-
By the start of the Triassic, all Earth's landmasses collided together to form a massive supercontinent called Pangea.
-
The organisms that survived the Permian extinction spread and recolonized.
-
A mass extinction at the end of the Permian Period killed 96% of all species. Millions of year passed before the number and diversity of living things began to rise again, starting the Triassic Period.
-
-
The coiled-shelled amonites, mollusks, and sea urchins survived the Permian extinction and quickly colonized and diversified. The first coral evolved, even though reef-building organisms already existed. Microsopic plants and plankton first appeared.
-
Petrosaurs (flying reptiles), frogs, salamanders, snakes, and crocodiles made their first appearance during the Triassic period.
-
Although gymnosperms evolved during the Permian period, fossil records show that gymnosperms became common during the Triassic. Some gymnosperms include conifers, cycads, and ginkoes. Moss, liverwort, and ferns also appeared.
-
Sea urchins called Arkarua first appeared.
-
Dinosaurs and lizards were evolving, and began to seperate because they evolved differently from one another.
-
Many types of reptiles evolved, and the first dinosaurs were among them.
-
Adelobasileus, a kind of proto-mammal emerged 225 mya.
-
The Lepidosauromorpha was first known in the fossil record during the Carnian stage in the late epoch of the Triassic period.
-
The earliest turtles like proganochelys appeared during the Norian stage in the late Triassic epoch.
-
A meteor hit Earth which resulted in an 100 meter crater in Manicouagan, Quebec, Canada.
-
Late in the Triassic, the first mammals evolved from a surviving froup of mammal-like reptiles. Triassic mammals such as Megasostrodon, were small, rodent-like animals.
-
At the end of the Triassic period, an extinction event occured along with large volcanic eruptions. This event greatly efected life in the oceans' 22% of marine families and half of the marine genera went extinct.
-
Towards the end of the Triassic, Pangea began to split apart slowy. The split began as Sfrica pulled away from North and South America