Navigation:Geological Time Periods

= Hadean Eon = 4540-4000 MYA

''No life is yet known from the Hadean eon. As knowledge advances, this could certainly change, but at present, life is believed to have first evolved during the Archaean eon.''

= Archaean Eon =

= Proterozoic Eon =

= Phanerozoic Eon = 545-0 MYA

Nearly all fossil species are from the Phanerozoic Eon.

Paleozoic Era  (545 - 252 million years ago)

Mesozoic Era  (252 - 66 million years ago)

Cenozoic Era (66 - 0 million years ago=