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500 BCE
Cambrian Period 570-500 MYA
Earliest record of marine life, like the Trilobites are most dominant. During this time the Cambrian Explosion occured killing all marine animals in 550 MYA also Rodinia was fully broken apart and now had an ozone layer. -
435 BCE
Ordovician Period 500-435 MYA
Echinoderms(starfish,sand dollars, sea urchins, sea cucumbers) existed. Invertebrates are the most dominant, mollusks became abundant. Earliest fish are jawless, but later on become jawed, armored fish. Due to the ozone layer life was able to live. -
395 BCE
Silurian Period 435-395 MYA
The earliest terrestrial plants and animals came to life. Tiktaalik Eurypterids develop. -
345 BCE
Devonian Period 395-345 MYA
Armored fish go extinct but, there is an abundance of several other species of fish. The earliest amphibians and ammonites come to life. -
280 BCE
Carboniferous Period 345-280 MYA
Abundance in sharks and amphibians. Swamplands and coal forming forest. Earliest reptiles, scale trees, and seed farms are very common. After most of the plants died they would become coal like. -
225 BCE
Permian Period 280-225 MYA
Extinction of many types of marine animals including trilobites due to the large volcanic eruptions. 95% of all marine species and 50% of all animals went extinct. -
195 BCE
Triassic Period 225-195 MYA
Earliest dinosaurs,abundant cycods and conifers. -
136 BCE
Jurassic Period 195-136 MYA
Earliest feathered birds and mammals, abundant dinosaurs and ammonites. Ferns, cycads and grasses are the most common land plants in this period. -
65 BCE
Cretaceous Period 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 dinosaurs. -
2 BCE
Tertiary Period 65-1.8 MYA
Earliest placental mammals,modern mammals, large running animals. -
1 BCE
Quarternary Period 1.8-Present Day
Large carnivores,neanderthals,humans and mastodons.
