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Cambrian *570m -500*
Earliest record of marine life-tribolites are dominant. The end of the period was eventually set at a fairly definite faunal change now identified as an extinction event. -
Ordovician *500m-435m*
echinoderms (starfish, sand dollars, sea urchin, and sea cucumbers) . Invertebrates are dominant,mollusks become abundant. Earliest fish that are jawless and later, jawed and armored fish. -
Silurian *435m-395m*
Earliest terrestrial plants and animals.Tiktaalik eurypterial develops. -
Permian: 280m - 225m
Extinction of many types of marine animals including trilobites. -
Triassic: 225 - 195m
Earliest dinosaurs, abundant cycods and conifers. -
Jurassic: 195m - 136m
Earliest birds and mammals abundant dinosaurs and ammonites. -
Cretaceous: 136m - 65m
Earliest flowering plants,climax of dinosaurs followed by their extinction -
Tertiary: 65m - 1.8m
Earliest placental mammals, modern mammals, large mammals. Antartica drifted to its current position over the South Pole during this era. Widespread volcanic activity was prevalent. -
Quartenary: 1.8m - present
Large Canivore, neaderthals, humas, mastadons. Climate change and the developments it spurs carry the narrative of the Quaternary. -
Devonian 395m -345m
Armored fish go extinct, but abudance of several species of fish. Earliest amphibians and ammonites. -
Carboniferous: 345m - 280m
(Mississippian,Pennsylvanian) Abundant sharks and amphibians large swamps and coal forming forests. Earliest reptiles, scale trees and seed ferns.
