Dinosaurs dominated, therefore a few mammals existed and similar fish of nowadays borned

More than 50% of the world's petroleum reserves formed, many of the trees were originated.

The dinosaurs became extinct because of an impact of an asteroid

All the complex organisms lived in the sea, for example: graptolites, trilobites and brachiopods. In the extinction all of them died.

In the extinction 85% of Earth's fauna disappeared probably because of global cooling and the lowering of sea levels.

Known as the era of the fish a great variety of them were created, plants and forests expanded; plants with seeds appeared; oil and gas fields formed.

The extinction killed 70% of marine creatures. Some possible causes are: global cooling, reduction in the levels of carbon dioxide or an asteroid impact.

In the extinction 90% of species died, but it affected more to marine species.

The Pangea formed. Fish, amphibians, reptiles, invertebrates, ferns and conifers were abundant.

Some possible causes of the extinction are: intense volcanism, poisoning of the seas and the atmosphere or collision of asteroids.

Some possible explanations for the extinction are: gradual climate changes, an asteroid impact, volcanic eruptions, or global cooling. :

Dinosaurs were dominating, mammals appeared, the breakout of Pangea began

The mass extinction was severe in oceans and affected a few in terrestrial ecosystems. The dinosaurs that survived the extinction evolved in the Jurassic period.