-
570 BCE
Cambrian 570M-500M
Oceans covered the Earth's surface. All life was marine and mostly consisted of trilobites. -
500 BCE
Ordovician 500M-435M
Echinoderms, invertebrates, mollusks, fish, jawed and armored fish. -
435 BCE
Silurian 435M-395M
Animals were starting to go on land. Plants and animals, Tiktaalik, eurypterids existed. -
395 BCE
Devonian 395M-345M
Fish (armored extinct), amphibians and ammonites. -
345 BCE
Carboniferous 345M-280M
The Earth's surface was tropical swamplands. Reptiles, scale trees, seed farms, sharks and amphibians. -
280 BCE
Permian 280M-225M
Extinction of many marine animals including trilobites due to a mantle plume. -
225 BCE
Triassic 225M-195M
Earliest dinosaurs, cycads, conifers. -
195 BCE
Jurassic 195M-136M
Earliest birds, mammals, dinosaurs, ammonites. -
136 BCE
Cretaceous 136M-65M
Earliest flowering plants, climax of dinosaurs followed by extinction, decline in brachiopods, bony fish. -
65 BCE
Tertiary 65M-1.8M
Earliest placental mammals, modern mammals, large running mammals.