPeriod

286 CarboniferousPeriod

UpperCarboniferous (=Pennsylvanian)

325 LowerCarboniferous (=Mississippian)

360 DevonianPeriod

410 SilurianPeriod

440 OrdovicianPeriod

505 CambrianPeriod

544 ProterozoicEra |

2500 ArchaeanEra | PrecambrianEon (as opposed to PhanerozoicEon)

3800 HadeanEra |