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Cambrian 570-500mya
Multi-celluar life foemed on Earth for the first time. -
Ordovician 500-435mya
Intertebrate are dominat, mollures became abundant. -
Silurian 435-395mya
earliest terrestrial plants & animals, tiktalalik, eurterids devetod. -
Devonian 395-345mya
Armored fish go extinct but abondane of several spiecies of fish form, -
Carboniferous 345-280mya
abundant of sharks, large swamps and cool forrest. -
Permian 280-225mya
Extinction of many types of marine animals, including triolabites. -
Triassic 225-195mya
earliest dinosaurs, abundant cyads, and conifers. -
Jurassic 195-136mya
Earliest birds and mammals, abundant dinosaurs -
Cretaceous 136-65mya
Earliest flowering plants, abundance of bony fish. -
Tertiary 65-1.8mya
Earliest placental mammals, modern mammals, large running animals. -
Quaternary 1.8mya-Present
Large cornivores, humans, mostodons
