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Cambrian Period 570-500 MYA
Earliest marine life recorded. Abundant amount of Trilobites. -
Ordovician 500-435 MYA
Shallow seas covered large area of the world, lichen-like plants had begun to adapt themselves to life on land. -
Silurian 435-395 MYA
Cephalopods diversified to a variety of shapes and sizes. -
Devonian 395-345 MYA
During the Devonian Period, which occurred in the Paleozoic era, the first fish evolved legs and started to walk on land as tetrapods around 365 Ma. -
Carboniferous 345-280 MYA
The Carboniferous was a time of glaciation, low sea level and mountain building; a minor marine extinction event occurred in the middle of the period. -
Permian 280-225 MYA
It is the last period of the Paleozoic Era and famous for its ending epoch event, the largest mass extinction known to science. -
Triassic 225-195 MYA
During the Triassic, both marine and continental life show an adaptive radiation beginning from the starkly impoverished biosphere that followed the Permian-Triassic extinction. -
Jurassic 195-136 MYA
The start of the period is marked by the major Triassic–Jurassic extinction event. However the end of the Jurassic Period did not witness any major extinction event. -
Cretaceous 136-65 MYA
The Cretaceous was a period with a relatively warm climate and high eustatic sea level. The oceans and seas were populated with now extinct marine reptiles, ammonites and rudists; and the land by dinosaurs. -
Tertiary 65-1.8 MYA
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Quaternary 1.8 MYA - present
