Ìgbà Tríásíkì

Ìgbà Tríásíkì 251–199.6 ẹgbẹgbẹ̀rún ọdun sẹ́yìn PreЄ Є O S D C P T J K Pg N
Mean atmospheric O₂ content over period duration	ca. 16 Vol %^[1] (80 % of modern level)
Mean atmospheric CO₂ content over period duration	ca. 1750 ppm^[2] (6 times pre-industrial level)
Mean surface temperature over period duration	ca. 17 °C^[3] (3 °C above modern level)

The Triassic is a geologic period that extended from about 250 to 200 Mya (million years ago). As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events. The extinction event that closed the Triassic Period has recently been more accurately dated, but as with most older geologic periods, the rock beds that define the start and end are well identified, but the exact dates of the start and end of the period are uncertain by a few million years.

During the Triassic, both marine and continental life show an adaptive radiation beginning from the starkly impoverished biosphere that followed the Permian-Triassic extinction. Corals of the hexacorallia group made their first appearance. The first flying vertebrates, the pterosaurs, evolved during the Triassic.

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Triassic Period
Lower/Early Triassic	Middle Triassic	Upper/Late Triassic
Induan \| Olenekian	Anisian \| Ladinian	Carnian \| Norian Rhaetian

Preceded by Proterozoic Eon	542 Ma - Phanerozoic Eon - Present
	542 Ma - Paleozoic Era - 251 Ma						251 Ma - Mesozoic Era - 65 Ma			65 Ma - Cenozoic Era - Present
	Kámbríà	Ọ̀rdòfísíà	Sílúríà	Dẹfoníà	Eléèédú	Pẹ́rmíà	Tríásíkì	Jùrásíkì	Ẹlẹ́fun	Ìbíniàtijọ́	Ìbíniọ̀tun	Quaternary

Ìgbà Tríásíkì

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