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500 BCE
Cambrian Period 570-500MYA
The time of ancient life, Trilobites were the dominant species during this time period. Chordates were very popular in this time too, they were ancestors of spiders, insects and crustaceans. The end of this time period caused a series of mass extinctions, many shell like insects-brachiopods and other animals went extinct, also trilobites. -
445 BCE
Ordovician Period 490-445 MYA
The first lands start to appear, fungi and seaweed become existent. The ocean becomes full of corals and small type sea animals. The main living things had to do with the Marine Life. -
395 BCE
Silurian Period 435-395 MYA
The earliest time of terrestrial plants and animals, such as spiders, scorpions, insects, complex plants, and fish with bony jaws. Fish adapt to living in rivers and fresh water for the first time -
345 BCE
Devonian Period 395- 345 MYA
Armored fish become extinct. Other fishes still exist and amphibians appear. First trees and plants spread across the land creating the first forests. -
280 BCE
Carboniferous 345- 280 MYA
Abundant sharks and amphibians become existent. Large swamps and coal forming forests are created. Earliest reptiles appear, scale trees, seed ferns, and early winged insects and cockroaches -
225 BCE
Permian Period 280- 225 MYA
Extinction of many Marine animals including Trilobites due to volcanic eruptions. 95% Marine animals went extinct and 50% of all animals going extinct. Amphibians dominated the land and early cone-bearing plants such as pine trees appeared. -
195 BCE
Triassic Period 225-195 MYA
Earliest dinosaurs, abundant cycads and conifers. Crocodiles and survivors of the Permian extinction go on to populate the land once again. -
136 BCE
Jurassic 195- 136 MYA
Earliest birds and mammals are existent, abundant dinosaurs and ammonites. Dinosaurs dominated the land at this time, the most common plant were ferns and palm-like trees called cycads and grass -
65 BCE
Cretaceous 136- 65 MYA
Earliest flowering plants, climax of dinosaurs followed by their extinction, great decline of Brachipods. An abundance of bony fish. 65% of species including dinosaurs went extinct when the extinction occured -
1 BCE
Tertiary Period 65- 1.8 MYA
Earliest placental mammals, modern mammals, large running mammals were all existent. Marine animals had a great population, whales now existed and flowering plants spread across the globe. -
Quaternary Period 1.8 MYA- Present
Large carnivores; neanderthals, humans, mastodons. The beginning of this time period was when the first modern humans appeared and developed civilization by the end of this period. Giant mammals such as, mammoths, saber-tooth cats, and giant camels dominated until 10,000 years ago when many large mammals went extinct.
