-
Cambrian 570m-500m
Earlist record of marine life- trilobites are dominant -
Period: to
Palleozoic
Old life -
Ordovician 500m-435m
Echinoderms(starfish, sand dollar, sea urchin and sea cucumbers) Invertabres are dominant, mullusks become abundant. Earlist fish that are jawless and later jawed and amored fish. -
Silurian 435m-395m
Earlist terrestrial plants and animals. tikaaliik euryplorids devolpe -
Devonian 395-345m
Armored fish go extinct, but abundance of several species of fish. earlist amphibians and ammonites -
Carboniferous 345-280m
Abundant sharks and amphibians. Large swamps and coal forming forests. Earlist reptiles. Scale trees and seed ferns -
Parmain 280-225m
Extinction of many types of marine animals including trillubites -
Period: to
Mesozoic period-
middle life -
Triassic 225m-195m
Earlist Dinosuars, abundant cycads and conifers -
Jurassic 195m-135m
Earlist birds, and mammals. Abundant dinosuars and ammonites -
Cretaceas 136m-65m
Earlist flowweing plants, climax of dinosuars followed by their extintion. Great decline of brachiopods. Abundance in bony fish -
Period: to
Cenozoic
New life -
Terriary period 65-1.8m
Earlist placential mammals, modern mammals, large running mammals. -
Quatemary 1.8m-present
Large carnivors, neaderthols, humans mastoclones
