The Triassic period
251.902 to 201.4 million years ago · Mesozoic era. Ages from the ICS International Chronostratigraphic Chart.
The Earth about 230 million years ago (Merdith et al. 2021 plate model). Explore this period on the timeline: 215 Ma · 230 Ma
| Began | 251.902 million years ago |
|---|---|
| Ended | 201.4 million years ago |
| Era | Mesozoic |
| Epochs | Early Triassic (251.902–247 Ma), Middle Triassic (247–237 Ma), Late Triassic (237–201.4 Ma) |
| Duration | 50.5 million years |
About the Triassic
The Triassic ( try-A-sik) is a geologic period and a stratigraphic system that spans 50.5 million years from the end of the Permian Period 251.902 Ma (million years ago) to the beginning of the Jurassic Period 201.4 Ma. The Triassic Period is the first and shortest geologic period of the Mesozoic Era, and the seventh period of the Phanerozoic Eon. The start and the end of the Triassic Period featured major extinction events.
Featured animals of the Triassic (21)
Megalosaurus205.7–66 Ma
Ichthyosaurus227.3–100.5 Ma
Nothosaurus250.8–201.4 Ma
Mastodonsaurus247–201.4 Ma
Coelophysis227.3–192.9 Ma
Herrerasaurus237–227.3 Ma
Eoraptor233.6–227.3 Ma
Plateosaurus227.3–199.5 Ma
Massospondylus237–174.7 Ma
Scelidosaurus205.7–174.7 Ma
Shonisaurus233.6–201.4 Ma
Mixosaurus247–237 Ma
Plesiosaurus205.7–66 Ma
Placodus250.8–227.3 Ma
Postosuchus237–201.4 Ma
Acanthostega443.1 Ma to the present
Lystrosaurus264.28–247 Ma
Cynognathus247–233.6 Ma
Thrinaxodon251.902–247 Ma
Morganucodon205.7–165.3 Ma
Orthoceras483.4–205.7 MaText in “About” is quoted from the Wikipedia article Triassic (revision 1380461221), licensed under CC BY-SA 4.0; introduction excerpted verbatim. Ages and colours: ICS chart (v2024/12) via the Paleobiology Database.