Answer:
The end-Permian mass extinction, and the one that preceded it by nine 9 million years, the end-Guadalupian mass extinction, were both related to flood basalt eruptions, which caused an episode of greenhouse warming and the onset of deep sea anoxia.
Explanation:
The Permian-Triassic mass extinction was a very large mass extinction of plant and animal species that occurred about 251 million years ago, during the transition from the Permian to the Triassic. Several large-scale extinctions are known in Earth's history, of which the Permian-Triassic mass extinction is the largest.
95% of all marine species and about 70% of terrestrial vertebrates died out at the Permian / Triassic transition. It was also the only time that the insects also became extinct on a large scale; about 1/3 of all insect species disappeared during the Perm-Triassic mass extinction.
It is now believed that this extinction wave occurred within a very short time (about 1 million years) by geological standards. Evidence of a less severe wave of extinction, 9 million years earlier, has also been found in Greenland.
The Permian-Triassic transition was characterized by intensive volcanism. During this period, the Siberian Steps, a 200,000 km² basalt plateau, literally arose from the most extensive volcanic activity in Earth's history. As a result of this volcanism, the climate may have changed enough to produce a mass extinction.
Answer:
The volcano's eruption also had significant global environmental effects. Mount Pinatubo ejected roughly ten billion tons of magma onto the surrounding landscape and millions of tons of sulfur dioxide gas into the atmosphere, spreading an ash cloud over much of the earth.
Explanation:
1. used for building
small crystals
2. covers ocean floor
formed below the surface
3. extrusive igneous rock
granite
4. intrusive igneous rock
basalt
5. slow cooling
large crystals
6. fast cooling
formed on the surface
The current era is called the Cenozoic era.
Cenozoic era refers to the geological time period that extends from 65 million years ago to present-day.
It’s was caused by the volcanic mountain
