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1 BCE
Beginning of Earth
4,600,000,000 years ago, the Earth was formed -
1 BCE
Life began
3,800,000,000 years ago, the history of life began -
Ordovician
488.3 million years ago to 443.7 million years ago
This species lived on the supercontinent of Gondwana in the North pole. Gondwana then shifted to the towards the South pole leaving it almost entirely submerged in water and killing the species. The disappearance was 60% of all marine invertebrate genera and 25% of all families went extinct.
Species that went extinct graptolite, conodont, and trilobite.
The environment was mostly shallow seas covering most of the world. -
Devonian
419.2 million years ago to 258.9 million years ago. Killed by many different things including prolonged biodiversity loss and and overlaying sandstone deposit. Overall, 19% of all families and 50% of all genera became extinct. Placoderms, jawless fish, and tetrapods disappeared. By the late Devonian, the land had been colonized by plants and insects. In the oceans were massive reefs built by corals and stromatoporoids. -
Permian
252 million years ago. The reason for this extinction was meteor impact events, massive volcanism such as that of the Siberian Traps, and the ensuing coal or gas fires and explosions. It is the Earth's most severe known extinction event, with up to 96% of all marine species. Species that went extinct were ladinian, anisian, and olenekian. Many volcanoes and green houses gases within the environment. -
Triassic
201.3 million years ago. 34% of marine genera disappeared. On land, all pseudosuchians other than crocodylomorphs , some remaining therapsids, and many of the large amphibians became extinct. The environment was very rich with plants and animals. -
Cretaceous
66 million years ago. Died from a massive asteroid. 75% of plant and animals on Earth became extinct. Extinction killed off plesiosaurs and the giant marine lizards and devastated fish, sharks, mollusks and many species of plankton. Rich with plants and animals within the environment.
