Geological timescale and life. Artwork of life that evolved on Earth's geological timescale from 4.567 billion years ago (top right) to the present day (bottom right),colour-coded for various geological eras,periods and epochs. 1) Precambrian (early life): Hadean,Archean,Proterozoic. 2) Paleozoic (fish,land plants,insects,amphibians,reptiles): Cambrian,Ordovician,Silurian,Devonian,Carboniferous,Permian. 3) Mesozoic (dinosaurs,flowers,birds,mammals): Triassic,Jurassic,Cretaceous. 4) Cenozoic (horses,primates,whales,humans): Paleocene,Eocene,Oligocene,Miocene,Pliocene,Pleistocene,and Holocene. See also: C021/3468,C021/3470 |