Triassic Period
The Triassic period is the first period of the Mesozoic era, lasting from approximately 251 to 201 million years ago. It is known for significant geological, climatic, and evolutionary changes, including the diversification of reptiles and the emergence of the first dinosaurs.
Geological Events
- Breakup of the supercontinent Pangaea
- Rise of the first flying vertebrates
- Formation of the Atlantic Ocean
Climate
The climate during the Triassic period was generally warm and arid, with large seasonal temperature variations in some regions. The lack of polar ice caps and relatively low sea levels allowed for extensive shallow seas and widespread desert conditions.
Life Forms
The Triassic period witnessed the proliferation of reptiles, including early dinosaurs, as well as the emergence of mammals, conifers, and other plant groups. In the oceans, marine life diversified, with the appearance of new fish and marine reptiles.
Study Guide
- What major geological event occurred during the Triassic period?
- Describe the climate of the Triassic period.
- What significant developments in life forms took place during the Triassic period?
- How did the breakup of Pangaea impact the distribution of land and oceans?
- Compare and contrast the Triassic period with the preceding period, the Permian.
