Mesozoic
It ended with the second largest extinction event in history... The extinction is very little known becouse there are no dinosaurs involved... haha. But the cause of the extinction has not yet ben officialy determined. There are ofcourse theories, but none are really used as a label yet.
There are so far 4 Eras in the earths history. the one that started the beginning if the earths history: Precambrian Time. The one after that was the Paleozoic Era, which means "ancient life." next was mesozoic which means "middle life" the one we are in is called the Cenozoic Era which means" recent life." * All Eras ended with a mass extinction.
The Permian was the last period of the Paleozoic Era, spanning 299-351 million years ago. It was a time during which reptiles diversified. It ended with the Permian-Triassic extinction event, the largest mass extinction in Earth's history.
The largest extinction event known is the Permian-Triassic Extinction Event, 250 million years ago. It is nicknamed "The Great Dying" in reference to how 96% of all known marine animals and 70% of all known terrestrial vertebrates at the time went extinct due to climatic changes because of volcanic eruptions and the formation of Pangaea.
the extinction of the dinosuars
Mesozoic
The Permian-Triassic extinction event, around 252 million years ago, marked the end of the Permian period and the beginning of the Triassic period. It is the most severe extinction event in Earth's history, wiping out approximately 95% of marine species and 70% of terrestrial vertebrate species. The Cretaceous-Paleogene extinction event, about 66 million years ago, ended the Cretaceous period and led to the extinction of the non-avian dinosaurs and about 75% of all plant and animal species.
Rare Earths Facility ended in 1973.
Extinction did.
It was the second largest extinction in terms of loss of life. The extinction was caused by the movement of Gondwana into the south polar region which led to glaciation and subsequent sea level fall. At this time all know life was confined to the oceans and 60% of marine invertebrates died. The event ended when Gondwana moved out of the south polar region, the glaciers melted, and sea level returned to normal.
The last period of the Paleozoic Era is the Permian Period, which lasted from about 299 to 252 million years ago. It ended with the largest mass extinction event in Earth's history, wiping out around 90% of marine species and 70% of terrestrial species.
Scientists believe the Cretaceous-Paleogene extinction event, or the plants dying at the end of the Mesozoic Era, was caused by a massive asteroid/comet impact. The theory suggests that the impact had catastrophic effects on the environment, including an impact winter, which prevented the plants from carrying out photosynthesis.