-
570 BCE
570-500 mya cambrian period
Trilobites dominant, oceans dominated Earth, All life was marine -
500 BCE
Ordovician 500-435 MYA
Invertebrates were dominant, gondwana was the supercontinent, earliest fish evolved -
435 BCE
silurian 435-395 MYA
earliest terrestrial plants and animals , underwater life thrived -
395 BCE
devonian 395-345 MYA
armored fish go extinct but there's an abundance of several species of fish amphibians and ammonites -
345 BCE
carboniferous 345-280 MYA
abundant sharks and amphibians large swamps and coal forming forest earliest reptiles scale tress and seed ferns -
280 BCE
permian 280-225 MYA
extinction of many types of marine animals including trilobites due to larger volcanic eruptions 95% of species went extinct -
225 BCE
triassic 225-195 MYA
earliest dinosaurs abundant cycads and conifers life outside of ocean began to diversify -
195 BCE
jurassic 195-136 MYA
earliest birds and mammals abundant dinosaurs and ammonites -
136 BCE
cretaceous 136-65 MYA
earliest flowering plants climax of dinosaurs followed by their extinction great decline of brachiopods abundance of bony fish extinction of 65% of species including the dinosaurs -
65 BCE
tertiary 65-1.8 MYA
earliest placental mammals, modern mammals large running mammals -
1 CE
quaternary 1.8-present
large carnivores,neanderthals, humans, mastodons
